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Rating is 4.8 out of 5.
4.8/5
based on 164 client reviews
  • $65 hourly

    • 5.0/5
    • (6 jobs)
    Python 🐍, AI 🤖, Web App Development 🌐, Data Pipelines 📊, Django 🕸️, JavaScript 📜, Web Scraping 🕷️, BeautifulSoup 🍲, Selenium 🗃️, TensorFlow 📈, Time-Series Analysis ⏳, Google Cloud ☁️, Numpy/Pandas 📊, Keras ⚙️ Hi, I’m Andrew parzyszek, a Python specialist with 15 years of professional experience. I’ve completed numerous projects in software, AI, and web app development. I specialize in creating data pipelines and AI architectures using Python. My background includes a solid German education and I am currently based on the US west coast. I also have a strong track record in web app development using Django and JavaScript, along with various web scraping projects using BeautifulSoup and Selenium. 𝐒𝐤𝐢𝐥𝐥𝐬 𝐁𝐫𝐞𝐚𝐤𝐝𝐨𝐰𝐧: 🐍 𝐏𝐲𝐭𝐡𝐨𝐧: Extensive experience in Python programming, creating data pipelines, and developing AI architectures. 🤖 𝐀𝐈: Specializing in AI development with TensorFlow, particularly in Time-series Analysis using LSTM/GRU. 🌐 𝐖𝐞𝐛 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭:Proficient in developing dynamic web applications using Django and JavaScript. 📊 𝐃𝐚𝐭𝐚 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬: Skilled in creating efficient and scalable data pipelines. 🕸️ 𝐃𝐣𝐚𝐧𝐠𝐨: Expertise in using Django for web development, integrated with JS, CSS, and HTML. 📜 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭: Competent in JavaScript for front-end development. 🕷️ 𝐖𝐞𝐛 𝐒𝐜𝐫𝐚𝐩𝐢𝐧𝐠: Experienced in web scraping using BeautifulSoup and Selenium. 📈 𝐓𝐞𝐧𝐬𝐨𝐫𝐅𝐥𝐨𝐰: Hands-on experience with TensorFlow, TensorFlow Datasets, and TensorBoard. ⏳ 𝐓𝐢𝐦𝐞-𝐒𝐞𝐫𝐢𝐞𝐬 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬:Specialized in analyzing time-series data using TensorFlow, LSTM, and GRU. ☁️ 𝐆𝐨𝐨𝐠𝐥𝐞 𝐂𝐥𝐨𝐮𝐝: Proficient in utilizing Google Cloud services for robust and scalable solutions. ⚙️ 𝐊𝐞𝐫𝐚𝐬: Skilled in Keras for deep learning projects, including Keras Tuner for hyperparameter optimization. 📊 𝐍𝐮𝐦𝐩𝐲/𝐏𝐚𝐧𝐝𝐚𝐬: Expertise in data manipulation and analysis using Numpy and Pandas. Let’s collaborate to bring your project to life! Contact me now to get started.
    Featured Skill React Native
    User Experience Design
    DevOps
    PHP
    Mobile App Development
    Laravel
    Machine Learning
    Data Science
    R
    Quantitative Finance
    Google Cloud Platform
    TensorFlow
    Python
    JavaScript
    Django
  • $150 hourly

    • 5.0/5
    • (10 jobs)
    I have an 100% client satisfaction rate (both on and off Upwork) and have 8 years of experience designing and building websites, web apps, and mobile applications. I design, build, deploy, and maintain full-stack cloud applications on Firebase or Supabase, my preferred tech stack is React & Next.js for web applications. I can cover end-to-end frontend, backend, and support for your teams as an advisor or hands-on builder. I pride myself on being a true Swiss Army knife for businesses in that I can both design beautiful digital experiences and dive deep into the technical infrastructure of any project. On top of that, I find many clients value my trustworthiness and ability to communicate complex topics into understandable language. Typescript, JavaScript, Node, Node.js, Vercel, React, Tailwind, Next.js, Supabase, and Google cloud backends are all my specialties. CMSs that I am proficient in include Webflow, Wordpress, Shopify, Magento, Squarespace, and Wix. Most of my work has been outside of Upwork so please check out my portfolio to see more of my style and skills. Over the past 8 years I have: - Designed, built, and deployed 30+ different websites/web apps/mobile applications - Performed over 1000 bug fixes - Designed hundreds of screens for apps and websites - Written 100s of thousands of lines of code - Delivered clear and concise communications with all clients - Been a part of a successful startup exit where I served as Creative Director What clients say about me: "Conor is a talented developer and partner, but his trustworthiness is what takes him to the next level as the guy to hire. I can rest easy knowing Conor is helping me with my platform." Jordan T., SaaS Startup “Conor wears so many hats. His talent, dedication, and passion for his craft shines through in every project he takes on." - Lisa M., Design Expert “Conor is professional, attentive, creative, and meets (or beats!) all deadlines. I feel like I have someone I can partner with and he’s already made such a great impact with our website. I just wish we had connected sooner!" - Doug S., eCommerce Platform Owner “I wish all of my professional experiences went the way working with Conor always goes” - Lisa S, Mental Health Author “All in all, Conor is not only a creative & development powerhouse but is also truly professional and goes the extra mile to ensure client satisfaction. Conor should write a book on how to properly communicate with clients.” - Ken C., Tech Entrepreneur “Conor is the most creative person I’ve ever worked with.” Paul K., Serial Entrepreneur “Every time we get on a phone call, I get so excited and energized to be working with you!” - Kristin O., Tech Entrepreneur My unique ability to wear multiple hats allows me to serve as a massive asset for small to medium-sized businesses, seamlessly adapting to diverse roles. I understand that businesses often require expertise in various areas, and I specialize in fulfilling those needs to optimize costs and drive sales. Throughout my career, I've had the privilege of working with diverse clientele, including MLB teams, celebrities, tech startups, television networks, serial entrepreneurs, non-profits, authors, eCommerce stores, and more. I can’t wait to get to work and deliver impeccable results for your project!
    Featured Skill React Native
    Vercel
    AWS Amplify
    Artificial Intelligence
    AI Bot
    ChatGPT
    TypeScript
    Graphic Design
    Web Design
    Back-End Development
    Front-End Development
    React
    Next.js
    Web Development
    Mobile App Development
  • $40 hourly

