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Rating is 4.8 out of 5.
4.8/5
based on 255 client reviews
  • $40 hourly
    I am a software engineer specializing in Kotlin/Java and Android. - Clean Architecture, MVVM/MVP/MVC/MVI - Dagger 2, Hilt - REST (JSON, XML, Retrofit/Okhttp) - Social Media integration Facebook, Google - In-app Billing - Google AdMob - SQLite, Room Database - Coroutine/Flow and RxJava2 - Media Player - Git - A lot of others libraries Do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your app.
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    Business with 10-99 Employees
    API Integration
    Payment Functionality
    QR & Barcode Scanner
    Chat & Messaging Software
    WebRTC
    JetPack
    Retrofit
    XMPP
    Kotlin
    Native App Development
    Firebase
    Smack
    Android SDK
    Android
  • $100 hourly
    👋 Hi, I'm Damien, a highly experienced Senior Software Engineer / Team Lead / Solutions Architect with over 20 years s of experience in the world of technology. I have a passion for the design and creation of cutting-edge solutions. I specialize in a vast array of technologies, particularly those related to JavaScript (frontend and backend), Java, Python, PHP, and AWS. I have a passion for continuous learning. I have recently obtained all 12 AWS Certifications as well as the Hashicorp Terraform Associate Certification. 🚀 Expertise Highlights: 🌟 JavaScript Proficiency: I have a deep understanding of JavaScript's ever-evolving landscape, I have mastered my skills in popular frameworks like Angular, React and Node.js. I am passionate about creating quality user experiences and responsive web applications that work both for my customers as well my customers users. 💡 Java Mastery: I have experience in Java which allows me to build robust, scalable, and maintainable server-side applications. I have over 20 years experience in Java, test driven development with Java and I am also well versed in frameworks such as Spring Boot. 🌐 Cloud Expertise: As an AWS enthusiast, I excel in leveraging Amazon Web Services to design and implement scalable and reliable cloud-based solutions. Whether it's setting up infrastructure, optimizing performance, or ensuring security, I've got it covered. I currently hold all 12 AWS certifications as well as the HashiCorp Terraform Associate certification. Having previously worked for AWS, I understand the AWS eco system and I can guarantee successful deployments that will satisfy all pillars of the Well Architected Framework. 🔒 Security First: When it comes to all tasks I perform, Security is job zero. I will never compromise when it comes to security and will always deliver to the highest standards for my customers. 🛠️ Problem Solver: Over the years, I've tackled a myriad of complex challenges, from optimizing code for performance to architecting scalable systems. My problem-solving skills are finely tuned, and I relish in finding elegant solutions. 📦 Full-Stack Capability: I thrive in both frontend and backend development, providing end-to-end solutions that cater to all aspects of a project. 🔧 Tools & Technologies: . JavaScript (Angular, React, Node.js etc.) . Java (junit, Spring, Spring Boot, etc.) . AWS (EC2, S3, Lambda, RDS, EKS, Fargate, Bedrock, AI, etc.) . Databases (MySQL, PostgreSQL, DynamoDB, Oracle, etc) . Frontend Technologies (HTML5, CSS3, SASS/LESS) . RESTful and GraphQL APIs . Version Control (Git) . Containerization (Docker, Kubernetes) 💼 Previous Experience: Throughout my career, I've had the privilege of working with a diverse range of clients and industries, delivering high-quality software solutions that drive business growth and enhance user experiences. 📈 Let's Collaborate: If you're in search of a Senior Software Engineer / Team Lead / Solutions Architect who can bring your vision to life, optimize your codebase, or architect cloud-based solutions on AWS, I'd love to chat. Feel free to reach out, and let's discuss how I can contribute to the success of your project. Together, we can embark on a journey of innovation and excellence! 🚀
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    Terraform
    AWS Development
    Architecture
    Docker
    Kubernetes
    AWS Lambda
    JavaScript
    DevOps
    Angular
    Database
    React
    Amazon Web Services
    Spring Framework
    Java
    Microservice
  • $60 hourly
    AWSS | K8s | Terraform | Golang | Python 🏆 Expert-Vetted DevOps and Cloud engineer, 💯% Job Success Score Over the past decade, Helped 31 companies build and manage cloud operations and engineering using high-edge technologies and production-oriented secure and best practices. Certificates -- AWS Solution Architect Professional -- AWS Solution Architect Associate -- AWS Security Speciality I am a professional & passionate DevOps engineer with vast experience in both systems and automation administration. For the past 9+ years, I have gained immense experience implementing solutions ranging from systems-level optimization to automated end-to-end deployments for major players in the software development industry. DevOps puts businesses on the cutting edge of innovation. My work designing infrastructure for large software development agencies has kept me up to date with the latest industry technologies and standards, and my passion for DevOps has enabled me to provide robust and meaningful implementations for my clients 💡 Why Choose Me? + Cloud Guru :: 9Y AWS , 5Y Azure , 4Y GCP + CI/CD , config management + Service Mesh using Istio , Tracing using Jeager + IaC :Terraform, CloudFormation + Python , Golang and bash shell scripting + Observability : Prometheus, Grafana ,Datadog , SIEM , Wazuh , Thanos
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    Cloud Management
    Security Infrastructure
    CI/CD
    Cloud Architecture
    MongoDB
    Golang
    DevOps
    Kubernetes
    Linux System Administration
    Terraform
    Amazon Web Services
  • $40 hourly
    Want to build the most resilient, fast, documented, and secure systems? To refactor your systems so that they follow today's standards in terms of speed and security? Build Apps that generate revenue because users love them? I have worked mostly with Fintech companies. As such, I give high priority to the security and speed of applications that I build. I have built systems that are used by hundreds and others more than hundreds of thousands of users. I have 6+ years of track record working on projects in varying industries: Fintech, EdTech, Fitness and Wellness, Gaming, and many more. ****************************** REASONS TO WORK TOGETHER *********************************** ✅ Give utmost importance to the respect of deadlines. ✅ Collaborative with excellent communication skills. ✅ Strong Test Driven Development Advocate. ✅ Do not need to be spoon-fed with detailed user stories. From the problem posed, I can easily devise and model multiple solutions from which we can choose. ✅ Eager to learn anything required for the successful completion of the project. I am a fast learner, so this task will be done at a light speed. ✅ Intellectually honest. I will not accept a task I know I am unable to do. **************************** THINGS I CAN HELP YOU WITH ******************************** ✅ Rest APIs ✅ GraphQL APIs ✅ Microservices Architecture Designs ✅ Unit and Integration tests ✅ Desktop applications ✅ Bugs Resolution ✅ System Reviews *************************** SOME TECHNOLOGIES I MASTER ******************************* ✅ Java 8-21 ✅ Spring MVC ✅Ktor ✅ Spring Webflux ✅ Spring Cloud ✅ Spring Security ✅ GraphQL ✅ TeamCity ✅ Docker ✅ AWS ✅ RabbitMQ ✅ Kafka ✅ Jenkins ✅ Maven ✅ Gradle ********************************* CLIENT TESTIMONIALS ************************************ "The freelancer was professional, organised, courteous, very communicative, and was passionate about getting the job done to specification and requirements. If only all freelancers were like this. Florian went above and beyond with his effort to complete the job and I would not hesitate to recommend him to others." "We love to work with Florian. Fantastic work. Fast, knowledgeable, and self-starter. It is a great experience working with him and he was very professional with excellent communication skills and time management skills." ABOUT ME As far as I can remember, I have always wanted to be a programmer. More than a job, it is a passion for me. I am a big Japanese anime fan. Colleagues and friends used to call me Saitama because, like him, I work very hard when I want to master a skill. I will be delighted to work with you. INVITE ME, and together, let's build the greatest software products.
