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Rating is 4.9 out of 5.
4.9/5
based on 288 client reviews
  • $56 hourly
    • 5.0/5
    • (6 jobs)
    Hello World! My name is Yan and I am React.js/Node.js developer. I consider my self rather experienced both with front-end and back-end. I really like to know how and why everything works (or not..). The list of skills may look like: HTML, CSS, JAVASCRIPT, C#, XML, XSL, REACT.JS, NODE.JS, FLUTTER, ADOBE PHOTOSHOP, BLENDER, GIMP, INKSCAPE, UNITY3D. Opened for any reasonable project and ready to invoke all my skills for the best results
    Featured Skill Flutter
    Unity
    ECMAScript 6
    API Development
    API Integration
    JavaScript
    Docker
    Golang
    CSS 3
    HTML5
    MongoDB
    React
    Node.js
    jQuery
    C#
  • $35 hourly
    • 4.5/5
    • (25 jobs)
    🌟 With over 7️⃣ years of 🔥 iOS development experience, I specialized in crafting custom user interfaces with a keen eye for detail and a robust understanding of SOLID principles. 💡 Key Skills: 
📱 App Development Experience: • Deep understanding of the app development lifecycle on iOS from concept to deployment 🚀. • Versatile in creating apps, ranging from immersive games to robust enterprise solutions 🎮💼. 🎨 User Interface Design: • Commitment to intuitive and aesthetically pleasing UIs 🖌️. • Expertise in SwiftUI/UIKit and modern interface tools. 🛠️ Development Tools Proficiency: • Highly skilled in Xcode and essential iOS development tools 🗜️. • Experienced in Git and other version control systems for collaborative workflows 👥. 🌐💾 Networking and Database Handling: • Skilled in API integration and server communication 📡. • Proficient with on-device database management and interaction with remote databases 🗃️. 🔍 Testing and Debugging: • Aptitude for thorough code testing, including unit and UI tests ⚙️. • Seasoned in debugging processes to ensure app precision and stability 🛡️. 🚀 Learning and Self-Development: • Passion for continuous learning and staying at the forefront of iOS technology 📚. • Adaptive to industry shifts and app market trends 📈. 
🛠️Technologies: 🏗️ Architectures: • MVC • MVVM • MVP 
 📱 iOS Frameworks: • SwiftUI UIKit / Foundation • MapKit 🗺️ • CoreLocation 📍 • AVFoundation 🎵 • Notification Center 🛎️ • Contacts 👥 • Keychain 🔑 • WebKit 🌐 • ARKit
 🖼️ UI: • SwiftUI • Layout in code • Size classes • Storyboards / XIBs
 🔄 Reactive Paradigm: • Combine • ReactiveSwift/ReactiveCocoa • RxSwift/RxCocoa
 💾 Databases: • Realm • CoreData
 🌎 Networking: • Alamofire • REST API • Moya • Kingfisger
 🚀 SDKs: • Firebase 🔥 • OpenCV • Google Maps SDK 🗺️ • Facebook / Twitter / LinkedIn / Google SDKs 👤🐦💼🔍 • Crashlytics 👷
    Featured Skill Flutter
    RESTful Architecture
    Push Notifications
    MapKit
    Apple Xcode
    iOS
    Model View ViewModel
    MVC Framework
    Firebase
    Firebase Realtime Database
    ChatGPT API
    Core Animation
    ARKit
    App Store
    API
    Core Data
    In-App Subscription
    In-App Purchases
    iOS SDK
    iOS Development
    Native App Development
    UIKit
    SwiftUI
    Swift
  • $40 hourly
    • 4.8/5
    • (12 jobs)
    I’m a passionate developer with 7 years of experience. I’m a full stack developer, but i specialize in the field of mobile systems development. My current work includes machine learning systems on mobile devices and custom navigator applications which include from scratch algorithm development, and I also develop native components for Flutter as well as writing Flutter code. I have an experience of working with small companies as well as governmental clients.