    • 5.0/5
    • (5 jobs)
    🚀 Full-Stack Mobile App Developer | Android, iOS, Hybrid | Expert in Flutter, React Native, SwiftUI | Kotlin, Swift, Dart | UI/UX Design 🔮 In the digital world, a great mobile app makes a difference. It improves user experience and sets you apart. As a developer, I focus on making apps that users love. My React Native expertise ensures great performance on all platforms, making your app stand out. 📱 Passionate about building top Android and iOS apps, I offer complete solutions for mobile app development. My skills cover native and hybrid apps, including advanced admin panels. I'm skilled in Kotlin, Swift, iOS, React Native, SwiftUI, Objective-C, Java, Typescript, and Dart. Your go-to for Flutter and API integration, delivering smooth apps. 🌐 Here's what I do: 📌 Comprehensive Requirement Analysis 🎨 Streamlined Design (UX & UI) 🚀 Development, Meeting Professional Standards 📦 App Deployment to Official Stores 💼 Long Terms Server Maintenance and Support 🎯 My Expertise: ✅ React Native Application Development (iOS / Android) ✅ Flutter Application Development (iOS / Android) ✅ Native Android Application Development(Java) ✅ Native iOS Application Development (Swift) ✅ Responsive Design 🔧 Technical Toolbox: ✅ Firebase (Auth, Realtime Database, Hosting, Firestore, Cloud Functions, Push Notifications, Config) ✅ GraphQL ✅ Redux/Redux Saga ✅ Xcode/Android Studio/IntelliJ IDEA ✅ Bitbucket/Github/Gitlab ✅ JIRA/Trello/BaseCamp ✅ Postman/Heroku ✅ NodeJS, JavaScript, ReactJS, PHP, Laravel, Python, Django ✅ AI, IoT ✅ AWS, S3, CDN (Cloudfront), DynamoDB, MongoDB, PostgreSQL, MySQL, NoSQL ✅ Dart, RxDart, BLoC Pattern, Provider ✅ JavaScript/ES6 & TypeScript, MVVM, RxSwift, RxJava, SOLID Principles, Generics 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮'𝐥𝐥 𝐆𝐚𝐢𝐧 𝐟𝐫𝐨𝐦 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐧𝐠 𝐰𝐢𝐭𝐡 𝐌𝐞: ✅ Custom React Native Mobile App Developer ✅ Multi User React Native Mobile App Developer ✅ GPS Based React Native Mobile App Developer ✅ Health Services React Native Mobile App Developer ✅ Uber Clone React Native Mobile App Developer ✅ Education Industry Mobile App Developer ✅ Retail Industry Mobile App Developer ✅ Worker and Jobs Management Mobile App Developer ✅ Custom Flutter Mobile App Developer ✅ Mobile App Developer with Firebase Backend ✅ Mobile App Developer with Custom Backend (Node.js, Laravel, Java, Django, and .NET) ✅ Native Android Mobile App Developer with Java ✅ Native Android Mobile App Developer with KOTLIN ✅ Native iOS Mobile App Developer with Objective C ✅ Native iOS Mobile App Developer with Swift ✅ Custom React Native Mobile App Developer ✅ React Native Mobile App Developer for Golf Mobile App ✅ React Native Mobile App Developer for Education Mobile App ✅ React Native Mobile App Developer for Sports Mobile App ✅ React Native Mobile App Developer for Fitness Mobile App ✅ React Native Mobile App Developer for Blockchain Mobile App ✅ React Native Mobile App Developer for Consulting Company Mobile App ✅ React Native Mobile App Developer for E-Commerce Mobile App ✅ React Native Mobile App Developer for Real Estate Mobile App ✅ React Native Mobile App Developer for Islamic Mobile App ✅ React Native Mobile App Developer for Religious Mobile App ✅ React Native Mobile App Developer for Events Mobile App ✅ React Native Mobile App Developer for Management Mobile App ✅ React Native Mobile App Developer for HR Mobile App ✅ React Native Mobile App Developer for Job Finder Mobile App ✅ React Native Mobile App Developer for IOT Mobile App ✅ React Native Mobile App Developer for Artificial Intelligence Mobile App ✅ React Native Mobile App Developer for Security Mobile App ✅ React Native Mobile App Developer for Digital Agency Mobile App ✅ React Native Mobile App Developer for Construction Mobile App ✅ React Native Mobile App Developer for Savings Mobile App ✅ React Native Mobile App Developer for Payment Transfer Mobile App ✅ React Native Mobile App Developer for Clothes Shop Mobile App ✅ React Native Mobile App Developer for School Mobile App ✅ React Native Mobile App Developer for Online Learning Mobile App 🕒 I'm available for both part-time and full-time projects, and I'm flexible with different time zones. Keywords: Mobile App Development, Android App Development, iOS App Development, Flutter, React Native, Kotlin, Swift, SwiftUI, Dart, Objective-C, Java, Typescript, API Integration, UI/UX Design, Figma, API Development, SDK Development, Payment Gateway Integration, Mobile UI Design, UI/UX Prototyping, UI Graphics, UX Research, GPS Integration, Push Notifications, Firebase (Auth, Realtime Database, Hosting, Firestore, Cloud Functions, Push Notifications, Config), GraphQL, Redux, Redux Saga, Xcode, Android Studio, IntelliJ IDEA, Bitbucket, GitHub, Gitlab, JIRA, Trello, BaseCamp, Postman, Heroku, NodeJS, JavaScript, ReactJS, PHP, Laravel, Python, Django, Machine Learning, Artificial Intelligence (AI), Internet of Things (IoT), Amazon Web Services (AWS), S3, CDN (Cloudfront), DynamoDB, MongoDB, PostgreSQL, MySQL, NoSQL
    Featured Skill React Native
    Mockup
    UI Graphics
    UI/UX Prototyping
    UX & UI
    Mobile App Design
    Flutter Stack
    Native App
    Mobile App Bug Fix
    Mobile App Improvement
    AI Mobile App Development
    Mobile App Development Consultation
    Flutter
    Mobile App Development
    Native App Development
  • $80 hourly

    • 5.0/5
    • (17 jobs)
    I am a result-oriented full-stack software engineer with valid experience in design, development, and testing across mobile, web, protocols and APIs. My journey in the world of development began 2014, and since then, I've immersed myself in various technologies, with a primary focus on JavaScript and PHP and mobile development. Technical Expertise: Front-End: I specialize in crafting seamless and user-friendly front-end experiences using modern JavaScript frameworks like React and Angular. My commitment to writing clean, modular, and scalable code ensures that the applications I build are not just functional but also maintainable. Back-End: On the server side, Node.js is my weapon of choice. I've architected and developed robust back-end systems, leveraging AWS, GCP, Node.js, TypeScript and PHP. Database Design: I possess strong expertise in database design and management, having worked extensively with both SQL (MySQL, PostgreSQL) and NoSQL (MongoDB) databases. My skills extend to optimizing database performance and ensuring data integrity. Mobile Applications: I'm well-versed in the mobile application development using frameworks like ReactNative, SwiftUI and Flutter. I've created and published 5+ applications to apple and google stores so far. Why Work With Me: Passion for Learning: I thrive on keeping up with the latest industry trends and technologies. Continuous learning is not just a professional goal but a personal commitment. Problem-Solving Mindset: I approach challenges with a problem-solving mindset, breaking down complex issues into manageable tasks and delivering effective solutions. Effective Communication: Communication is key to successful projects. I pride myself on my ability to convey technical concepts to both technical and non-technical stakeholders. I'm always excited to explore new opportunities, collaborate on innovative projects, and connect with fellow developers and industry professionals. I'm looking forward to the next exciting chapter in my journey, and I would love for you to be a part of it.
    Featured Skill React Native
    Amazon Web Services
    Django
    Python
    FlutterFlow
    API Integration
    MongoDB
    PostgreSQL
    MySQL
    Vue.js
    Next.js
    React
    Node.js
    TypeScript
    JavaScript
  • $80 hourly

    • 5.0/5
    • (3 jobs)
    As a seasoned Senior Mobile Developer with over a decade of experience in the fast-evolving mobile app development landscape, I have honed an extensive skill set across a wide array of technologies including React Native, Flutter, Swift, Java, Kotlin, and more. My career has been marked by a commitment to excellence, innovation, and a proactive approach to embracing new technologies and methodologies. Throughout my extensive career in mobile application development, I've consistently pushed the boundaries of what's possible, leveraging cutting-edge technologies and methodologies to deliver outstanding results. My key achievements reflect a blend of technical innovation, strategic leadership, and a deep commitment to user experience: - Revolutionized cross-platform app development by spearheading projects that seamlessly integrated cutting-edge features like real-time messaging, payment integrations, and augmented reality, resulting in a 40% increase in user engagement and opening new revenue streams. - Transformed application performance through targeted optimizations, achieving a 30% reduction in load times and a 50% enhancement in responsiveness, which significantly improved user retention rates and app ratings. - Elevated code quality and reliability by leading the implementation of comprehensive unit and UI testing frameworks, achieving over 90% coverage and drastically reducing post-launch bugs and user-reported issues. - Accelerated development cycles and improved efficiency by pioneering the adoption of CI/CD pipelines and Agile practices, reducing time-to-market by 25% and fostering a culture of continuous improvement and innovation within the development teams. - Drove collaborative success with cross-functional teams, playing a pivotal role in the ideation, design, and launch of feature-rich applications. My leadership in adopting and advocating for modern architectural patterns and programming paradigms such as MVP, MVVM, and reactive programming significantly enhanced project scalability and maintainability. My approach to mobile development is user-centric and data-driven, focusing on creating seamless, intuitive, and innovative applications that meet and exceed user needs. With a proven track record of success, I am passionate about leveraging my skills to tackle new challenges and contribute to the success of dynamic, forward-thinking teams.
    Featured Skill React Native
    Firebase
    Mobile App Development
    Android
    iOS
    Dart
    FlutterFlow
    Kotlin
    Java
    Flutter
    Swift
  • $60 hourly