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    Website Maintenance
    Website Audit
    Website Copywriting
    WordPress Website
    Figma
    Webflow
    Website Security
    Website
    WordPress
    Spring Boot
    Web Development
    SQL
    Docker
    Kotlin
    Web Application
  • $30 hourly
    🚀 RESULTS-DRIVEN | 💼 MANAGING DIRECTOR | 🏆 16+ YEARS EXPERIENCE Hello, I am a seasoned software professional and Managing Director with a proven track record of delivering outstanding results. With over 16 years of experience in the IT industry, I bring a wealth of knowledge and expertise to the table. Here's why I could be the perfect fit for your needs: ✔️ You can count on prompt responses to all your messages. ✔️ Expect regular updates without the need for constant reminders. ✔️ I am dedicated to investing the necessary hours to complete tasks promptly. ✔️ Trustworthiness and approachability are my hallmarks. ✔️ I understand the importance of emotional intelligence as well as technical prowess. ✔️ I am well-versed in business acumen and thrive on adding immediate value. My skill set encompasses the following technologies, among others: ✅ Server-side - Java, Spring, Spring Boot, Servelets ✅ Web application development - Angular, React ✅ Databases - MySQL, PostgreSQL, Oracle, MongoDB, Firebase, DynamoDB ✅ ORM - Hibernate ✅ Testing frameworks - JUnit for Java ✅ Build and deploy - Docker, Jenkins ✅ Cloud computing - GCP, AWS(S3, EC2, Lambda) ✅ Search engines - Elasticsearch ✅ Messaging brokers - RabbitMQ, MQTT ✅ Agile Methodology - Scrum and Kanban using project management tools like Jira, Trello, Gitlab, WorkBench, Eclipse, Intellij Idea, Gradle I am passionate about delivering exceptional solutions and believe in driving projects to success. If you have a project in mind, let's connect! I would love to discuss how my expertise can contribute to your goals.
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    JavaFX
    Core Java
    AWS Lambda
    MySQL
    Spring Framework
    Spring Boot
    Hibernate
    Angular
    Spring MVC
    MongoDB
    D3.js
    Google Web Toolkit
    Node.js
    Java
    React
  • $50 hourly
    Hello, I'm Shahzain Ali, a Mobile App Developer with 8 years of experience in Android, iOS, desktop, and VPN apps. I specialize in Kotlin, Swift, Java, and Python. From advanced mobile apps to innovative iOS solutions and robust desktop applications, my work also extends to wearables and IoT. Android: App development with advanced skills in Java, and Kotlin. iOS: iOS app development with advanced skills in Swift, SwiftUI Desktop Applications development, I develop using Tkinter and QT framework, I have awesome experience in Python and C++ with QT. Watch Application: Proficient in crafting apps for wearable devices (wearOS, watchOS, Tizen) VPN Technology Leader: Have an awesome experience in OpenVPN and Wireguard with integration to Android, iOS, and Desktop applications using Python and QT framework. IoT: Developing smart, connected solutions with proficiency in BLE, Arduino, ESP32,nodemcu, and sensors. Technology Toolkit: Development Tools and languages: Swift, Java, Kotlin, SwiftUI, cmake, Xcode, Android studio, QT, Tkinter, Python Database: Realm, Room, Sqlite Serverless architecture: Firebase including storage, Authentication, and Realtime database. Why Work With Me? Proven Success: Over 70 Android and iOS developed for clients globally, including in the USA, Germany, UK, and UAE Skills & Achievements: Comprehensive Authentication & Payment Integrations: Specializing in Firebase, Google, and Facebook authentication, and payment solutions like Stripe and paytabs. Advanced Programming Knowledge: Expert in MVC, MVVM, Google Maps API, geolocation, and biometric authentication. Community Contributor: An active voice in the developer community with a 200K reach on StackOverflow. Here are some awesome reviews of my clients I have developed an Android and iOS applications using Java, Kotlin, Swift.Mobile applications includes complex services of VPN and have Openvpn and Wireguard Protocol. "Perfect developer, adhere to schedule, highly motivated specialist for any complex task, will hire again for sure" I have fixed issue in cmake of an iOS application "Good experience working with Ali. He has a very good attitude and does his best to help"
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    Firewall
    Linux
    Testing
    Qt Framework
    Wear OS
    OpenVPN
    VPN
    Java
    Android App Development
    Kotlin
    Mobile App Development
    iOS
    Python
    Swift
  • $25 hourly
    Hello, My name is Kishan Mehta. I have been working as a professional Mobile App, Unity App, and Shopify Apps developer for 8+ years and am still gaining more experience through more years. 🌟 INTRODUCTION 🌟 ––––––––––––––––––– I am a professional mobile app developer and Game developer having 8+ Years of experience. I have built nice and strong structured applications that use 3rd parry APIs and libraries and standard structure, etc, we are using cutting-edge technologies and the latest versions of the SDK while keeping compatibility with older versions of mobile OS versions. ✅ 8+ years of Exp. - Certified developer ✅ 100% Job satisfaction Or Money back Guarantee. ✅ 100% Project completion ✅ 100% of the clients established a long-term relationship ✅ Eye-Catching Websites and Mobile Apps. ✅ A dedicated full-time freelancer, available up to 40 hours –––––––––––––––––– 🏅 KEY SKILLS 🏅 –––––––––––––––––– I will guide you to find your path throughout the development life cycle. I am fully loaded and skilled with Mobile Apps And Shopify Apps technologies like iOS, Android, Flutter, ReactNative, and Shopify Apps. 📌Shopify App Development: Shopify Liquid Templating Language, Webhooks and Event Handling, Shopify Polaris Design System Framework, Flask 📌Mobile App Development: HTML5, CSS3, sass, Bootstrap, REST API, Android Studio, Xcode (iOS): 📌Cross-Platform Mobile App Development : React Native, Flutter, Kotlin, 📌MOBILE: React Native, Swift, JAVA, Kotlin, Native-Script 📌TRACKING SYSTEM: Trello, Jira, Slack 📌SOURCE CONTROL: GIT ADDITIONAL: Ngnix, apache, pm2, Docker, Jenkins, AWS, DigitalOcean, Google Cloud, FCM, PUSHER Amazon Iot-core, Amazon EC2, Dynamo DB, AWS Elastic Beanstalk, AWS S3, AWS Cognito ➡️ My approach to work is to go beyond the job description and focus on building a long-lasting relationship with all clients. 