    Featured Skill Flutter
    Smartphone
    Web Application
    Rust
    React Native
    Firebase Cloud Firestore
    Android
    iOS
    Kotlin
    AWS Lambda
    Objective-C
    Swift
    C++
  • $35 hourly
    • 5.0/5
    • (11 jobs)
    🏆 Top 30 Upwork Mobile App Developers ⏳ 9+ Years of Experience 📈 100+ Delivered Projects 👥 50+ Top-tier Engineers in the Team ✅ 100% Job Success | ⭐ Rated 5.0 by 20+ Clients 👋 Hi! I’m a Mobile App Developer with 9+ years of experience delivering top-tier Mobile App Development solutions for iOS and Android. As a lead mobile app developer, I’ve built and launched 100+ apps, working with startups, mid-sized companies, and enterprise clients in e-commerce, fintech, healthcare, logistics, media, and more. 𝙈𝙮 𝙎𝙠𝙞𝙡𝙡 𝙎𝙚𝙩: I have a Strong problem-solving & debugging skills I specialized in Native iOS & Android development (Swift & Kotlin) with a strong focus on clean architecture & scalable codebase design I have 5 years of experience in Third-party API & SDK integration 🧩 As a native Mobile App Developer, I specialize in Swift, Kotlin, and Java, building scalable, high-performance applications with modern UI/UX. I follow a product-oriented Mobile App Development approach that bridges technical precision with real business outcomes. My role as a Mobile App Developer includes planning, architecture, development, testing, and optimization. 🧪 In my Mobile App Development workflow, I apply CI/CD (GitLab, Fastlane), containerized builds via Docker, and automated testing (unit/UI) on emulators and 40+ real devices. I’ve integrated Face ID, Touch ID, Siri, Alexa, Google Assistant, NFC, and secure cloud-based backends (Firebase, AWS, PostgreSQL). Every app I build as a Mobile App Developer is crafted for stability and long-term growth. 📱 As an iOS Mobile App Developer, I use Swift, SwiftUI, Combine, Objective-C, and CoreData. I develop complex features like App Clips, Apple Pay, TestFlight builds, and multi-threaded data sync. I ensure all iOS apps meet App Store guidelines, support accessibility, and use clean architecture for maintainability. 📲 As an Android Mobile App Developer, I work with Kotlin, Java, and Jetpack Compose. I’ve created apps with live chat, video calling (WebRTC), GPS navigation, streaming, Google Pay, and Stripe integration. I also build MDM solutions, secure local storage, and scalable Mobile App Development pipelines with Firebase and REST APIs. 🛠 I offer full-cycle Mobile App Development — from discovery and prototyping to launch and post-release support. I’ve developed 10+ mobile-first platforms powered by OpenAI & Gemini, B2C tools for the beauty industry, and niche booking and delivery solutions. My experience as a Mobile App Developer helps clients ship faster and scale confidently. 🚀 As a senior Mobile App Developer, I value clean code, performance, accessibility, and App Store Optimization. I use Agile (Scrum/Kanban), monitor KPIs, and keep communication clear and transparent at all stages of Mobile App Development. 🚀 Case Highlights from Our Native App Developers 🩺 Health & Wellness Apps As a Mobile App Developer, I built 10+ healthcare apps for iOS and Android with HIPAA compliance, biometric sensors, and real-time tracking — now used by 500,000+ patients worldwide. Tech stack: Swift, Kotlin, HealthKit, Firebase, AWS A prime example of precision in Mobile App Development for regulated industries. 💳 Fintech & E-Commerce As a Mobile App Developer, I created mobile solutions processing $15M+ annually with PCI DSS-compliant payment systems and 99.98% uptime across iOS & Android. Tech stack: Stripe API, Firebase, CI/CD, MongoDB, Swift, Kotlin Excellence in secure and scalable Mobile App Development for finance and retail. 🧠 Productivity & AI I engineered productivity platforms that helped teams manage over 250,000+ tasks, boosting retention by 37% using custom-built AI automations. Tech stack: AI/ML integration, GCP, REST API, SwiftUI, Kotlin Coroutines A result-driven Mobile App Development approach to intelligent workflows from an experienced Mobile App Developer. 📍 Logistics & Booking As a Mobile App Developer, I launched delivery and booking platforms operating in 60+ cities with 1M+ successful orders, powered by real-time GPS and smart scheduling. Tech stack: Google Maps API, Firebase, GPS modules, Kotlin, Swift Efficient and location-aware Mobile App Development at scale. 📡 IPTV & Video Streaming I developed streaming apps with 100K+ daily viewers, achieving less than 0.8s playback latency and seamless cross-device viewing experience. Tech stack: HLS, ExoPlayer, AVPlayer, AWS Media Services End-to-end Mobile App Development for high-demand media use cases by a seasoned Mobile App Developer. 💬 Social & Fitness As a Mobile App Developer, I released viral social-fitness apps with 2M+ downloads, featuring live chat, fitness tracking, and gamified UX that increased DAU by 45%. Tech stack: WebSockets, HealthKit, Firebase Realtime DB, Swift, Kotlin Community-driven Mobile App Development with measurable impact. 📩 Let’s connect if you’re looking for a Mobile App Developer who’s technical.