    • 5.0/5
    • (3 jobs)
    I am a certified full-stack web & mobile developer with 10 years of experience creating optimized features for efficient products. I enjoy working with new technologies and approach new challenges creatively, with a problem-solving and owning mindset. I am particularly strong in Python, Java and TypeScript with a foundational understanding of UI/UX involving layouts and colors. I am experienced in working with the entire architecture of a web & mobile application at every level and takes pride in using my experience to create reliable, scalable, and robust solutions to overcome a wide array of issues.
    Featured Skill React Native
    Python
    Git
    AWS Development
    MongoDB
    Node.js
    Angular
    React
    TypeScript
    Java
    Swift
    Web Development
    Android App Development
    iOS Development
    Web Application
  • $60 hourly

    • 5.0/5
    • (5 jobs)
    🏆 Senior Full Stack Engineer, Mobile & QA Automation Engineer 🏆 Hello! I’m Tanner, a seasoned software engineer with over 7 years of professional experience. I specialize in building high-performance mobile and web applications, and I also have a strong background in QA automation. My expertise spans across React Native, React.js, Python, Node.js, and C#, as well as web automation using Selenium, Cypress, and Playwright. I’m passionate about delivering scalable, reliable, and user-friendly applications, and ensuring high-quality user experiences through automated testing. 🌟 Expertise in Mobile, Full Stack & QA Automation Development I’ve built intuitive, scalable applications leveraging React Native, React.js, Node.js, and Python. In addition, I am highly skilled in QA automation for web applications, especially in automated testing frameworks that ensure high-quality, bug-free releases. I have developed custom test scripts for web applications, optimized C# code for Selenium integration, and worked closely with teams to implement efficient testing processes across CI/CD pipelines. 🌐 End-to-End Mobile, Web & Automation Testing Solutions From mobile app development, API integrations, and eCommerce platforms like Shopify and WordPress, to developing automated testing frameworks and providing end-to-end QA solutions, I provide comprehensive development and testing solutions that ensure applications perform smoothly across environments. Key Skills & Expertise: ✅ QA Automation: C#, Selenium, Playwright, Cypress, Jest, React Testing Library ✅ Mobile Development: React Native, Expo, Flutter ✅ Frontend Development: React.js, Angular, TypeScript, Redux, RxJS ✅ Backend Development: Node.js, Express.js, RESTful APIs, GraphQL, Python ✅ Website Development: WordPress, Shopify, HTML5, CSS3, JavaScript ✅ Cloud Platforms: AWS (Lambda, S3, EC2, DynamoDB), Google Cloud, Azure ✅ Machine Learning: TensorFlow, Scikit-learn, Keras, PyTorch ✅ DevOps & CI/CD: Docker, Kubernetes, Jenkins, AWS CodePipeline ✅ Performance Monitoring: Datadog, CloudWatch, Splunk ✅ API Integration: Payment Gateways, Geolocation Services, Push Notifications ✅ Software Security: OAuth 2.0, JWT, Encryption Protocols ✅ UI/UX Optimization: Material UI, Ant Design, Figma Prototypes ✅ Agile Development: Scrum, Kanban ✅ Version Control: Git, GitHub, Bitbucket ✅ Testing & QA: Selenium, Jest, Cypress, Detox ✅ Cross-Platform Development: iOS, Android, PWA (Progressive Web Apps) ✅ Real-Time Features: WebSockets, SignalR ✅ Serverless Architecture: AWS Lambda, Firebase Functions 💼 A Developer Who Delivers Over the years, I’ve led teams and worked collaboratively with clients to deliver scalable, secure, and user-friendly mobile applications, websites, and eCommerce solutions. I specialize in automated testing, having created robust test automation frameworks for web applications, including end-to-end UI, API, and performance testing. My work ensures that CI/CD pipelines are fully integrated, and applications meet the highest standards of quality and performance. Why Choose Me? Proven QA Expertise: I bring expertise in automated testing (Selenium, Cypress, Playwright) to create reliable, repeatable tests for web applications. Full Stack & Mobile Proficiency: My cross-platform expertise ensures your projects are scalable and future-proof, whether it’s web development or mobile app development. Efficient Automation: I focus on optimizing test execution times, scalability, and maintainability of the automation frameworks I build. Continuous Learning: I stay up to date with industry trends and emerging testing tools to ensure the best quality standards and innovation. Let’s collaborate to build cutting-edge applications that not only meet your business needs but also maintain the highest quality standards. I’m excited to help you automate testing and ensure bug-free releases for your products. Feel free to reach out. Let’s turn your vision into reality!
    Featured Skill React Native
    HTML5
    Mobile App Design
    RESTful API
    JavaScript
    Node.js
    iOS Development
    Swift
    Android App Development
    Software Design
    WordPress
    Web Development
    Java
    Mobile App Development
    Mobile App
  • $75 hourly

    • 5.0/5
    • (3 jobs)
    I have 10+ years of experience in web and mobile development, automation, and AI/ML model integration. Especially, I have a strong background in using JavaScript and Python frameworks like Node.js, React, and Vue.js, Django, Flask, FastAPI to build scalable and efficient web applications. I am also well-versed in .NET and experienced with FlutterFlow. Throughout my career, I’ve collaborated closely with cross-functional teams, contributing to successfully delivering complex projects. My teamwork experience includes working with developers, designers, and product managers to ensure seamless integration and alignment with project goals. I’m consistently going the extra mile to ensure projects are completed on time and to the highest standard. Technical skills: Languages & Frameworks: - Python (Django, Flask, FastAPI) - JavaScript (React/Next.js, Vue.js/Nuxt.js) - C# (.NET, ASP.NET, ASP.NET Core, .NET API) - Node.js (Express, NestJS) - PHP (Laravel, Drupal) - HTML5, CSS3 - TypeScript Database Management: - SQL (PostgreSQL, MySQL) - MSSQL - NoSQL (MongoDB, DynamoDB) - ORM (SQLAlchemy, Sequelize) Cloud & DevOps: - AWS (EC2, S3, RDS, Lambda, CloudFront) - Azure - Containerization (Docker, Kubernetes) - CI/CD (Jenkins, GitLab CI, AWS CodePipeline) API Development & Integration: - RESTful API - GraphQL - API Security (OAuth, JWT) Mobile Development: - React Native - Flutter & FlutterFlow Version Control & Collaboration: - Git (GitHub, GitLab, Bitbucket) - Agile Methodologies (Jira, Trello) Testing & Debugging: - Automated Testing (PyTest, Jest, Mocha, Cypress) - Debugging & Profiling (Chrome DevTools, Postman, AWS CloudWatch) SEO - SEO optimization - Technical SEO audits - On-page SEO - Keyword research - Link-building strategies
    Featured Skill React Native
    API Integration
    API Development
    API
    Amazon Web Services
    DevOps
    GraphQL
    MongoDB
    ExpressJS
    Node.js
    Next.js
    React
    TypeScript
    JavaScript
  • $125 hourly