🎯Top industry experience ▸Mobile App Services ▸On-demand Services ▸Game Development Services ⚡Here is what you can get from me: ▸Custom App Development ▸RESTful API Integration. ▸Dynamic WebSites with a strong Admin Panel To Manage the Mobile Apps and Shopify Apps. ▸Solved Fix bugs in your Existing Apps. ▸Developing in Mobile Applications in Flutter and ReactNative. 🌟Project Management and collaboration: ▸Jira ▸Slack ▸Trello ▸Azure DevOps 🌟Repository Management: ▸Bitbucket ▸GitLab ▸GitHub ▸SVN 🌟Shopify App development ▸Shopify Apps ▸Shopify API 🌟Mobile-App: ▸iOS ▸Android ▸Flutter 🌟Unity development ▸Unity3D Proficiency ▸Game Design ▸User Interface (UI) Design ▸Graphics and Animation 🌟My main technical expertise include the following: ▸Shopify, WordPress, Flutter , ReactNative, API Integration ▸Custom Mobile-App Development, Github Repository ▸Flutter App Development, ReactNative App Development ▸Unity Development, Game Developing. My focus is on delivering high-quality work and It is important for me to build long-term relationships with each client, so I will do my best to make you satisfied.🌍🤝 Thanks & Regards Kishan Mehta
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    Next.js
    BigCommerce
    AWS Lambda
    WordPress Migration
    NodeJS Framework
    Full-Stack Development
    Shopify
    Laravel
    Payment Functionality
    Android
    iOS Development
    API Integration
    In-App Purchases
    Flutter
    Twilio API
  • $20 hourly
    Looking for a skilled and dedicated Mobile App Developer specializing in Flutter with a proven track record of delivering high-quality solutions? Look no further! Here is why: ✅ 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 by Upwork (𝗧𝗼𝗽 𝟯%) ✅ 4+ years of experience in Mobile App Development ✅ 100% Job Success (Client Satisfaction Ratio) ✅ 1300+ hours logged ✅ Budget-friendly ✅ Fluent English & Prompt Communication If you're looking for a dedicated full-time freelancer who consistently delivers quality work with a problem-solving attitude, let's connect! Click on the '𝗜𝗻𝘃𝗶𝘁𝗲 𝘁𝗼 𝗝𝗼𝗯' button to discuss your project in detail and explore how we can bring your vision to life together. I'm excited to learn more about your needs and show you how I can add value. ---------------------------------------------- 𝗪𝗵𝗮𝘁 𝗺𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝗮𝘆? 𝙕𝙚𝙚𝙨𝙝𝙖𝙣 𝙞𝙨 𝙝𝙖𝙧𝙙𝙬𝙤𝙧𝙠𝙞𝙣𝙜 𝙖𝙣𝙙 𝙑𝙖𝙡𝙪𝙚𝙨 𝙘𝙪𝙨𝙩𝙤𝙢𝙚𝙧 𝙝𝙞𝙜𝙝𝙡𝙮. 𝙄 𝙝𝙖𝙫𝙚 𝙛𝙚𝙡𝙩 𝙝𝙚 𝙨𝙩𝙧𝙞𝙫𝙚𝙨 𝙛𝙤𝙧 𝙥𝙚𝙧𝙛𝙚𝙘𝙩𝙞𝙤𝙣 𝙖𝙣𝙙 𝙖𝙗𝙡𝙚 𝙩𝙤 𝙧𝙚𝙬𝙤𝙧𝙠 𝙪𝙣𝙩𝙞𝙡 𝙜𝙤𝙖𝙡𝙨 𝙖𝙧𝙚 𝙢𝙚𝙩 - 𝑨𝒏𝒊𝒔𝒉 𝑵𝑹𝑲 ⭐⭐⭐⭐⭐ 𝘼𝙝𝙢𝙖𝙙’𝙨 𝙖𝙩𝙩𝙚𝙣𝙩𝙞𝙤𝙣 𝙩𝙤 𝙙𝙚𝙩𝙖𝙞𝙡, 𝙘𝙤𝙢𝙢𝙞𝙩𝙢𝙚𝙣𝙩 𝙩𝙤 𝙚𝙭𝙘𝙚𝙡𝙡𝙚𝙣𝙘𝙚, 𝙖𝙣𝙙 𝙥𝙧𝙤𝙗𝙡𝙚𝙢-𝙨𝙤𝙡𝙫𝙞𝙣𝙜 𝙖𝙗𝙞𝙡𝙞𝙩𝙞𝙚𝙨 𝙢𝙖𝙠𝙚 𝙝𝙞𝙢 𝙖𝙣 𝙤𝙪𝙩𝙨𝙩𝙖𝙣𝙙𝙞𝙣𝙜 𝙛𝙧𝙚𝙚𝙡𝙖𝙣𝙘𝙚𝙧. 𝙄 𝙝𝙞𝙜𝙝𝙡𝙮 𝙧𝙚𝙘𝙤𝙢𝙢𝙚𝙣𝙙 𝘼𝙝𝙢𝙖𝙙 𝙩𝙤 𝙖𝙣𝙮𝙤𝙣𝙚 𝙞𝙣 𝙣𝙚𝙚𝙙 𝙤𝙛 𝙖 𝙧𝙚𝙡𝙞𝙖𝙗𝙡𝙚 𝙖𝙣𝙙 𝙩𝙖𝙡𝙚𝙣𝙩𝙚𝙙 𝙖𝙥𝙥 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙚𝙧. 𝙄 𝙡𝙤𝙤𝙠 𝙛𝙤𝙧𝙬𝙖𝙧𝙙 𝙩𝙤 𝙬𝙤𝙧𝙠𝙞𝙣𝙜 𝙬𝙞𝙩𝙝 𝙝𝙞𝙢 𝙤𝙣 𝙛𝙪𝙩𝙪𝙧𝙚 𝙥𝙧𝙤𝙟𝙚𝙘𝙩𝙨. - 𝑻𝒂𝒐𝒖𝒇𝒊𝒄 𝑮𝒂𝒏𝒅𝒊 ⭐⭐⭐⭐⭐ ---------------------------------------------- 𝗪𝗵𝗮𝘁 𝘀𝗲𝘁𝘀 𝗺𝗲 𝗮𝗽𝗽𝗮𝗿𝘁? 💥 𝗣𝗿𝗼𝘃𝗲𝗻 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱: I've delivered 20+ projects with high client satisfaction rates and positive feedback. 💥 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Effective communication is key to success. I'm responsive, attentive, and open to your ideas throughout the project. 💥 𝗣𝗿𝗼𝗯𝗹𝗲𝗺-𝗦𝗼𝗹𝘃𝗶𝗻𝗴: I tackle challenges with a solutions-oriented mindset, finding efficient ways to meet project objectives. ---------------------------------------------- 𝗛𝗲𝗿𝗲'𝘀 𝗺𝘆 𝘀𝘁𝗿𝗲𝗮𝗺𝗹𝗶𝗻𝗲𝗱 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽: ✅ 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀 𝗚𝗮𝘁𝗵𝗲𝗿𝗶𝗻𝗴: I ensure a thorough understanding of your needs. ✅ 𝗨𝗜/𝗨𝗫 𝗗𝗲𝘀𝗶𝗴𝗻: Crafting intuitive designs using Figma or XD for your approval. ✅ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Creating the app, integrating REST APIs, and setting up databases (Firebase, SupaBase, MongoDB etc). ✅ 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 & 𝗙𝗲𝗲𝗱𝗯𝗮𝗰𝗸 𝗟𝗼𝗼𝗽: Delivering a functional version for your review and feedback. ✅ 𝗙𝗶𝗻𝗮𝗹 𝗟𝗼𝗼𝗽: Making necessary adjustments and delivering the polished app for launch. ---------------------------------------------- 𝗪𝗵𝗮𝘁 𝗰𝗮𝗻 𝘆𝗼𝘂 𝗲𝘅𝗽𝗲𝗰𝘁 𝗳𝗿𝗼𝗺 𝗺𝗲? With 4+ years in Mobile app development and a CS background, I've crafted 20+ apps and I can develop the following apps: ✔ Food delivery app ✔ On-demand app ✔ Home services app ✔ Handyman app ✔ Marketplace app ✔ Salon app ✔ Beauty app ✔ Taxi app ✔ Ride app ✔ E-commerce app ✔ Health and fitness app ✔ Travel app ✔ Live Streaming app ✔ Video streaming app ✔ Finance app ✔ Shopping app ✔ Telemedicine app ✔ Real estate app ✔ Social media app ✔ Messaging app ✔ AI Chatbot ✔ AI Wellness app ✔ AI Learning app ---------------------------------------------- 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮'𝐥𝐥 𝐆𝐚𝐢𝐧 𝐟𝐫𝐨𝐦 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐧𝐠 𝐰𝐢𝐭𝐡 𝐌𝐞: ✔ Custom Flutter Mobile App Developer ✔ Flutter Mobile App Developer for IoT Mobile App ✔ Flutter Mobile App Developer for Artificial Intelligence Mobile App ✔ Flutter Mobile App Developer for Security Mobile App ✔ Flutter Mobile App Developer for Digital Agency Mobile App ✔ Flutter Mobile App Developer for Construction Mobile App ✔ Flutter Mobile App Developer for Savings Mobile App ✔ Flutter Mobile App Developer for Payment Transfer Mobile App ✔ Flutter Mobile App Developer for Clothes Shop Mobile App ✔ Flutter Mobile App Developer for School Mobile App ✔ Flutter Android / iOS app ✔ Flutter Bug Fixings ---------------------------------------------- If you're searching for a skilled and dedicated Mobile App Developer specializing in Flutter with a proven track record of delivering high-quality solutions, I'm eager to join your project and contribute to its success. 🚀If you have any queries, message me on my profile for a good conversation or we can hop on a quick call to discuss your project. ❗❗ Check out my portfolio! ❗❗ (The testimonials are from Upwork client feedback, all of them are available below.)