    Featured Skill Flutter
    Google Maps API
    Android App Development
    Mobile App Design
    Mobile App Bug Fix
    SwiftUI
    Mobile App
    Native App Development
    Smartphone
    iOS Development
    Mobile App Development
    iOS
    Android
    Swift
    Kotlin
  • $35 hourly
    • 5.0/5
    • (6 jobs)
    ✅ Flutter Mobile App Developer with 6+ years of experience; ✅ Master's degree in Software Development; ✅ Developed from scratch 2 crypto apps - mobile exchange and wallet; ✅ In general developed 8+ apps which were successfully deployed to google and apple stores. I am an Expert Flutter Mobile App Developer with 6 years of experience and I develop beutiful apps for Android and iOS . I'm proficient in Dart . I don't do FlutterFlow . A lof of my apps use Lavarel backend. But if you don't want to implement a backend then we can use Firebase . I don't do Full stack ( full-stack , fullstack ) development. I prefer Flutter to React Native in mobile development because I don't lile JS. Most of websites for my apps written in React , WordPress . 🛠 Technologies: Flutter: Flutter Framework, flutter_riverpod, provider, flutter_bloc, flutter_redux + redux_think, dio, freezed, hooks_riverpod + flutter_hooks, auto_route, centrifuge, web_socket_channel, flutter cryptography libraries, signalr_core. Firebase: Firebase services - cloud messaging/dynamic links/crashlytics/remote config/analytics.
    Featured Skill Flutter
    Dart
    Location-Based Service
    In-App Purchases
    iOS Development
    User Profile Creation
    Tablet
    React Native
    User Authentication
    Firebase
    Android App Development
    Smartphone
    Android
    iOS
    Mobile App Development
  • $35 hourly
    • 4.9/5
    • (25 jobs)
    𝐇𝐢, 𝐈’𝐦 𝐋𝐞𝐯! 👋 With over a decade of experience in mobile app development, I specialize in using React Native to build cross-platform apps that deliver exceptional performance on iOS, Android, and beyond. From mobile devices to Android TV, Apple TV, Roku, and Amazon Fire TV, I create apps designed to work seamlessly across multiple platforms. Whether you’re launching a new idea or need to expand your app’s reach, I’m here to help bring your vision to life. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫 ▪️ Develop high-quality cross-platform apps for iOS and Android using Flutter/React Native. ▪️ Build custom apps for Android TV and Apple TV with smooth performance and user-friendly interfaces. ▪️ Create apps from the ground up—whether it’s an MVP or a fully-featured, multi-functional app for mobile or TV platforms. ▪️ Write clean, scalable, and maintainable code that’s easy to update and aligned with industry best practices. 🚀 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ▪️ Extensive experience in mobile and TV app development, including expertise in Android TV and Apple TV. ▪️ In-depth knowledge of Flutter’s architecture and the Dart programming language. ▪️ In-depth knowledge of React Native's architecture . ▪️ Proficient in real-time data integration, API connectivity, and third-party services. ▪️ Skilled in designing high-performance apps with exceptional UI/UX, delivering seamless experiences on both mobile and TV platforms. 🔍 𝐊𝐞𝐲 𝐒𝐤𝐢𝐥𝐥𝐬 & 𝐓𝐨𝐨𝐥𝐬 ▪️ Flutter & Dart for mobile and TV app development ▪️ React Native for mobile and TV app development ▪️ Expertise in Android TV & Apple TV apps ▪️ Firebase for real-time data and push notifications ▪️ API integration and backend communication ▪️ UI/UX design principles for intuitive and visually engaging apps ▪️ Cross-platform development for iOS, Android, Android TV, and Apple TV 💬 𝐋𝐞𝐭’𝐬 𝐁𝐫𝐢𝐧𝐠 𝐘𝐨𝐮𝐫 𝐈𝐝𝐞𝐚 𝐭𝐨 𝐋𝐢𝐟𝐞 Looking for a dependable Flutter / React Native developer to create a world-class mobile or TV app? 𝐈’𝐦 𝐡𝐞𝐫𝐞 𝐭𝐨 𝐡𝐞𝐥𝐩! 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞, 𝐚𝐧𝐝 𝐥𝐞𝐭’𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐡𝐨𝐰 𝐰𝐞 𝐜𝐚𝐧 𝐭𝐮𝐫𝐧 𝐲𝐨𝐮𝐫 𝐯𝐢𝐬𝐢𝐨𝐧 𝐢𝐧𝐭𝐨 𝐫𝐞𝐚𝐥𝐢𝐭𝐲. 🤝
    Featured Skill Flutter
    Kotlin
    Swift
    Native App
    tvOS
    Roku Development
    Android App
    Android
    iOS Development
    iOS
    Supabase
    Firebase Realtime Database
    Firebase
    Mobile App
    React Native
  • $40 hourly
    • 5.0/5
    • (18 jobs)