    • 4.7/5
    • (39 jobs)
    🏆 Mobile Game & App Development Expert 🏆 30+ Years in Game Development & Mobile Apps 🏆 Specialist in AI, AR/VR, and Web3 Technology 🏆 Proven Success as a Startup Founder 🏆 100% Project Completion Rate Seeking a skilled mobile game developer or app development expert to bring your ideas to life? Your search ends here. I’m Josh Rose. My mission is to empower businesses, startups, and entrepreneurs to excel in the ever-evolving world of mobile games and mobile apps. With over 30+ years of experience and backed by a team with a deep understanding of the latest technology, I bring the insights and expertise needed to navigate challenges and seize opportunities in this competitive market. Together, we are committed to delivering exceptional quality on every project, big or small. Why Choose My Services for Mobile Game & App Development? 🚀 Comprehensive Full-Cycle Mobile Game & App Development 🚀 Experience with 100+ Software Projects, Including AAA Games 🚀 Proven Team of Mobile Game and App Developers 🚀 Dedicated to Delivering High-Quality Products and Services 🚀 Commitment to Client Success and Satisfaction Core Mobile Game & App Development Expertise ⭐️ Mobile Game & App Development from Ideation to MVP and Beyond ⭐️ Fullstack Mobile Development | Unity | Unreal Engine | AR/VR | Web3 ⭐️ Cross-Platform: Android Development (Google Play, Amazon) & iOS Development (Apple Store) & Oculus ⭐️ User Experience Design for High Engagement and Retention Rates ⭐️ Advanced AI, AR/VR, and Web3 Integration ⭐️ CI/CD for Efficient Mobile App Testing and Launch ⭐️ Expertise in App Store Optimization (ASO) and Monetization ⭐️ Development of AR/VR Simulations and Training Products ⭐️ Third-Party API & SDK Integration for Enhanced Functionality ⭐️ Version Control with Git and Plastic SCM ⭐️ Cloud Database Solutions with AWS, Firebase, MongoDB, MySQL, PostgreSQL, SQLite Popular Mobile Game Genres I Develop Educational Games for Kids | MMO | Puzzle Games | Casual Games | Strategy Games | Arcade Games | MMORPG | Indie Games | Hyper-Casual Games | Multiplayer | Card Games | Board Games | Turn-Based Games | NFT Games Mobile App Genres I Specialize In Photo & Video Apps | Voice/Video Chat Apps | eCommerce Apps | Health & Fitness Apps | Travel & Geolocation Apps | Web3 & Blockchain Apps | Marketplace Apps | Real Estate Apps | Social Networking Apps | Chatbot Apps | AI/ML Apps | Educational Apps | Messaging Apps Supported Platforms for Mobile Apps & Games ✅ Android Development (Google Play, Amazon) ✅ iOS & MacOS Development (Apple Store) ✅ WebGL for Web-Based Applications and Games ✅ Oculus Applications and Games Technical Skills Frontend Development: React Native, TypeScript, JavaScript, AngularJS Backend Development: PHP, Laravel, Node.js Game Engines: Unity, WebGL Analytics & Databases: Google Analytics, MongoDB, MySQL, PostgreSQL, SQLite Cloud Services: AWS, Firebase
    Featured Skill React Native
    Blockchain
    Oculus Rift
    Gaming NFT
    WebGL
    Game Design Document
    Desktop Application
    Game Development
    Game Design
    Ecommerce Website Development
    Product Development
    Artificial Intelligence
    API
    Firebase Cloud Firestore
    Firebase
    Objective-C
    React
    Review or Feedback Collection
    Map Integration
    Native App Development
    iOS Development
    Smartphone
    Android
    iOS
    Mobile App Development
  • $50 hourly

    • 5.0/5
    • (26 jobs)
    Hi, As a highly skilled Full Stack Developer with a wealth of experience in creating exceptional websites, web apps, and mobile apps, I would like to introduce myself: Throughout my career, I have successfully built and delivered a wide range of projects, showcasing my expertise in developing high-quality and responsive mobile sites. I am well-versed in creating cross-browser-compatible eCommerce Systems, CMS, and custom web portals, web applications, and mobile apps that provide seamless user experiences across different devices. Having had the opportunity to work on a diverse range of projects throughout my career, I have developed a deep appreciation for the importance of crafting interfaces that not only look great but also provide a seamless user experience. I firmly believe that the fusion of aesthetics and usability is key to creating remarkable digital solutions. In addition to my passion for creating engaging interfaces, I thrive in long-term collaborations. Building strong and lasting relationships with clients is one of my top priorities, as it allows for a better understanding of their needs and enables me to deliver solutions that truly align with their goals. I bring a flexible approach to my work, including my willingness to adapt my working hours to accommodate team needs. I thrive in collaborative environments and genuinely enjoy working with diverse teams, leveraging collective strengths to deliver outstanding outcomes. I would be thrilled to contribute my skills, experience, and dedication to your team and projects. I look forward to hearing from you!
    Featured Skill React Native
    Shopify
    Mobile Game Development
    RESTful API
    Node.js
    Swift
    Mobile App Development
    MongoDB
    Vue.js
    Website Redesign
    iOS Development
    React
    Kotlin
    Android App Development
    Native App Development
  • $45 hourly

    • 4.9/5
    • (46 jobs)
    🌟 Elevate Your Project with an Upwork Expert-Vetted Developer! 🌟 Are you looking for a top-tier developer who enhances user experiences, maximizes ROI, and speeds up product launches? Do you appreciate clear communication and an unwavering dedication to success? Your search ends here—I’m ready to bring your vision to life. 🔥 Upwork Expert-Vetted: Ranked among the top 1% of freelancers, recognized for outstanding skills and professionalism. 🔥 Experienced Software Engineer: Holding a Master’s in Computer Science with over a decade of expertise in web and mobile development. 🔥 CTO at Code & Cakes: Leading a globally recognized agency with a flawless 5-star rating on Clutch. 🔥 Ex-Founding Engineer at a Y Combinator-backed startup: Contributed to a successful exit. 🚀 What I Offer: • Full-Stack Proficiency: Skilled in JavaScript, TypeScript, ReactJS, NextJS, Node.js, NestJS, Golang, Rust, Python, and beyond. • Fast Learner: Quick to adopt new technologies, always staying ahead of industry trends. • Reliability & Accuracy: Ensuring high-quality, on-time delivery. • Strategic Thinker: Always asking “Why?” and “What’s the purpose?” to drive the best results. 🔧 Technical Expertise: • Programming Languages: JavaScript, TypeScript, Golang, Rust, Python, Solidity, Bash, HTML5, CSS3, SQL • Frontend: ReactJS, NextJS, Vue3, NuxtJS, Angular, Svelte, Tailwind, Mantine, Sass, Web3.js • Backend: Node.js, Express, NestJS, Loopback, Django, GraphQL, gRPC, REST API • Databases: PostgreSQL, MySQL, Redis, Clickhouse, MongoDB, Firestore, Apache Cassandra • Mobile Development: React Native, Flutter, Android, iOS • Infrastructure & DevOps: AWS, Azure, GCP, Firebase, Docker, Kubernetes, Terraform, Jenkins, Git • AI/ML: OpenAI GPT-4/GPT-o, Anthropic, AWS Bedrock, TensorFlow, PyTorch, Machine Learning, Data Science • Blockchain: Ethereum, Solidity, Web3.js, NFTs, DeFi, Cryptocurrency • Cybersecurity: Ethical Hacking, Penetration Testing, Secure Code Review 📣 Keywords: Senior Software Engineer, Full Stack Developer, AI Developer, AI Engineer, AI App Developer, AI Agent Developer, AI Bot Developer, Machine Learning Engineer, Data Scientist, Software Engineer, Backend Developer, Frontend Developer, DevOps Engineer, Cloud Engineer, Mobile Developer, Web Developer, Blockchain Developer, Cybersecurity Engineer, Ethical Hacker, Penetration Tester, Natural Language Processing Engineer, Computer Vision Engineer, Deep Learning Engineer, Reinforcement Learning Specialist, Predictive Analytics Specialist, AI Model Integration Specialist, API Integration Specialist, Cloud Infrastructure Engineer, Site Reliability Engineer, Android Developer, iOS Developer, AI Researcher, Automation Engineer, JavaScript, TypeScript, Python, Golang, Rust, ReactJS, NextJS, Vue3, Angular, Svelte, Node.js, NestJS, NX/JS, Express, Loopback, Django, GraphQL, gRPC, REST API, PostgreSQL, MySQL, Redis, MongoDB, Firestore, Apache Cassandra, Docker, Kubernetes, Terraform, AWS, GCP, Azure, Firebase, Jenkins, Solidity, Ethereum, Web3.js, NFTs, DeFi, Blockchain, Blockchain Development, TensorFlow, PyTorch, OpenAI, GPT-4, AWS Bedrock, Anthropic, AI App Development, AI Development, AI Agent Development, AI Bot, AI Model Integration, AI-Generated Code, Natural Language Processing (NLP), Computer Vision, Neural Networks, Deep Learning, Reinforcement Learning, Supervised Learning, Unsupervised Learning, Ethical AI, Predictive Analytics, Cybersecurity, Ethical Hacking, Penetration Testing, React Native, Flutter, Android Development, iOS Development, API Integration, Web Development, Mobile Development, Stripe, Git, Chatbot Development, BigCommerce, Ecommerce Website, HTML5, OpenAI API, LLM Prompt Engineering, Model Training, Java, Android App Development, Smartphone, Shopify, Firebase Realtime Database, Database Architecture, Web Application, Prototyping, HIPAA, Compliance, Information Security, Shopify Apps, Shopify Templates, Shopify Plus, Shopify Theme, Full-Stack Development, Artificial Intelligence, Machine Learning. 🎯 Let’s Build Something Great: Ready to take your project to the next level? Reach out, and let’s exceed expectations together. Leverage an Upwork Expert-Vetted Developer to bring unmatched value to your project!
    Featured Skill React Native
    ChatGPT
    Microsoft Excel
    API Integration
    Web Application
    Next.js
    Chatbot Development
    API
    Artificial Intelligence
    Python
    React
    Web Development
    TypeScript
    JavaScript
    Node.js
  • $70 hourly