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    CI/CD
    Stripe
    App Development
    FlutterFlow
    Flutter
    Flutter Stack
    RESTful API
    Firebase
    iOS Development
    Android App Development
    Hybrid App Development
    Mobile App Development
  • $40 hourly
    I am an android developer with 5 years of experience. I write native android applications in both java and kotlin. I had experience many different sdks used in android applications, such as firebase, maps, bluetooth, nfc, face detection, in-app purchases, usb devices and many others. I also have good experience with custom and external devices with their own sdks Besides I have a strong background in Finance and Mathemathics I am fluent in 4 languages: English, French, Russian and Ukrainian. Can make a quality translation from/to any of them if needed.
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    Firebase
    Android SDK
    Native App Development
    Kotlin
    Android
    Android App Development
    Core Java
  • $45 hourly
    I have successfully delivered over 20 software products spanning a diverse range of areas, including SaaS solutions, integrations, web applications, mobile applications, blockchain, telegram bots. 9 years in software development: from scratch, road map, delivery, deployment, best practices 2 years as Tech Lead / Architect - managed 6 teams Business processes. Team management. Project management Product and customer-oriented first. Communication channels are open to your questions all the time. Strictly following requirements and deadlines. Tech background: - Core: Java, Spring / Spring Boot - API: REST, GraphQL, SOAP - Security: OAuth 1.0/2.0, JWT - Design: High-loaded architecture, Microservices, Scale, Message Brokers, SOLID, OOP/OOD - Storages: RDBMS - PostgreSQL, MySQL, Oracle. NoSQL - DynamoDB, Elasticsearch, MongoDB, Redis. MB - Kafka, ActiveMQ, RabbitMQ - Migrations: Flyway, Liquibase, Mongock - Deployment: AWS, Docker, K8S, Zookeeper, Terraform - CI/CD: Gitlab ci/cd, Jenkins, TeamCity - Front-end: ReactJS, AngularJS, ES6 - Other: S3, SNS, SQS, Apache Camel, Blockchain, Solidity, Lombok
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    API Integration
    Microservice
    Blockchain
    Spring Boot
    Spring Framework
    Database
    Software Architecture & Design
    Apache Camel
    SaaS
    Web Service
    RESTful API
    API Development
    Java
    JavaScript
    MySQL
  • $30 hourly
    Over the last 10+ years, I have developed a wide range of Enterprise Web Applications using Java. My Skills include : ✅ Java, JavaEE, EJB, JSP, Servlet, Hibernate, JPA, Android ✅ Frameworks: Grails with Groovy, Spring MVC, JSF, Struts, GAE, ZK, Android SDK ✅ Cloud services : AWS (EC2, RDS, Elastic Beanstalk, S3), Google Services ✅ Databases: MySql, MSSQL, Oracle ✅ Reporting Tools: iText, Apache POI, JasperReport, Aspose, Highcharts ✅ JAX-RS, REST API, Web Service, XML, JSON, Amazon S3/EC2 Services ✅ Web Security (XSS Attack, SQL Injection, XSRF Attack, Server Security) ✅ Social Integration : Facebook, Twitter, YouTube, Google+ Integration ✅ Payment Gateway : Payeezy(FirstData), Stripe, Twillo ✅ Frontend Tools: HTML, JavaScirpt, jQuery, Ajax, CSS, Bootstrap ✅ VCS: GIT, SVN ✅ Build Tools: Maven, Ant, Gradle ✅ Server: Tomcat, NGINX, JBoss (WildFly) ✅ IDE: Eclipse, Intellij, NetBeans, Android Studio ✅ Unit Test: JUnit, Mockito ✅ Automation: Selenium web driver I believe in quality along with deadline of the project.
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    Grails
    MySQL
    Apache Tomcat
    Jakarta Server Faces
    jQuery
    Hibernate
    HTML
    Java
    JavaScript
    CSS
    Spring Framework
    Web Development
  • $30 hourly
    10+ Years of Experience | 100+ Projects | 12,000+ Hours | 99% Rating 🌍I help tech-driven businesses and startups bring their ideas to life—offering seamless, end-to-end solutions that cover everything from ideation and development to launch and scaling. With a strong background in MERN/MEAN/LAMP stacks, cloud infrastructures like AWS, and a proven track record in UI/UX design, I focus on both the technical details and delivering tangible business value. I have collaborated with diverse clients across a range of industries, including E-commerce and marketplaces, Fintech, Healthcare, Media and Entertainment, Automotive, Education and Learning Management Systems, as well as Travel and Hospitality. 🚀 My Services: Web Development 📌 Full-Stack Expertise: Skilled in PHP (Laravel, Symfony, Yii), Node.js, and Python backends, with front-end frameworks including Vue, Angular, React. 📌 Scalable Architectures: Proficient in AWS EC2, RDS, Google Cloud, and Digital Ocean, leveraging CronJobs and Cloudflare for performance and security. 📌 Database Management: Expertise in MySQL, MongoDB, and SQL Server. Mobile App Development 📌 Hybrid Apps (Flutter/React Native): 6+ years of experience building feature-rich, high-performance apps for both iOS and Android. 📌 Integration & Performance: Proficient in Google Maps, Analytics, Street View, YouTube API, embedded sensors (Camera/GPS), and social platform logins. 📌 Secure Authentication: Implementing Firebase Authentication, social login (Facebook/Google/Apple), and custom authentication flows. API Integration 📌 Third-Party APIs: Deep experience with ShipEngine, Salesforce, HubSpot, BullHorn, Xero, and other RESTful APIs. 📌 Custom API Development: Designing secure, scalable APIs tailored to unique business requirements. 📌 Complex Use Cases: End-to-end integrations for ATS, CRM, taxation tools, and custom data pipelines. UI/UX Design 📌 Modern & Responsive: Proficient with Figma and Adobe XD to craft intuitive, user-centric interfaces. 📌 Front-End Tools: Expertise in HTML, CSS, Bootstrap, jQuery, and JavaScript frameworks to deliver engaging, dynamic experiences. 📌 User-Centric Approach: Focused on clear navigation, consistent branding, and exceptional usability. Payment Integrations 📌 Stripe & Stripe Connect 📌 Onboarding (Standard, Express, Custom) for vendors/merchants/sellers 📌 Payment Methods (Credit Card, Alipay, Apple Pay, Google Pay, WeChat Pay, ACH Debit, etc.) 📌 Charges & Transfers (Direct, Destination, Separate Charges & Transfers) 📌 Subscription Management (Recurring billing, Customer Portal, refunds/chargebacks) 📌 Other Payment Gateways: PayPal, crypto payments, and more—handling complex scenarios like cancellations and partial refunds. 🚀 Why Choose Me ⭐ End-to-end solutions from concept to development, testing, and support. ⭐ Tailored solutions that reflect your unique vision and brand. ⭐ Expertise in building scalable websites and mobile apps that grow with your business. ⭐ Regular updates, clear timelines, proactive solutions. ⭐ Worldwide availability across all time zones. Ready to transform your idea into a powerful digital solution? Let’s connect and explore how we can bring your vision to life with cutting-edge technology and a business-focused approach. Feel free to reach out—I’m here to help you succeed.