    Looking for a top-tier React developer to bring your web or mobile app idea to life? You've just found your team. We are a group of senior React developers with years of experience building scalable, production-ready applications using React, React Native, Next.js, TypeScript, and GraphQL — both for startups and enterprises. Whether you need a blazing-fast frontend for your SaaS product, a robust backend to support millions of users, or a complete full-stack web development solution — we’ve got you covered. ✅ 𝐖𝐡𝐚𝐭 𝐖𝐞 𝐃𝐨 We specialize in modern web development with React and related technologies: - React.js for interactive, dynamic web interfaces - Next.js for SEO-optimized, high-performance apps - TypeScript for safer and maintainable code - GraphQL and REST APIs for seamless data integration - Node.js / Python backends to power your applications - UI Libraries: TailwindCSS, Chakra UI, Material UI - Tooling: Webpack, Vite, Babel, ESLint Our applications range from eCommerce dashboards, SaaS admin panels, and CRM platforms, to health tech, crypto, and AI-powered solutions We’ve helped clients who were previously stuck with WordPress-based setups migrate to React for better performance, maintainability, and user experience. Our work consistently outperforms traditional web server setups or monolithic stacks 💡 𝐖𝐡𝐲 𝐑𝐞𝐚𝐜𝐭? React is more than just a library — it's the foundation of modern frontend development. Compared to legacy technologies like WordPress or overcomplicated frameworks like Angular, React offers unmatched flexibility, reusability, and developer experience. We use React in: - Real-time dashboards - Crypto and DeFi platforms (incl. React + Solidity integrations) - Twilio-powered messaging apps - Internal tools and mobile-first platforms - 3D product viewers using Three.js inside React apps Our developers are also familiar with Vue and Angular, which helps when integrating legacy code or transitioning from existing codebases. 🧠 𝐓𝐞𝐜𝐡 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬: - Full Stack Development with React + Python (FastAPI, Django) or Node.js (Express, NestJS) - Backend Development for APIs and microservices - Integration with Twilio, Stripe, SendGrid, and more - CI/CD, GitHub Actions, and cloud deployments (AWS, Vercel) - Performance optimization and SSR for SEO with Next.js - Modern development workflows using Git, Jira, Notion, Slack We’re often hired to rescue projects that were previously developed by generalists or low-quality vendors. We clean up messy code, implement best practices, and get products ready for production. 🌍 𝐖𝐡𝐨 𝐖𝐞 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 We've worked with clients worldwide — including startups in Silicon Valley, crypto platforms in the EU, and agencies in Uzbekistan, the UK, and Australia. We’ve also supported scaling products by teams like Neoito and helped them ship faster with React-based solutions. 📈 𝐎𝐮𝐫 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 Discovery Call — understand your goals Tech Stack Planning — suggest best-fit tools (React, backend, infra) UX Flow Mapping — we often work directly from Figma Development Sprints — typically 1–2 weeks QA + Review — thorough testing and iteration Deployment — via Vercel, Netlify, or your preferred platform We work in agile, and adapt easily to your team’s structure — whether you use GitHub, Notion, ClickUp, or Trello. 🛠𝐒𝐚𝐦𝐩𝐥𝐞 𝐔𝐬𝐞 𝐂𝐚𝐬𝐞𝐬 SaaS Dashboard: Role-based dashboards, real-time data, analytics Crypto Dapp: React frontend, Solidity contracts, Web3 integration eLearning Platform: Frontend in React, backend in Python, Stripe payments Custom CMS: Built from scratch using Next.js + PostgreSQL Internal CRM: Built using React + Retool for low-code scalability 💬 Let’s Talk Whether you’re building something from scratch or need help scaling your existing product — we’re here to help. We pride ourselves on clear communication, speed, and code quality. Let’s build your next product — the right way
    Featured Skill Flutter
    App Development
    CRM Development
    Dashboard
    Low-Code Development
    Back-End Development
    Front-End Development
    Mobile App Development
    Golang
    Full-Stack Development
    Python
    JavaScript
    React
    Node.js
    Web Development
  • $45 hourly
    • 5.0/5
    • (3 jobs)