    • 4.9/5
    • (48 jobs)
    "Joseph is an outstanding professional and an exceptional developer. He delivered top-notch work without any hassle. I highly recommend him for any project!" - Abdel Z "Highly recommend him. He finished our project in a timely manner. Quickly adapted when we needed him to. We will definitely reach out to him for expansions in the future." - Joshua S "Awesome job! Delivered exactly what we needed with a really quick turnaround. Great communication skills—all around pleasure to work with. Highly recommend." - Michael M ⭐ Here’s what I can bring to your project ⭐ ✅ Writing composable code with React hooks API ✅ Server-Side Rendering with Next for apps that can’t be just SPAs ✅ Eye for design to build a better product ✅ Feature organization without overengineering ✅ Clean code that is easy to read and maintain ✅ Avoiding common mistakes with TypeScript ✅ Test-Driven Development for crucial components ✅ Optimizing user interfaces for a better user experience ⭐ What’s different compared to other freelancers ⭐ ✅ Trust: I focus on providing value to all of my clients and am always transparent about my processes ✅ WOW Factor: this is core to my work as a freelancer. I strive to give more than what I receive to ultimately make you happy about working with me and choosing to hire me again ✅ Responsiveness: frequent updates along with timely replies without fail ✅ Genuine: I’m rooting for your success. It makes both human and business sense — knowing I’ve helped you succeed, you’ll come back to purchase more of my services! But I’ve got to tell you I’m not a fit for everyone and some signs may include: ⛔️ You think you can get someone else to do it cheaper ⛔️ You’re not willing to adapt based on fresh information found during the work process ⛔️ You think freelancers are beneath you ⛔️ You don’t appreciate the full process that goes into creating great software READY TO GET STARTED? NEXT STEPS: 1. Invite me to your job 2. I will send my proposal 3. We’ll iron out all the requirements and expectations 4. I’ll get the work done professionally to ensure you love the end result 5. You’ll leave an awesome review at the end 😎
    Featured Skill React Native
    Mobile App Development
    Web Development
    Responsive Design
    Node.js
    Redux
    Next.js
    React
    TypeScript
    JavaScript
  • $80 hourly

    • 4.8/5
    • (36 jobs)
    I am an expert mobile app developer in the top 1% of contractors on Upwork. Using React Native, I create well-designed, beautiful cross-platform mobile apps. I love React Native and have been using it to develop a variety of apps for clients ever since it came out. I am a computer science graduate from Azusa Pacific University, and won the hackathon there for one of the apps I made with React Native in under 72 hours. I am easygoing and enjoy working on interesting projects on the cutting edge of technology. I like working with other people, trying to bring their vision for apps to come to life. My most common workflow is Trello, Slack, Github, VSCode, Powershell, Expo, React Native, Firebase. I post daily updates on my progress, as well as over-the-air updates so that you can physically see on your device the progress being made. I always write out clear proposals before committing to working on a project. My code is almost always re-usable, which allows me to make new apps much quicker. At this point I basically have my own library of components to build with. React Native itself allows modular code reuse which helps with this. I've built apps from scratch for clients lots of times, and each time I get better at it. I can give accurate estimates and recommendations because of this. There's also some neat coding tricks I've picked up along the way. I am very flexible with time schedules, app requirements, and so on. The way I'm able to do this is by preferring firm-fixed price, and by starting with the smallest possible version. I enjoy making apps, so if you have an app idea and want it made, let me know and I'll do my best to help get it made. Whether that means me giving recommendations on how you can build it yourself, or me guiding a more junior developer I put you in contact with, or I end up giving a free consultation, I'd love to hear about your app and see if I can help.
    Featured Skill React Native
    Firebase
    JavaScript
    Expo.io
    SQLite Programming
    Redux
    Smartphone
    React
    Mobile App Development
    TypeScript
  • $33 hourly

    • 4.6/5
    • (66 jobs)
    Hi! I am a versatile developer with a passion for creating high-quality websites and mobile apps that deliver excellent user experiences. With expertise in WordPress, Shopify, Android, and iOS, I have helped businesses build dynamic websites, functional e-commerce stores, and sleek mobile apps that stand out from the competition. What I Can Do for You: Custom WordPress sites with seamless functionality and beautiful design Shopify stores that are easy to manage, optimized for conversions, and mobile-friendly Native Android and iOS apps that are intuitive, responsive, and feature-packed E-commerce solutions with secure payment gateways and smooth user flows Cross-platform solutions to reach more users and grow your business Ongoing support and updates to keep everything running smoothly I am always committed to delivering top-notch results, whether it's a simple website or a complex mobile app. Let’s bring your vision to life! Feel free to check out my portfolio for examples of my work, and I would love to chat about how I can help with your project.
    Featured Skill React Native
    Shopify
    WordPress
    API Development
    iOS Development
    Android App Development
    Swift
    Twilio API
    Ionic Framework
    Xamarin
  • $15 hourly

    • 4.9/5
    • (7 jobs)
    " Mohsin here, I can lead your hope from dream to Reality " ⚡️Little bit about me: I am Full Stack Developer with 8+ years of hands-on experience, I bring a powerful blend of technical expertise, creativity, and a deep understanding of user experience to deliver web and mobile applications. My specialization in React, Laravel, Node.js, Express, and Next.js allows me to craft scalable, and secure solutions to meet your specific business needs. ⚡️Skills for (Front-end Development) ◘ HTML ◘ CSS ◘ JavaScript ◘ TypeScript ◘ React ◘ React Native ◘ Angular ◘ Vue.js ⚡️Skills for ( Mobile App Development ) ◘ React Native ◘ Flutter ⚡️Skills for ( Back-end Development ) ◘ Node.js (Express.js, Nest.js) ◘ Python (Django, Flask) ◘ PHP (Laravel) ⚡️My skills ( Cloud Server Management ) ◘ AWS ◘ Google Cloud ◘ Heroku ◘ DigitalOcean ⚡️Skills for ( Version Control ) ◘ Git ◘ GitHub ◘ Bitbucket ⚡️Keywords: Full Stack Development,Mobile App Development,iOS Swift,Kotlin (Flutter),React Native,Front-end Development,Back-end Development,Node.js,Express,Django,Database Management (MySQL, MongoDB),API Integration,Responsive Design,Cross-platform Development,Top Rated Plus,Project Management,Agile Methodologies,User Experience (UX),Web Solutions,Collaboration and Communication,PHP,Laravel,Flutter,evops,ML,AI ⚡️Why Engage My Service: Whether you require a comprehensive web solution or an exceptional mobile app in iOS Swift, Android Kotlin, or cross-platform with React Native, I am poised to transform your concepts into reality. Let's initiate a conversation about your project and elevate it to unparalleled heights with my expertise in Full Stack Development and Mobile App Mastery. 📞 Feel free to contact me anytime to help grow your business; I will exceed your expectations. 🙌 Thanks.
    Featured Skill React Native
    WordPress Customization
    API
    Landing Page Design
    Web Design
    Flutter
    MongoDB
    API Development
    Next.js
    API Integration
    JavaScript
    React
    Vue.js
    Laravel
    Responsive Design
  • $80 hourly