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    Web Development
    Next.js
    Ruby on Rails
    CodeIgniter
    UI/UX Prototyping
    Web Design
    Vue.js
    Stripe
    Laravel
    Payment Gateway Integration
    API Integration
    Flutter
    Amazon DynamoDB
    PHP
    Angular
    Node.js
    Mobile App Development
  • $45 hourly
    📉 𝐑𝐞𝐝𝐮𝐜𝐞 𝐂𝐨𝐬𝐭𝐬 𝐛𝐲 𝟐𝟎% 𝐨𝐧 𝐑𝐞𝐩𝐞𝐭𝐢𝐭𝐢𝐯𝐞 𝐓𝐚𝐬𝐤𝐬 𝐰𝐢𝐭𝐡 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 🏆 𝐓𝐨𝐩 𝟑% 𝐨𝐟 𝐅𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 ✅ 𝟔𝟎 𝐒𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥𝐥𝐲 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 🌟 𝟏𝟑+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐀𝐈, 𝐖𝐞𝐛, 𝐚𝐧𝐝 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 As the Founder and tech Consultant at 𝐏𝐞𝐫𝐟𝐬𝐨𝐥, I bring a decade of profound knowledge and hands-on experience in UI/UX and Mobile development. My expertise extends to Android, iOS, TV app development, Android TV, Amazon Fire TV, tvOS, OTT apps, and React Native. 𝐂𝐨𝐫𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬: 🔸 Custom AI agents 🔸 iOS & Android native apps and cross-platform React Native 🔸 Custom Web Solutions 𝐖𝐡𝐞𝐧 𝐝𝐨 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐧𝐞𝐞𝐝 𝐮𝐬? 🔸 Building MVP from scratch 🔸 Product launches 🔸 Extending in-house teams 🔸 Enhancing the design of existing apps Perfsol proudly holds the title of a 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 company on Upwork. Our satisfied clients consistently recommend us, underscoring the reliability of our work. Since 2012, I have had a solid track record as an Android developer. I have a StackOverflow score of 6K and predominantly answer Android-related queries. 𝐃𝐨 𝐲𝐨𝐮 𝐰𝐚𝐧𝐭 𝐲𝐨𝐮𝐫 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐭𝐨 𝐠𝐫𝐨𝐰? Keywords: Java, Kotlin, Swift, React Native, AndroidX/JetPack, Leanback, MVVM/MVP patterns, Integrating REST/GraphQL APIs, SQLite, Realm databases, Room, ExoPlayer customization and performance tuning, offline playback, caching, using Google IMA SDK for multimedia ads, MediaCodec/MediaMuxer/MediaExtractor/FFmpeg for video processing, Security/Encryption, Biometric, Firebase Auth/Cloud functions/Database/Storage, Troubleshooting performance problems, AI, ChatGPT, AI agent. Updated: 18th of January 2025
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    Android App
    React Native
    iOS SDK
    SaaS Development
    Android SDK
    Android App Development
    Apple TV Application
    Mobile App
    iOS
    Android
    Swift
    Java
    Kotlin
  • $25 hourly
    ✅ 2500+ hours and still counting ✅ 70+ jobs completed successfully ✅ 100% Job Success (Client Satisfaction Ratio) ✅ High-Quality Work ✅ Budget-friendly ✅ Fluent English Hello! I'm Ahmad Naeem Zaidi, a seasoned mobile developer with over 8 years of hands-on experience in creating robust, user-centric mobile applications. I specialize in Android, iOS, Flutter, React Native, and other cross-platform frameworks, delivering top-tier solutions tailored to meet client goals and user expectations. During the last 8+ years, I have developed many different types of iOS and Android mobile apps. 𝗧𝗮𝘀𝗸 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗔𝗽𝗽 (𝗹𝗶𝗸𝗲 𝗧𝗼-𝗗𝗼), 𝗙𝗼𝗼𝗱 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝗔𝗽𝗽, 𝗥𝗲𝗮𝗹 𝗘𝘀𝘁𝗮𝘁𝗲 𝗟𝗶𝘀𝘁𝗶𝗻𝗴 𝗔𝗽𝗽, 𝗜𝗻𝘃𝗲𝗻𝘁𝗼𝗿𝘀 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗔𝗽𝗽, 𝗥𝗶𝗱𝗲 𝗜𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗼𝗿 𝗕𝗼𝗼𝗸𝗶𝗻𝗴 𝗔𝗽𝗽, 𝗢𝗻-𝗱𝗲𝗺𝗮𝗻𝗱 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗦𝗽𝗼𝗿𝘁𝘀 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗘𝘃𝗲𝗻𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗚𝗿𝗼𝗰𝗲𝗿𝘆 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗜𝗻𝘃𝗲𝗻𝘁𝗼𝗿𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗔𝗽𝗽, 𝗦𝗼𝗰𝗶𝗮𝗹 𝗠𝗲𝗱𝗶𝗮 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗘-𝗖𝗼𝗺𝗺𝗲𝗿𝗰𝗲 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗙𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗲 𝗠𝗮𝗿𝗸𝗲𝘁𝗽𝗹𝗮𝗰𝗲 𝗔𝗽𝗽, 𝗔𝗽𝗽𝗼𝗶𝗻𝘁𝗺𝗲𝗻𝘁 𝗕𝗼𝗼𝗸𝗶𝗻𝗴 𝗔𝗽𝗽, 𝗛𝗼𝗺𝗲 𝗦𝗲𝗿𝘃𝗶𝗰𝗲 𝗕𝗼𝗼𝗸𝗶𝗻𝗴 𝗔𝗽𝗽, 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, 𝗩𝗲𝗻𝘂𝗲 𝗕𝗼𝗼𝗸𝗶𝗻𝗴 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽, and many more. ---------------------------------------------- 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐞𝐬 ✔ Android App Development ✔ iOS App Development ✔ Flutter App Development ✔ React Native App Development ✔ Ionic & AngularJS ✔ Cordova & Cross-Platform Development ✔ UI/UX Design & Integration ✔ API Integration ✔ Mobile App Testing & Debugging ✔ Performance Optimization ✔ App Maintenance & Updates 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? Proven Track Record: With 8 years of experience, I’ve successfully delivered a wide range of mobile applications across various industries. My work is characterized by high-quality code, efficient architecture, and a user-focused approach. **Cross-Platform Mastery:** My expertise in Flutter and React Native enables me to develop apps that function seamlessly on both Android and iOS, ensuring a consistent user experience across platforms. **Design-Centric Approach:** I have a keen eye for UI/UX design, ensuring that the apps I develop are not only functional but also aesthetically pleasing and intuitive to use. **Effective Communication:** I prioritize clear, consistent communication, keeping you informed at every stage of the project. Your feedback is integral to the development process. **Commitment to Excellence:** I’m dedicated to delivering high-quality work on time and within budget. Your project’s success is my top priority. ----------------------------- 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: **Full-Cycle Development:** From initial concept to deployment, I manage every aspect of the development process, ensuring a seamless experience and a product that meets your needs. **Performance Optimization:** I focus on optimizing app performance, ensuring fast load times, smooth navigation, and a top-notch user experience. **Problem Solving:** I excel at troubleshooting and problem-solving, ensuring your app runs smoothly across different devices and platforms. **Continuous Support:** I offer ongoing maintenance and updates to keep your app relevant and performing optimally as technology evolves. 𝐋𝐞𝐭’𝐬 𝐁𝐫𝐢𝐧𝐠 𝐘𝐨𝐮𝐫 𝐕𝐢𝐬𝐢𝐨𝐧 𝐭𝐨 𝐋𝐢𝐟𝐞: Whether you're looking to build a new mobile app, enhance an existing one, or resolve technical challenges, I have the skills and experience to make it happen. Let’s discuss your project and how I can help you achieve your goals. 𝐆𝐞𝐭 𝐢𝐧 𝐓𝐨𝐮𝐜𝐡: I’m passionate about leveraging cutting-edge technologies to create innovative mobile solutions. If you’re looking for a dedicated mobile developer who can turn your vision into reality, let's connect and explore how I can contribute to your project's success.