    I deliver top-notch Flutter mobile/web apps, developed in simple, crisp, transparent way with tests, documentation and automation, which are easy to pick up for other devs. With 11 years of experience, including 5 years in Flutter and 6 years in Android, I have been involved in diverse projects spanning medical assistance, survey services, fitness communities, food pre-ordering, network protection, and fintech. I've had the honour of contributing to the growth of widely-loved products, including Medisafe, Wio, and Luxtrust. Also, I've played a crucial role in the successful launch of MVPs for startups, with notable achievements like Totalfit. As my own product I launched - Gladdy, which has garnered positive reviews: ⭐This is an super awesome and simple app I truly love it⭐ ⭐The app is really good keep it going👍⭐ ⭐Just the perfect app for daily activities track and to do list planner⭐ 🌟 Working with me, you will: ★ Partner with an experienced full-stack developer with 11 years of expertise in Flutter and Android. ★ Avoid reinventing the wheel, benefiting from my expertise in leveraging existing solutions. ★ Cease struggling with planning, as I provide a structured and iterative approach. ★ Steer clear of unnecessary complexities, ensuring straightforward and effective solutions. ★ Enjoy 24/7 reliable and transparent communication throughout our collaboration. ★ Receive a dependable and high-quality code base, built with precision and best practices. ★ Achieve a sunning app, combining functionality with a beautiful design 🌟 What your project will gain from my Technical skillset: ⭐ Fast and efficient mobile/web development process, by ✅ Experience of building entire apps ecosystem from a single code base ⭐ System reliability, by
 ✅ Set up frameworks for Integration, Unit, Golden tests ⭐ Measured code quality, by ✅ CI pipelines with automated lint code quality validation ⭐ Effortless app deployment, by
 ✅ Automated AppStore/Google play deploy with Fastllane ⭐ Extendable Code base, which is easy to support, by
 ✅ Domain/Feature based architecture ⭐ Save time and costs on running pipelines, by
 ✅ CI/CD pipeline time optimisation for feature based architecture ⭐ Secure and complete backend with authentication, by ✅ Server-less backend with Firebase: Auth, Firestore, Messaging, Storage ⭐ Excessive in-app information, by ✅ Analytics reports: Mixpanel, Sentry, Crashlytics ⭐ Handy localisation, by 
 ✅ Custom tools for localisation code generation ⭐ Flexibility in app changes without version upgrade, by ✅ Server driven UI, feature toggling ⭐ Know your customers better, by ✅ A/B testing, remote config Let’s schedule a 10 minutes introduction call to discuss your project and ensure that we will be a good fit.
    Featured Skill Flutter
    Social Networking Development
    Database Architecture
    Serverless Computing
    CI/CD
    Automation
    Mobile App Development
    iOS
    SQLite
    Node.js
    User Authentication
    In-App Purchases
    Android
    Firebase
    In-App Advertising
  • $50 hourly
    • 5.0/5
    • (1 job)
    Hello! I’m Anna, and I proudly represent Anadea, a company with over 20 years of solid development expertise. 🎉 At Anadea, we specialize in a diverse array of projects, focusing on Machine Learning 🤖 and Artificial Intelligence 🌟 initiatives, bespoke web and mobile development 📱💻, modern UI/UX design 🎨, comprehensive quality assurance ✅, and strategic system administration 🖥️. My role is to guide you through the entire project lifecycle, from inception to completion, while customizing our approach to fit your unique needs and objectives. I am genuinely excited about the prospect of collaborating with you to transform your vision into reality. Leveraging our extensive industry knowledge and technical skills, we strive for successful outcomes that not only meet but exceed your expectations. Together, let's bring your ideas to life! 🚀 Our Industry Expertise Includes: Real Estate 🏘️: Developing innovative platforms for property management and listings. eLearning 🎓: Creating interactive and engaging educational tools. FinTech 💳: Building secure and robust financial applications. Retail & eCommerce 🛒: Enhancing the online shopping experience with customized solutions. Oil & Gas ⛽: Implementing reliable systems for industry efficiency. Logistics & Supply Chain 📦: Streamlining operations with smart tech solutions. Sports & Fitness 🏃‍♂️: Designing applications that promote healthy lifestyles. Healthcare 🏥: Delivering tech solutions focused on patient care and management. Automotive 🚗: Creating applications that enhance the driving experience. Travel ✈️: Crafting tools that simplify travel planning and bookings. Human Resources 👔: Developing platforms that optimize recruitment and employee management. Media & Entertainment 🎨: Building engaging content delivery systems. Technological Mastery: I am skilled in a variety of technologies which we employ to bring your projects to fruition. Our frontend expertise includes advanced frameworks and languages such as HTML5, CSS3, JavaScript (ES5/ES6), React, Angular, and Vue. On the backend, we utilize Ruby on Rails, Java, Python, and Node.js, ensuring robust server-side functionality. ⚡️ Additionally, we produce mobile applications across platforms, including Android (Java, Kotlin), iOS (Objective-C, Swift), and cross-platform solutions like Flutter and React Native. Our proficiency in database management covers systems like PostgreSQL, MySQL, and MongoDB. 