    • 4.7/5
    • (206 jobs)
    𝗜𝘀 𝘆𝗼𝘂𝗿 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 𝗰𝗼𝘀𝘁𝗶𝗻𝗴 𝘆𝗼𝘂 𝗺𝗼𝗻𝗲𝘆 𝗮𝗻𝗱 𝗰𝗮𝘂𝘀𝗶𝗻𝗴 𝘀𝗹𝗲𝗲𝗽𝗹𝗲𝘀𝘀 𝗻𝗶𝗴𝗵𝘁𝘀? Let’s turn that stress into success. With over 20 years of experience as a seasoned FinTech leader and Global CTO specializing in 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 𝗜𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻, 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, and 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴, a proven track record awaits you. Payment systems have been built and optimized to not only meet today's demands but also scale with your business tomorrow—delivering over 𝗨𝗦𝗗 𝟮𝟬𝗠 𝗶𝗻 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗳𝗼𝗿 𝟭𝟬+ 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 and powering 200+ successful app launches worldwide. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲: 𝟭. 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Mastery in integrating 𝗦𝘁𝗿𝗶𝗽𝗲, 𝗦𝘁𝗿𝗶𝗽𝗲 𝗖𝗼𝗻𝗻𝗲𝗰𝘁, and other payment gateway APIs, ensuring secure, efficient, and scalable payment systems. 𝟮. 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 & 𝗧𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗟𝗼𝗴𝗶𝗰: Proven expertise in handling recurring payments, multi-invoice payments, partial payments, and complex scenarios like payment failures, refunds, and voiding transactions. 3. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝘆: Adept at leading cross-functional teams, communicating with C-level executives, and transforming technical challenges into robust, revenue-generating solutions. 𝟰. 𝗛𝗮𝗻𝗱𝘀-𝗢𝗻 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Whether you’re dealing with broken software systems or planning a complete digital transformation, startups and enterprises alike have seen at least a 𝟭𝟬% 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁 𝗶𝗻 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗮𝗻𝗱 𝗽𝗿𝗼𝗳𝗶𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 through these solutions. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 𝗶𝗻 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴: Leveraging cutting-edge payment processing protocols — 𝗣𝗖𝗜-𝗗𝗦𝗦 𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲, 𝘁𝗼𝗸𝗲𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗲𝗻𝗰𝗿𝘆𝗽𝘁𝗶𝗼𝗻, and 𝟯𝗗 𝗦𝗲𝗰𝘂𝗿𝗲 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻𝘀 — ensures sensitive data is safeguarded and fraud risks are mitigated. Expertise in configuring 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, 𝗦𝗲𝘁𝘂𝗽 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, and utilizing 𝘄𝗲𝗯𝗵𝗼𝗼𝗸𝘀 for real-time event handling optimizes 𝗦𝗖𝗔 flows, manages decline handling and chargebacks, and ensures seamless reconciliation across multiple payment channels. A deep understanding of card network rules, risk management strategies, and automated dunning processes guarantees that payment operations remain both resilient and highly efficient. 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗜𝗻-𝗔𝗽𝗽 𝗣𝘂𝗿𝗰𝗵𝗮𝘀𝗲 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴: Extensive experience with 𝗶𝗻-𝗮𝗽𝗽 𝗽𝘂𝗿𝗰𝗵𝗮𝘀𝗲 systems on both 𝗚𝗼𝗼𝗴𝗹𝗲 𝗣𝗹𝗮𝘆 and 𝗔𝗽𝗽𝗹𝗲 𝗔𝗽𝗽 𝗦𝘁𝗼𝗿𝗲 platforms complements robust payment gateway integrations. Successfully blending these in-app purchase mechanisms with 𝗦𝘁𝗿𝗶𝗽𝗲 creates a unified payment ecosystem that supports subscriptions, one-time purchases, and cross-platform transactions. Notable projects include 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗹𝘆 and 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽, where in-app purchase flows were seamlessly integrated with backend payment processing to optimize revenue and enhance user experience. 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀: 𝟭. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗜𝗺𝗽𝗮𝗰𝘁: Solutions delivered have scaled workforces and revenues — streamlining processes and reducing monthly costs dramatically (e.g., cutting costs from $𝟭𝟲𝟬,𝟬𝟬𝟬 𝘁𝗼 $𝟱𝟬,𝟬𝟬𝟬). 𝟮. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻: Engagements have doubled revenue for companies like 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽 and contributed to a 𝟵𝟵.𝟲% 𝗰𝗿𝗮𝘀𝗵-𝗳𝗿𝗲𝗲 𝗿𝗮𝘁𝗲, leading to over 𝟭𝟬,𝟬𝟬𝟬 𝗱𝗼𝘄𝗻𝗹𝗼𝗮𝗱𝘀 and high user ratings. 𝟯. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻 & 𝗔𝗴𝗶𝗹𝗶𝘁𝘆: Continuously integrating the latest tools—from 𝗔𝗜 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻𝘀 like ChatGPT and DeepSeek to advanced mobile app development frameworks — ensures clients remain ahead of the curve. 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? Partner with an expert who delivers tangible results, allowing you to focus on business growth. If you're ready to stop wrestling with payment integration issues and start experiencing streamlined, profitable operations, let's connect. Book a Consultation Today.
    Featured Skill React Native
    Enterprise Architecture
    Internet of Things
    Solution Architecture
    Agile Software Development
    Software Consultation
    Mobile App Development
    RESTful Architecture
    Amazon Web Services
    Firebase
    In-App Purchases
    JavaScript
    Flutter
    Android App Development
    iOS Development
  • $119 hourly

    • 5.0/5
    • (22 jobs)
    I am a software developer with over ten years of experience creating high-quality digital products that customers love. I am an effective communicator and team members appreciate my ability to turn complex problems into actionable steps. I am very self-driven, solution-orientated, and eager to step in where I am needed most to help a company scale and grow.
    Featured Skill React Native
    Unity
    Python
    PostgreSQL
    Kotlin
    Django
    Google Cloud Platform
    iOS
    Redis
    React
    ExpressJS
    Node.js
    Amazon Web Services
  • $100 hourly