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    Android SDK
    Laravel
    Mobile App Development
    Android Studio
    Dart
    API Integration
    QR & Barcode Scanner
    Flutter
    Swift
    React Native
    Java
    Kotlin
    Android
    iOS
  • $50 hourly
    I am a passionate full-stack Java/Java EE Developer with 15+ years of professional experience. My areas of expertise include developing and deploying Java applications. I have worked with most Java technologies and versions. Starting from JAVA 1.2 to Java 21. From J2EE to JAVA EE 5,6 and 7. I have deployed applications successfully in AWS using Docker and Kubernetes. I am equally passionate about DevOps. I have maintained build and deployment scripts for most of my projects. ✅Java ✅Springboot ✅Spring Framework ✅Java EE ✅J2EE ✅Docker ✅Kubernetes ✅REST ✅SOAP ✅Webservices ✅JPA ✅EJB ✅Jenkins ✅Circle CI ✅Linux ✅Groovy
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    J2EE
    API
    Continuous Integration
    React Native
    React
    Jenkins
    API Development
    RESTful API
    JavaScript
    Spring Boot
    Java
    Spring Framework
    Kubernetes
    Amazon Web Services
    Docker
  • $50 hourly
    As a seasoned Mobile & Frontend app developer with over 10 years of experience, I specialize in creating innovative, scalable mobile solutions that drive real business value. My expertise covers the entire mobile development lifecycle, from initial concept to deployment and optimization, with a focus on React Native and cross-platform technologies. I’m passionate about helping businesses leverage the latest mobile technologies to deliver exceptional user experiences while achieving measurable results aligned with core business goals. Key Achievements: * Architected top-performing consumer apps that achieved industry-leading downloads and user satisfaction * Engineered a business-critical mobile solution, enhancing operational efficiency and increasing revenue for a major client * Successfully delivered high-quality projects on time and within budget, consistently maintaining strong client satisfaction Technical Expertise: * Mobile Development: React Native, Ionic Framework * Frontend: React, Angular, HTML5, CSS3, Sass, JavaScript, TypeScript * Database Integration: RESTful APIs, SQLite, Firebase * State Management: Redux, Zustand, RxJS * DevOps: CI/CD pipelines for Android and iOS, ensuring smooth build, test, and deployment processes * Version Control: Git, GitHub, GitLab, Bitbucket * Project Tools: Jira, Slack, Microsoft Teams, Zoom What I Offer: * End-to-end mobile app development—from concept to launch—focused on scalable and maintainable architectures * Strategic consulting to help you select and implement the right mobile technologies for your needs * Optimization of legacy apps for better performance and user engagement * Agile team leadership and mentoring to ensure development best practices * Seamless alignment of technical solutions with your business goals Ready to transform your concept into a market-ready mobile application? Let's connect and discuss how my decade of expertise can drive your project to success across Android and iOS platforms.
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    Front-End Development
    Mobile App Bug Fix
    Mobile App Development Consultation
    Mobile App Development
    Social Media Account Integration
    Firebase
    HTML5
    Chat & Messaging Software
    TypeScript
    JavaScript
    React
    Angular
    Ionic Framework
    React Native
    Hybrid App Development
  • $40 hourly
    With over 8 years of experience as an Oracle certified developer, I specialize in JavaFX desktop application development, boasting expert knowledge of the JavaFX framework. My forte lies in applying architectural patterns and adhering to best practices, resulting in the creation of clean, expandable code for your projects. I am passionate about delivering robust and user-friendly applications, always striving to guarantee client satisfaction. My dedication extends beyond technical expertise; I am also a proficient communicator and an effective team player, ensuring seamless collaboration on every project. In addition to my core skills, I am well-versed in essential development tools like Git, Maven, Gradle, Eclipse, IntelliJ IDEA, and JProfiler. This comprehensive skill set enables me to navigate your projects with precision and efficiency. Let's work together to transform your Java development goals into reality.
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    JetBrains IntelliJ IDEA
    Desktop Application
    JavaFX
    OpenGL
    MQTT
    User Interface Design
    Game Development
    SQL
    Git
    Java
  • $40 hourly
    Do you want to turn your idea into an IT project? 𝐋𝐞𝐭'𝐬 𝐠𝐞𝐭 𝐚𝐜𝐪𝐮𝐚𝐢𝐧𝐭𝐞𝐝.🤝 Hello, my name is Dmitriy Forys, I am Co-Founder at 𝐃𝐚𝐭𝐚𝐎𝐱, a leading company in the Comprehensive Software Development sector. I am thrilled you're considering us for your project, and I'm confident our team have the skills, expertise, and experience to deliver outstanding results. 📌 Our Offerings • End-to-end custom software development ➖ You've got ideas, we've got solutions. • Automation ➖ Automated solution from existing business process. • Data services: scraping, extraction, processing ➖ Any data. Any size. Anywhere. • SaaS and Web Development ➖ From the idea to the first subscriptions. • Dedicated Crew ➖ An extension of your in-house team. • Guarantees ➖ Dependable solutions, timely delivery, and steadfast support. 📌 Why Choose 𝐃𝐚𝐭𝐚𝐎𝐱 • Absolute dedication - the ultimate goal is the client's satisfaction. • Stress-free same-day communication with the top experts in the industry. • Relationship-centric approach - approximately 80% of our clients are returning customers. • In-depth engagement - increased involvement leads to superior outcomes. • Complete transparency - no unexpected surprises, remain informed throughout the process. • Going the extra mile - providing added advantages to exceed your expectations. • Proficient in English - eliminating language barriers for clear communication and timely execution. If these resonate with you, our team is poised to meet your needs! Feel free to schedule 𝙁𝙍𝙀𝙀 consultation with 𝗧𝗢𝗣 𝗘𝗫𝗣𝗘𝗥𝗧𝗦. Just contact us.