📊 For quality assurance, we implement automation testing with frameworks such as Selenium, while also ensuring security with comprehensive testing techniques utilizing tools like BurpSuite and Kali Linux. 🔒 Furthermore, we leverage cloud solutions ☁️ across platforms including AWS, Azure, and Google Cloud to ensure scalable and efficient application deployment. Our AI & Machine Learning Expertise includes working with advanced frameworks such as TensorFlow, PyTorch, Keras, and Scikit-learn, enabling us to build intelligent models for various applications, including predictive analytics, natural language processing (NLP), image recognition, and recommendation systems. We also utilize Pandas, NumPy, and OpenCV to process and analyze large datasets efficiently, ensuring high-performance solutions. Whether it's automating workflows, enhancing decision-making with AI-driven insights, or deploying cutting-edge computer vision and NLP models, we harness the full potential of AI to drive innovation in every project. 🚀 Technologies: ⚡️ 𝗙𝗿𝗼𝗻𝘁 𝗲𝗻𝗱: HTML5, CSS3, SASS, LESS, JavaScript ES5/ES6, React, Angular, Redux, Mobx, Apollo GraphQL, Webpack, NextJS, NestJS, Vue, Redux-Toolkit, Zustand, Vite, Tailwind CSS, Styled Components ⚡️ 𝗕𝗮𝗰𝗸 𝗲𝗻𝗱 & 𝗦𝗲𝗿𝘃𝗲𝗿𝘀: Ruby on Rails, Ruby, Java, Scala, Spring, Kotlin, Python, Golang, C#/.Net, Node.js, Apache, Tomcat, Nginx ⚡️ 𝗠𝗼𝗯𝗶𝗹𝗲 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: Android (Java, Kotlin), iOS/OSX/WatchOS (Objective-C, Swift), React Native, Flutter ⚡️ 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: PostgreSQL, MySQL, MongoDB, Apache Solr, Elasticsearch ⚡️ 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Ruby, Python, Selenium WebDriver, Cucumber, Rspec, Capybara, Pytest, CI (Jenkins, Circle CI, Drone CI), Katalon Studio, Cypress, WebdriverIO ⚡️ 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝘁𝗲𝘀𝘁𝗶𝗻𝗴: OWASP Top 10, CWE Top 25, Exploit-DB; 𝗧𝗼𝗼𝗹𝘀: Kali Linux, ZAP, BurpSuite, Nmap, WPScan, Sqlmap, Dirbuster ⚡️ 𝗠𝗼𝗯𝗶𝗹𝗲 & 𝗔𝗣𝗜 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Postman, Charles, Braze, Fabric.io, GraphQL, Firebase Test Lab, Calabash ⚡️ 𝗔𝗿𝘁𝗶𝗳𝗶𝗰𝗶𝗮𝗹 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲: TensorFlow, PyTorch, Keras, Scikit-learn, Pandas, NumPy, OpenCV, NLTK ⚡️ 𝗔𝗣𝗜: WebRTC, Payment Gateways, Mail Services ⚡️ 𝗖𝗹𝗼𝘂𝗱 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP), IBM Cloud, Oracle Cloud, Docker, Kubernetes
    Featured Skill Flutter
    FlutterFlow
    Ruby on Rails
    Full-Stack Development
    Python
    Mobile App Development
    Web Development
    React Native
    React
    UX & UI
    Web Application
    Web Design
    Artificial Intelligence
    Machine Learning
    Machine Learning Model
  • $40 hourly
    • 5.0/5
    • (7 jobs)
    Hey there 👋 I am Mykhailo and a seasoned mobile app developer with 7+ years of experience leveraging cutting-edge technologies. I'm adept at transforming mobile app ideas into real-world solutions that captivate users. My expertise extends across native ios development with Swift & Objective-C, and cross-platform mobile development for diverse platforms like Android, iOS, web, and desktop using Flutter/FlutterFlow and React native. 🚀 Specific expertise is as follows: Real-time tracking mobile app E-learning platform On-demand service & delivery mobile app Real estate/property management mobile app Marketplace mobile app E-commerce store Medical/healthcare mobile app Database management & manipulation of mobile app Financial management mobile app Why Choose Me? 🚀 In step with Technology: Constantly seeking and swiftly implementing new tech solutions. 💡 Innovative Solutions: Delivering inventive solutions, driving project advancement. 🕒 24/7 in Touch: Available for project discussions and issue resolution 📈 Results-Driven: Committed to achieving tangible outcomes and exceeding expectations. 💼 Client-Centric: Dedicated to understanding and fulfilling client needs with tailored solutions. 🔍 Attention to Detail: Ensuring accuracy and precision in every aspect of project execution. Ready to build your dream mobile app? I'm eager to collaborate and bring your vision to life. Contact me!