    • 5.0/5
    • (9 jobs)
    I fix overseas mistakes. Seriously I am appalled by people who think cheap = good. In the AI space I led the development team at CAMFIND (two million downloads) and TAPTAPSEE which uses AI for image recognition and now image captioning in real time. I also created Predictive Chat which mimics human like chat for the mortgage and lease renewal industry (sold to YTEL). Now I am working at SOUNDIMAGE.AI where I am using LLMs and generative AI models for flawless lipsynching, dubbing and other media tools. I am proficient in data science and data scraping. Former CTO of three start-ups. One was an app acquired by Amazon (SHOPPLER) and the other in the AI space (Cloudsight.ai). I also have excellent experience with video streaming. Most of the clients I have worked with thus far on this site had tried the cheap route abroad and I fixed them. I have worked at the several well known companies such as FANDUEL and TJMAXX. I was the lead app developer at the prestigious XPRIZE. I have created three apps that have had more than 1 million downloads. This means I can build robust apps that scale. I am here on Upwork because that's how I found one of the start-ups I have worked at that have had a great exit. I am a senior iOS/Android app developer with actual apps on the app store. I have excellent references and am local. I have several apps that have crossed the 100k+ download threshold and at least three that are 1Million+. I do not outsource overseas, and I am available to meet in the SoCal area as needed. I will work with you from inception of your app idea to launch on the app store or I can solve bug fixes as well. Hire me if you are looking for a serious person who will bring a CTO mentality of getting things done, someone with over 20+ years of problem-solving. Please do not let my hourly rate frighten you (it is there to eliminate non-serious offers). My skills are - Proficient with SwiftUI as well as React Native/Flutter to create hybrid or cross platform apps - iPhone,iPad, WatchKit App Development with SwiftUI, Objective C and Swift/XCode. - Android development with Android Studio and Kotlin -Streaming with MUX, Agora, Wowzaa - Bluetooth Low Energy, iBeacon - Integration of PayPal or Stripe SDK - Integration of Barcode scan/WalletPasses - Core Animation - Push Notification (APNS, GCM) - Storyboard, AutoLayout - iOS Keyboard Customization - Integrating in-app purchase - Integrating iAd and Admob - UI design of iOS and Android app - Video/Audio processing - Google Map Service, Apple Map Service, Geo Location - Camera/Photo manipulation stitching - Chatting by XMPP Framework - Callkit (Voip for apps) - Managing databases (MONGO, NoSQL, SQLite, Core-Data Model) - Working with Github, Bitbucket - Integration of Social Networking (Facebook, Twitter, Instagram, Youtube...) - Video/Audio Streaming, Video Editing, Decoding/Encoding -NodeJS -Mongo/PostGres - React. Vue, Next - Web Service, Ajax, XML, JSON - Back end admin panel -Piano integration -RevenueCat In the blockchain space I was the lead developer for VIBEHUT and DESOFY Thank you for your time and consideration.
    Featured Skill React Native
    iOS Development
    Mobile App Development
    Android
    Xamarin
    Objective-C
    Swift
    Android App Development
    Flutter
    Product Development
    Wireframing
    Computer Vision
    iPhone UI Design
  • $45 hourly

    • 4.7/5
    • (50 jobs)
    ⭐⭐⭐⭐⭐ Top 1% Developer on Upwork 🏆 🏆 🏆 🏆 🏆 Top 2023 AI Company 1️⃣8️⃣ Years of Experience | Looking for a dedicated, reliable team or a powerhouse developer? Your quest ends here! Welcome to my profile🚀 ⭐Top Rated Plus Upwork Contractor ⭐Spearheading one of the Top AI Companies on Upwork ⭐Partnered with over 50 Upwork clients, successfully executing more than 50 high-quality projects. Leveraging 18 years of experience in web development and 8 years in team leadership, I specialize in crafting seamless, performant interfaces and websites that drive tangible results. Skills I bring to the table🧩: • Mastery in ReactJS, Redux, GraphQL, NextJS, GatsbyJS, VueJS. • Expertise in JavaScript (ES6-ES8), TypeScript. • Proficient in Redux, Redux-Saga. • Experienced in NodeJS, Express, NestJS, NextJS. • Database knowledge: MongoDB, PostgreSQL, MySQL. • Skilled in Scss, Sass, PostCSS, HTML5, CSS3. • Building maintainable design systems with Storybook. • Client-side performance including AMP and PWA apps. • Expertise in Accessibility, 508 Compliance, SEO Optimization. • Cross-browser/cross-platform testing. • Automation QA: Cypress, Puppeteer, Playwright, Jest, Selenium. • Proficient in tooling: Webpack, Git, NPM. Happy Clients Speak📣: "Bernardo and his team bent over backward for this project. The project management and execution were awesome. We will definitely use them again." - Occam Tech "Bernardo is the best front end developer we've worked with. Was a pleasure working with him and will plan on continuing to do so." - Novo "Bernardo has been a pleasure to work with. Will continue to utilize him in future projects when the needs arise." - Cellular Outfitter My Services Include💼: • Dedicated team or a single engineer with a project manager • End-to-end software development • Building robust Design Systems for a consistent UI experience • Automation and manual testing for a bug-free application My Agile Process✅: Understanding your requirements and creating a project roadmap. Weekly sprints, with QA for each feature implemented. Continual Deployment for instant review of changes. Regular updates to keep you in the loop! Ready to unlock the power of AI for your business with a seasoned web architect? Let's talk📞
    Featured Skill React Native
    Prompt Engineering
    Chatbot
    GPT-4
    Conversational AI
    Bot Development
    Artificial Intelligence
    Node.js
    Shopify
    Stripe
    TypeScript
    Next.js
    NestJS
    React
    ChatGPT
  • $75 hourly

    • 5.0/5
    • (2 jobs)
    I am a Front End | Full-Stack Web Developer with a computer science degree and experience with both hardware and software technologies. I have a true passion for solving human problems. In the past, I achieved this through providing hardware solutions. In the present, I write elegant code to make Internet a better place for people. PROFESSIONAL EXPERIENCE Languages: Javascript, Ruby, Java, HTML5/CSS3 Frameworks/ Libraries: Rails, React-Redux, Material-UI, Node.js, Sass Database: PostgreSQL, MySQL, ActiveRecord Other: Git/Github, Heroku, webpack, AJAX, JSON, RESTful APIs, JSX
    Featured Skill React Native
    Android
    Sequelize
    ExpressJS
    TypeScript
    PostgreSQL
    Java
    Node.js
    JavaScript
    React
  • $195 hourly

    • 5.0/5
    • (24 jobs)
    Hi! I'm James, a Harvard Computer Science graduate, an ex-Googler, and CTO-level fullstack software engineer. I have 21 years of work experience, and can meet in-person if you’re in or near silicon valley. I believe that brilliance is good; reliability is better; and most important are integrity and compassion.. I help awesome people doing amazing things in the world; and I will deliver you delightful tech and tech leadership, on time, on budget, with full transparency and candor. I provide the following services: - Fractional CTO: I will work with you to clarify your visionary goals into an actionable technical roadmap; help you secure funding if necessary; and then run the technical operation start to finish. - Web and native app development: From napkin-sketch ideation to 7+ figure production, I will deliver intuitive, elegant digital experiences to your customers, from top-rated games and 3D virtual worlds to FDA compliant medical software, on the web and on devices. - Solving “unsolvable” tech problems. Examples of real projects I was engaged for: building a low power “hurricane proof” weather camera (Weather Channel); assisting with the development of the Semantic Reactor (a Google/Alphabet internal project); building a physical neural network entirely out of glass. - Technical project management: I will ensure your project runs on time and on budget, with incremental milestones and mitigated risks, using the best of Agile and PM tooling. I can manage teams large and small. - Productionalizing Research. Give me the research paper or the patent, I’ll make it real and scalable. - Consulting, with lawyers and attorneys, as a software engineering resource, for instance with respect to contracts and other legal matters (like Privacy Policies or GDPR/CCPA concerns). - Modernization of old technology: I will migrate and modernize your legacy application using the industry’s latest best practices. I have experience with performance tuning, scalability, devops, security hardening, penetration testing, and much more. - Teaching and coaching: I teach middle and high schoolers competitive coding. I enjoy tapping into every student’s life story and motivations. I also advise entrepreneurs and can act as a sounding board for personal and professional goals. - Solutions Architect: I provide comparative analysis of modern cloud technologies and explanations of how to use them for different scenarios. For example, I delivered a research paper to a private equity firm comparing Kafka, Kinesis, and other message queue technologies. The following are some of the technologies I have experience with: • Languages: Javascript/Typescript (ES6, ES7), C and C++, Java, Kotlin, Scala, Python, C#, Go / Golang, Rust • Analytics and Automation: make.com, Zapier, Twillio, Vercel, Airtable, Tableaux, Salesforce • Web: HTML5/CSS /SCSS/SASS/CSS-in-JS, React, Angular, WASM, 3js / three.js, Svelte, Astro, Vue.js, Qwik, Next.js, internationalization/i18n, localization l10n, accessibility/a11y • AI: PyTorch, TensorFlow, ChatGPT, GPT3 and GPT4, GAN (generative adversarial networks), Transformers, LSTM, RNN, belief networks / HMM • Mobile: ios (Swift and Objective-C), Android (Kotlin, Java) and DEX / Dalvik debugging, Google Play, App Store, React Native, expo • Geospatial: S3, H2, KD-tree, quadtree, ArcGIS, choropleths, NLP (including slack and discord chat bots) • MVP and Project Management: Figma, Trello, Jira, Agile, Scrum, Kanban • Testing and QA: JUnit, Jest, Mocha, Chai, Selenium, Puppeteer, Playwright, Cypress • Backend: NodeJS, Express, Django, flask, Tomcat, Spring, RabbitMQ • Infrastructure and DevOps: Docker, Kubernetes/k8s. GitHub Actions, CircleCI, Jenkins, Vercel, Netlify, Gatsby, Drone, Vagrant, Chef, Ansible, Terraform • Auth and InfoSec: auth0, oauth2, pentest, ISO 27001, GDPR, CCPA • Cloud tech: AWS, Azure, GCP, EC2, S3, Lambda, Kafka, Kinesis, AppSync, Spark, Storm, DataFlow, Hadoop • Databases: MySQL, Postgres, Firebase, Mongo, DynamoDB, Redis, NoSQL • Games / 3D: Unity, Unreal, OpenGL, webgl, photogrammetry, Meshlab, Blender, OpenCV • Embedded Tech: IoT, Raspberry Pi, Arduino, • Code Management: Github, Gitlab, Gerrit, Git, Svn • DevOps and Command Line: Bash, ZSH, Linux, PowerShell, Make, ImageMagick, FFMpeg, cron, GNU core tools
    Featured Skill React Native
    PyTorch
    NodeJS Framework
    TensorFlow
    Artificial Intelligence
    Unity
    Apache Kafka
    Raspberry Pi
    Scala
    Java
    Python
    JavaScript
    Android
    Bash Programming
    Enterprise Architecture
  • $59 hourly