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    Chatbot Development
    Data Mining
    Bot Development
    Automation
    Web Scraping
    Data Extraction
    Data Scraping
    API Development
    Artificial Intelligence
    Machine Learning
    JavaScript
    Python
    API Integration
    API
    Web Development
  • $25 hourly
    I am a full stack developer with 7+ years experience Microservices, good command over Java, J2EE, Spring Framework, Hibernate/JPA, Angular, MongoDb and MySql, Tomcat Apache, Spring Cloud, AWS. I have worked on real-time projects in a diverse business domain. I have good knowledge of Software Development Life Cycle(SDLC) and Agile Methodology which helps in building "High-Tech" solutions for end users and results in low maintenance costs. I am flexible to project demands and shifting of priorities. I am open and willing to learn whatever is necessary to accomplish my clients' goals. Thank you, I look forward to working with you. Having around 6+ years of IT experience in the areas of Analysis, Design and Development. Technical Skills: • Primary Language(s): Java, J2EE • Framework(s): SpringBoot, Spring Framework, Spring MVC, Spring Security, JPA/Hibernate, Kafka • Architectures: Monolithic, Microservices • Web Technologies: HTML, CSS, Angular 6 • Database: MySql, NoSql - MongoDB • Web Server(s): Apache Tomcat, Apache Load Balancer • Web-Services and Tool: RestFul, Postman, Graphql • Software Development Methodology : Agile:-Scrum, Sprint • IDE/Gui Tool(s): IntelliJ, Eclipse, Jira, BitBucket, Gradle, Maven, Microsoft Sql Server Management Studio, Postman, Putty, SSH Secure Shell, Robo 3T
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    Web Scraping
    Automated Testing
    Spring Cloud
    Core Java
    J2EE
    Spring Security
    Python
    Microservice
    Java
    Amazon Web Services
    RESTful API
    MongoDB
    SQL
    Spring Framework
    Spring Boot
  • $25 hourly
    𝗧𝗢𝗣 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 As a dedicated software engineer with over 𝗘𝗶𝗴𝗵𝘁 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲, I specialize in cutting-edge web development technologies, focusing on the JavaScript Ecosystem and related technologies. My expertise and passion for creating efficient, user-friendly web applications allow me to deliver high-quality solutions that consistently exceed client expectations. Hiring me, you will get the following: ✅ Expertise in Modern Web Development: Extensive experience in JavaScript and related technologies. Expert Knowledge in state-of-the-art frameworks, including but not limited to 𝗥𝗲𝗮𝗰𝘁, 𝗔𝗻𝗴𝘂𝗹𝗮𝗿, 𝗡𝗲𝘅𝘁, 𝗩𝘂𝗲, 𝗮𝗻𝗱 𝗔𝘀𝘁𝗿𝗼. Skilled in PHP frameworks like Laravel and CMS as WordPress. ✅ Versatile Development Skills: Creating and executing web and mobile applications from the ground up. Enhancement and maintenance of existing systems for optimal performance. Resolution of software issues to ensure system stability. Translation of Figma designs into functional, mobile-responsive web interfaces. ✅ Project Capacities: Reliable communication Code assessments and project evaluations. Project status and report regularly to ensure client satisfaction. Competitive and affordable prices. Services I offer: Web development using React, Next, Angular, and Astro: Mastery in building responsive, high-performance web applications. Mobile App with React Native and Ionic: Development of cross-platform mobile apps with a single codebase. API Integrations: I am an expert in integrating services like Stripe, PayPal, Twilio, email services, marketing tools, and Google Maps. Data management: Real-time database management and cloud services. UI/UX Design: Crafting intuitive user interfaces with tools like Tailwind CSS and NativeWind. In my professional journey, I have partnered with clients from diverse sectors, including startups and established enterprises, to transform their app concepts into reality. My dedication lies in grasping my clients' vision, converting it into a practical application, and offering continuous support to guarantee its success in the market. Feel free to reach out with any questions or queries. I look forward to engaging opportunities!
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    AWS Development
    Laravel
    Angular
    Flutter
    Vue.js
    Node.js
    React
    WordPress Development
    HTML5
    CSS 3
    Git
    SQL
    JavaScript
    Bootstrap
    PHP
  • $25 hourly
    Languages: Java/Kotlin OOD: SOLID/DRY/KISS principles, GoF patterns, MVC/MVP/MVVM/MVI architecture Jetpack: ViewModel, LiveData, LifeCycle, Room, Paging, Navigation, WorkManager, Compose Libraries: RxJava/RxAndroid, Dagger/Hilt, Retrofit/OkHttp, Gson/Moshi, Glide/Picasso/UIL/Coil, ButterKnife, Realm, Parceler, EventBus, GPUImage, Timber, JodaTime/ThreeTen, Dexter, GoogleMaps/OSM/YandexMapKit, Zxing, MPAndroidChart SDK: Firebase, Facebook/Twitter/OK/VK/LinkedIn, Google Play Services (auth, analytics, cloud messaging, drive, ads, location, activity, in-ap billing)
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    RESTful API
    Android SDK
    Android App Development
    Kotlin
    Java
    Android Studio
    Firebase
    Android
  • $100 hourly
    I'm excited and looking forward to bringing my 20 years of professional experience to your project! I specialize in DevOps practices across IT disciplines from networking and security to automation and CI-CD to software development.
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    Automation
    DevOps
    Security Analysis
    Cloud Computing
    Docker
    Linux
    Containerization
    Kubernetes
  • $95 hourly
    I'm a technology consultant and software developer able to to piece together software using any platform or architecture in order to provide you with a leading edge solution. My expertise is in Cloud Architecture, DevOps and Data ETL. Recently I've honed my skills further into Business Intelligence, specifically in the use of Microsoft Power BI and similar tools to determine new ways the businesses can improve productivity or increase revenue. I am avidly involved in IoT projects especially using LoRaWAN as a communication mechanism. I have 10+ years of working with data in the building automation industry (BACnet, Modbus, Tridium Niagara etc.) I am an experienced Product Manager and can take your product from Ideation to Commercial Reality.
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    Startup Consulting
    Business Development
    Amazon Web Services
    Business Analysis
    Internet of Things
    Microsoft Power BI
    Azure IoT HuB
    Data Modeling
    Data Analysis
    Product Management
    Product Development
  • $35 hourly
    🚀 10+ Years of Mobile App Development Excellence 🌟 | Proven Skills & Expertise in Android & iOS | Over 35 Client-Loved Projects 🌟 🌟 🌟 Are you seeking an app developer who not only understands your app needs but is passionate about creating a digital experience that resonates with your audience? 🚀 Absolutely! I specialize in developing Android and iOS apps using Kotlin or Swift that go beyond functionality, ensuring a user-friendly interface, robust features, and a design that captivates your target users. Fed up with sluggish performance, buggy interfaces, and missed deadlines? 🚀 Your solution is here. I am committed to delivering reliable, efficient, and high-performance apps, meeting deadlines without compromising app quality. Say goodbye to mobile app development issues and bugs; let's build something exceptional together. 💪 My Strengths: ✅ Figma, Adobe XD & Sketch UI/UX Implementation ✅ Mobile App Development ✅ Native App Development ✅ Android App Development ✅ iOS Development ✅ Unit Testing & Code Review ✅ Firebase ✅ CI/CD ✅ SQLite ✅ REST APIs and JSON Languages: ✅ Kotlin ✅ Swift ✅ Java
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    JSON
    Unit Testing
    CI/CD
    Swift
    iOS Development
    iOS
    Mobile App Development
    Native App Development
    Smartphone
    SQLite
    Java
    Android App Development
    Android
    Firebase
    Kotlin
  • $30 hourly
    𝗠𝘆 𝗦𝘁𝗮𝗰𝗸 𝗶𝗻𝗰𝗹𝘂𝗱𝗲𝘀: 𝙇𝙖𝙣𝙜𝙪𝙖𝙜𝙚𝙨 𝙖𝙣𝙙 𝙛𝙧𝙖𝙢𝙚𝙬𝙤𝙧𝙠𝙨 Java JavaFX REST API SOAP SQL HTML + CSS Javascript React Figma UI/UX Git and GitHub Obfuscation - ProGuard Code hardening/Code signing UML. MacOS Installer Windows Installers. WIX Toolset MacOS Software Notarization. MacOS EV Signature Mac OS App development Desktop Application Web Application Spring Boot Spring Security Nginx Web server Docker REDIS caching Back-end Development ChatGPT Code Security 𝑫𝒂𝒕𝒂𝒃𝒂𝒔𝒆𝒔 MySQL SQLite Oracle PostreSql 𝐓𝐨𝐨𝐥𝐬 𝐈 𝐮𝐬𝐞: Advanced Installer Launch4j Install4j Maven - dependency management Scene Builder - GUI Builder GitHub Application testing 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗻𝗴 𝘀𝘆𝘀𝘁𝗲𝗺𝘀: macOS Linux - Ubuntu Windows Time Management and time consciousness. 𝑰 𝒗𝒂𝒍𝒖𝒆 𝒕𝒊𝒎𝒆 𝒂𝒏𝒅 𝒒𝒖𝒂𝒍𝒊𝒕𝒚 𝒔𝒆𝒓𝒗𝒊𝒄𝒆𝒔 𝒔𝒐 𝒎𝒖𝒄𝒉 𝒂𝒏𝒅 𝑰 𝒕𝒉𝒊𝒏𝒌 𝒚𝒐𝒖 𝒅𝒐 𝒕𝒐𝒐.