    Featured Skill Flutter
    Firebase
    Google Maps
    In-App Purchases
    Social Media Account Integration
    Payment Gateway Integration
    Push Notifications
    User Authentication
    Smartphone
    FlutterFlow
    React Native
    Swift
    Android
    iOS
    Mobile App Development
  • $40 hourly
    • 5.0/5
    • (12 jobs)
    💯 Upwork 100% Job Success Score, Top Rated- Top 1%
 🥇 Awarded "Top Software Developers" by Clutch
 ✅ 5+ Years Of Experience 💸 Fluent English
 I've got over 5 years of hands-on experience in software development, plus 2+ years as a tech lead. I'm all about JavaScript (React, TypeScript, Redux, Redux Toolkit, Next.js, Express, Nest.js), iOS, and Android development, with a knack for crafting smooth OpenAI integrations. Here's the gist of what I've achieved: Led successful projects with cutting-edge tech. Delivered top-notch mobile apps for iOS and Android. Pro at Scrum and Kanban for streamlined dev. Quick to adapt and solve complex problems. Let's up your tech game together! Connect with me, and let's get innovative. Best, Yaroslav B.
    Featured Skill Flutter
    Redux
    AWS CodePipeline
    AWS CodeDeploy
    AWS CodeBuild
    AWS Lambda
    NestJS
    ExpressJS
    TypeScript
    GraphQL
    React Native
    React
    Node.js
    JavaScript
  • $40 hourly
    • 5.0/5
    • (8 jobs)
    Highly skilled Web Developer with over 5 years of experience designing and implementing complex software solutions. Proficient in a wide range of programming languages and frameworks, including React, Angular, Node, and etc. Strong problem-solving and analytical skills, with a passion for learning new technologies and keeping up with industry trends. Here are my skills. ⭐ languages: HTML, CSS, PHP, JavaScript, TypeScript, Python, SCSS, SASS, LESS ⭐ front-end: React, Redux, Next.js, Angular ⭐ back-end: Laravel, Node/Express, Python/Django ⭐ others: Tailwind CSS, styled-component, three.js, fabric.js, MUI, Antd, Bootstrap5 Also, I focus on: ⭐ High quality, clean, well-written, well-commented code. ⭐ Well designed Database with perfect project architecture/structure ⭐ Fast development time within the deadline. ⭐ Fast response and always available to talk. ⭐ Flexible working time, report day-by-day. ⭐ Negotiable, self-motivation. Thank you for your reading. Best regards
    Featured Skill Flutter
    Instagram API
    ChatGPT API Integration
    React Native
    React
    FastAPI
    Tailwind CSS
    Node.js
    Ruby on Rails
    Django
    TypeScript
    Angular
    Vue.js
    Next.js
  • $40 hourly
    • 5.0/5
    • (5 jobs)
    𝐓𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 𝐰𝐢𝐭𝐡 𝐓𝐚𝐢𝐥𝐨𝐫𝐞𝐝 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 💼 At Krasty Soft, we specialize in Retool development, helping businesses achieve operational excellence through low-code solutions. Our expertise lies in building custom dashboards, CRMs, analytics tools, and internal business applications that streamline workflows and boost productivity. By leveraging Retool’s low-code capabilities alongside React, Python, and Flutter, we create scalable and efficient software tailored to your specific needs. Whether you’re looking to automate processes, integrate data sources, or enhance decision-making, our Retool-powered solutions enable faster development with seamless functionality. 𝐔𝐬𝐢𝐧𝐠 𝐑𝐞𝐭𝐨𝐨𝐥 𝐟𝐨𝐫 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐥𝐨𝐰 𝐜𝐨𝐝𝐞 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 As skilled Retool developers, we specialize in creating powerful low-code internal tools tailored to businesses of all sizes. Our expertise includes building dashboards, CRMs, inventory management systems, admin panels, and data management platforms that streamline operations and improve efficiency. By leveraging Retool’s low-code capabilities, we develop seamless integrations with SQL Server, APIs, and existing business systems, ensuring fast, scalable, and reliable performance. The drag-and-drop functionality of Retool allows us to quickly design custom workflows, from approval processes to eLearning platforms, significantly reducing development time and costs. Additionally, when projects require extra flexibility, we incorporate Appsmith, expanding the possibilities of low-code development to create highly adaptable solutions. Whether you're looking to optimize workflows, automate tasks, or enhance business intelligence, we deliver impactful Retool-powered applications that drive growth and efficiency. 