    • 5.0/5
    • (4 jobs)
    I am a music producer, artist, mixing/mastering engineer, and audio engineer. I've always loved working with music, and I do so at a professional level. I work with industry standard products such as FL Studio, Omnisphere, Arcade, Waves, Retro Color, Keyscape, etc, so I can guarantee a variety of sounds that will make your project professional. When working on a new project, I like to discuss the project with my clients so that I can have a clear understanding of their needs and vision of the project. I am very reliable and I guarantee all my clients are happy with their projects. Thank you for in advance for your time and consideration. I look forward to working with you soon. Thanks, Andrez
    Featured Skill React Native
    Web Development
    Unity
    PHP
    JavaScript
    HTML5
    Android App Development
    Swift
    WordPress
    iOS Development
  • $80 hourly

    • 4.9/5
    • (8 jobs)
    ‪Mike is a full-stack Ruby on Rails developer based in Los Angeles.‬ ‪With 10 years in web development and 6+ years experience in Ruby on Rails, he worked as a lead engineer in several enterprise-level startups for the last a few years. He loves to work with backend and API while he's good in modern JavaScript libraries like React, Angular, and Vue.
    Featured Skill React Native
    Vue.js
    Elixir
    RSpec
    AngularJS
    DevOps
    React
    Ruby on Rails
    Heroku
    Docker
  • $50 hourly

    • 5.0/5
    • (2 jobs)
    I am a well rounded software engineer with a wide range of experience in the corporate technology world. I have worked for a major streaming platform which has allowed me to build my skills as a full stack software engineer. I have also completed my MBA to help bridge the gap between technology and business opportunities. I specialize in anything JavaScript, React, React Native, and Firebase. I manage my own freelancing company providing services for both desktop and mobile applications. I can help businesses of all sizes achieve their goals whether it be taking a product from start to finish, or just fixing bugs and making improvements along the way. Let me help you get up and running in today's digital world! Please reach out to see if I would be a good fit for getting your project to the finish line.
    Featured Skill React Native
    MongoDB
    HTML
    Mobile App Development
    JavaScript
    Node.js
    Firebase
    Web Development
    Redux
    React
    ExpressJS
    SQL
    CSS
    Software Development
  • $120 hourly

    • 5.0/5
    • (43 jobs)
    Full Stack Software Engineer 🧩 who also plays Jazz 🎸 and homesteads. 🌲🏡🌲 • Adept in Typescript, Nodejs, Nextjs, React, HTML, and CSS. • Proficient with Webflow, Shopify, Squarespace, and Wordpress! Self-starter who collaborates well in Agile & process-driven environments while bringing fresh perspectives to the table. Eager to leverage my expertise to tackle complex projects and drive impactful results. ⭐ Ask me about my pricing packages and discounts for a lower rate on longer term work! ⭐
    Featured Skill React Native
    Figma
    MongoDB
    Webflow
    Shopify
    HTML5
    JavaScript
    PostgreSQL
    Tailwind CSS
    Node.js
    Next.js
    React
    TypeScript
  • $40 hourly

    • 4.7/5
    • (23 jobs)
    Hello, and welcome to my freelancing profile! I'm Adrian, a seasoned UI/UX designer and developer with a passion for crafting exceptional digital experiences. With a rich background in working with small and medium-sized organizations, I've successfully served as a trusted partner in designing and developing progressive web and mobile applications. My track record speaks to my commitment to delivering not just solutions, but real value to my clients. I specialize in revamping outdated technologies with the latest frameworks, providing organizations with a competitive edge in today's fast-paced market. My goal is to help businesses dominate their space by ensuring their digital presence is not only up-to-date but also strategically aligned with their goals. If you're seeking a professional who can bring a fresh perspective to your digital projects, enhance user experiences, and empower your organization with cutting-edge technologies, you're in the right place. I understand the importance of making the right hire the first time, and I'm here to bring my expertise to your team. Let's connect and discuss how I can contribute to the success of your projects. Whether you're looking to revamp your current technologies or embark on a new digital journey, I'm ready to help you achieve your goals. Don't hesitate to reach out—I'm excited to be part of your success story! Best regards, Adrian Villalobos Businesswisesolution.com
    Featured Skill React Native
    Wireframing
    UX & UI
    Progressive Web App
    API Integration
    React
    Node.js
    PHP
    CSS
    JavaScript
  • $75 hourly

    • 4.8/5
    • (36 jobs)
    👋 I'm a fullstack developer with over 10+years of experience in building high-quality web applications for clients worldwide. I deliver clean, scalable and maintainable code. Good UX & project management skills. I focus on business needs first. I work with clients of any scale: from startups & small teams to enterprise. ♣︎ I offer: 👉🏼 Web application development 👉🏼 API development / Integrations / Automations 👉🏼 Frontend/backend development 👉🏼 Fullstack development ♣︎ Tech stack: Front: React / Vue / Svelte / Next.js / Nuxt.js / Redux / React Native / React Query / typescript Back: Node.js / Express / Golang CD: Docker / Kubernetes / Helm / Ansible / AWS / GCP Databases: Postgres / Mongo / Cockroach.db / MySQL / Firebase Message brokers: Kafka / NATS / RabbitMQ APIs: gRPC / REST / graphql Patterns: Hexagonal architecture / CQRS / Event sourcing & more Great experience in Automotive | eCommerce | Retail | Fin-tech businesses Keywords: javascript, kubernetes, docusign, no-code tools, integration, REST API, e-commerce, shopify, stripe, serverless, cloud functions, sharetribe, marketplace, hydrogen, strapi, sanity, headless cms, saas Let's get in touch!
    Featured Skill React Native
    Web Application
    Vue.js
    Next.js
    UX & UI
    Node.js
    Firebase
    JavaScript
    API Development
    Golang
    Full-Stack Development
    React
    DevOps
    Front-End Development
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