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    Inno Setup
    Desktop Application
    Mac OS App Development
    Spring Framework
    Ubuntu
    Figma
    Software Debugging
    Java GUI
    SQL
    JavaFX
    SQLite
    macOS
    Git
    Application Installer
    Java
  • $75 hourly
    Cloud Infrastructure Architect | DevOps, MLOps, and Blockchain Expert. With over 12 years of experience in Cloud Engineering, I bring senior-level expertise in DevOps, DevSecOps, MLOps, and blockchain integration, ensuring the secure and efficient deployment of cutting-edge applications. As the CTO and Co-Founder at Dysnix, I lead a company specializing in Kubernetes-based projects for cloud computing, infrastructure optimization and scaling, Web3, raw blockchain data solutions, and ML/AI. Since 2018, we've developed fail-proof and secure blockchain infrastructure solutions, trusted by leading industry names such as ZKSync, Polygon, Nansen, and PancakeSwap. My Mission I focus on delivering optimal and cost-efficient solutions for high-load projects, balancing complex technical requirements with business objectives. Security/Compliance I design and implement infrastructure solutions compliant with standards like PCI, HIPAA, GDPR, ISO27001/17, and SOC2 by: - Implementing RBAC and network policies - Integrating Vault for secure data management - Encrypting volumes and data channels Core Responsibilities In most projects, I handle end-to-end solutions, including: - Designing, deploying, and maintaining Kubernetes-based secure environments - Implementing Infrastructure-as-Code practices - Application architecture and design - Setting up CI/CD pipelines - Deploying monitoring and alerting systems - Aggregating logs and events - Enabling multi-layer DDoS protection - Mentoring in-house teams - Providing cloud consulting and migration services Certifications - Certified Kubernetes Administrator (CKA) - AWS Certified Solutions Architect – Professional - Terraform Certified Technical Stack Cloud Providers: AWS, GCP, Azure, DigitalOcean, Alibaba Cloud, Hetzner Programming: Python, Node.js, Solidity, Golang IaC Tools: Terraform, Helm, Ansible Serverless: Kubeless, KNative, AWS Lambda, Google Functions Containers/Orchestration: Docker, Kubernetes, Swarm, Rancher CI/CD: GitLab CI, Jenkins, CircleCI, Blue-Green Deployment, Canary Deployment Service Mesh: Istio ML/NLP: Scikit-learn, spaCy, TensorFlow, PyTorch, GPT/GPT-2, OpenCV, Parl.ai, Vertex by GCP Big Data: Apache Spark, Cassandra, Hadoop, Kafka, Neo4j, NiFi Compliance: PCI, HIPAA, GDPR, ISO27001/17, SOC2 MLOps, AIOps, ChatOps, GitOps My primary objective is to seamlessly transition models from concept to production, accelerate time-to-market, and ensure ongoing business value. By leveraging Vertex AI on GCP, I streamline ML deployment and automation, significantly reducing development timelines while ensuring the setup’s flexibility and scalability. I prioritize data quality and build systems for automated testing of ML artifacts and anomalies detection. This helps to solve the problems of model decay and locality. To unify the release cycles of models and software applications, I offer the following services: - Model Monitoring - Model Re-Assessment and Drift Detection - Data Versioning and Management - Automated Training Pipelines - CI/CD for ML - Feature Stores - Experimentation and Hyperparameter Tuning - Scheduling and Orchestration - Model Validation and Deployment - Integration with Vertex AI Workbench About Dysnix At Dysnix, we have battle-tested solutions to optimize resources and streamline business processes. Our team is ready to help solve your most challenging technical problems. Let’s connect if you’re looking to leverage pioneering DevOps and MLOps technologies to solve your business challenges effectively. Our Clients zkSync PancakeSwap Polygon Nansen GCP x Blockchain-ETL MatterLabs NFTrends
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    Web3
    Docker
    Blockchain
    Artificial Intelligence
    Machine Learning
    Solution Architecture
    Deployment Automation
    GitLab
    Kubernetes
    DevOps
    CI/CD
    Python
    Google Cloud Platform
    Amazon Web Services
  • $20 hourly
    Flutter | Android | iOS | React Native | Kotlin MultiPlatform | Flutter UI | Flutter Development | Flutter BLoC | Flutter Provider | Flutter Hooks | Flutter Firebase Integration | Flutter Animations I am an enthusiastic developer with a strong programming background and possess excellent app development skills. I have developed a wide range of native and hybrid applications, satisfying all of my clients. With 10+ years of experience in mobile application development across various domains such as Fitness, Sports, Education, and Social, I specialize in delivering high-quality solutions. I hold a BS in Software Engineering from a reputable university and have participated in various competitions like Google Code Jam, HackerRank, and CodeFest to hone my skills. Apart from programming apps from scratch, I also provide maintenance services for your ongoing projects. SDK Integration Expertise: Amazon Web Services (AWS) Firebase Database and Analytics Stripe Gateway Braintree Twilio OpenTok MessageKit PubNub Sinch Facebook Twitter Google I believe in providing satisfactory and quality work to my clients to establish long-term relationships. Looking forward to working with you. Thanks for your time! Flutter Libraries & Tools that I used for writing flutter applications. - BLoC / Cubit - Provider - Riverpod - Flutter Hooks - Freezed - RxDart - GetX - Dio - Floor - Hive - Isar - Auto Route - get_it - Equatable - flutter_secure_storage - Shared Preferences - flutter_local_notifications - intl - Lottie - Firebase Messaging - json_serializable - flutter_native_splash - flutter_localization - path_provider - google_maps_flutter - flutter_svg - flutter_modular Note: Most of the in-progress jobs on my Upwork account are already completed and are awaiting client closure.
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    Android App
    Swift
    Kotlin
    Dart
    Hybrid App Development
    Flutter Stack
    FlutterFlow
    React Native
    Firebase
    Android App Development
    Flutter
    iOS Development
    Mobile App Development
    Java
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