𝐂𝐫𝐞𝐚𝐭𝐢𝐧𝐠 𝐌𝐨𝐝𝐞𝐫𝐧 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐰𝐢𝐭𝐡 𝐑𝐞𝐚𝐜𝐭 As experienced React developers, we specialize in building high-performance, user-focused web applications designed for scalability. Whether it's creating eCommerce solutions, single-page applications (SPAs), or multi-page applications (MPAs), we leverage React's component-driven approach and tools like Redux, Next.js, and React Query to deliver exceptional results. Our skills also encompass other frameworks such as Vue and Angular, ensuring flexibility for diverse project needs. With modern UI libraries like Material UI and TailwindCSS, we craft visually appealing, user-friendly designs. Anything with Javascript we can do :slightly_smiling_face:. From seamless WordPress integrations to cutting-edge progressive web apps (PWAs), we have the expertise to bring your vision to life. 𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐁𝐚𝐜𝐤𝐞𝐧𝐝𝐬 𝐰𝐢𝐭𝐡 𝐏𝐲𝐭𝐡𝐨𝐧 𝐚𝐧𝐝 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐟𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 With deep expertise in Python, we deliver robust and scalable backend solutions tailored to handle complex business workflows. Leveraging frameworks like Django, Flask, and FastAPI, we excel in developing APIs, data processing systems, and seamless machine learning integrations. Our experience spans working with databases such as PostgreSQL, NoSQL, and MongoDB, while ensuring scalability and reliability through deployment on AWS and Docker. We build integrated systems that empower enterprise-grade applications and enable real-time functionality by combining Python with front-end technologies like React and additional programming languages such as Java and JavaScript. 𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩𝐬 𝐰𝐢𝐭𝐡 𝐅𝐥𝐮𝐭𝐭𝐞𝐫📱 We deliver stunning cross-platform mobile applications using Flutter, enabling consistent performance across Android and iOS. Our Flutter apps feature real-time data synchronization, intuitive UI/UX, and seamless integration with backend systems. Whether you need an eCommerce app, a healthcare solution, or a robust enterprise mobile app, our Flutter expertise ensures reliable and scalable results. 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐔𝐬? 🤔 🔹In-house team of certified Retool developers. 🔹Proficiency in Retool low-code platform, React.js, Python, Go, and Flutter. 🔹Proven experience building dashboards, CRMs, and data analytics tools. 🔹Scalable, secure, and cost-effective solutions tailored to your business. Ready to transform your operations? Let’s discuss how we can bring your ideas to life!
    Featured Skill Flutter
    NodeJS Framework
    No-Code Development
    CRM Development
    Back-End Development
    Front-End Development
    Analytics Dashboard
    Dashboard
    API
    Low-Code Development
    Golang
    Python
    Node.js
    React
    Full-Stack Development
  • $40 hourly
    • 5.0/5
    • (27 jobs)
    Hello and welcome! I’m a Top Rated full-stack developer with over 12 years of experience in WordPress, Laravel, Web3, API integrations, and mobile development using Cordova and Flutter. I focus on delivering tailored solutions that help businesses grow and scale efficiently. My expertise includes: WordPress and WooCommerce – custom themes, plugins, and API integrations Laravel – scalable backend development and RESTful APIs Mobile app development – cross-platform solutions with Cordova and Flutter Web3 development – blockchain integrations and smart contracts Custom solutions – solving complex problems with innovative approaches I take an individual approach to every project, ensuring that each client's unique challenges are addressed with the best possible solutions. Instead of listing achievements, I let my work speak for itself by helping clients achieve their business goals efficiently and professionally. Let’s build something great together. Best regards, Volodymyr
    Featured Skill Flutter
    Craft CMS
    Webflow
    Blockchain
    WordPress e-Commerce
    API
    Page Speed Optimization
    Web3
    Apache Cordova
    Browser Extension
    Laravel
    PHP
    WordPress Plugin
    JavaScript
    WordPress
  • $45 hourly
    • 5.0/5
    • (2 jobs)
    I am a seasoned web and mobile app developer with over 8 years of experience designing, developing, and deploying cutting-edge web and mobile applications. I have helped many companies take an idea and turn it into a product that serves thousands to millions of users. Known for building fast and exceptionally well, I can work on either end of the stack.
    Featured Skill Flutter
    Android
    Firebase
    FlutterFlow
    SwiftUI
    React Native
    Mobile App Development
    iOS Development
    Swift
    PostgreSQL
    JavaScript
    React
    Kotlin
    Node.js
    Java
  • $60 hourly
    • 5.0/5
    • (2 jobs)
    Hi everyone, I am a senior mobile and web fullstack developer with over 6 years of experience in React/Vue, React Native, NextJS, Flutter, Swift, Java, Kotlin. React : 9.5/10, +6 years Vue: 9.5/10, +6 years React Native: 9.5/10, + 6 years NextJS: 9/10, +5 years Flutter: 9/10, +5 years Swift/SwiftUI: 9/10, +5 years Java/Kotlin: 8/10, +4 years TailwindCSS: 9/10, + 5 years Typescript: 9/10, + 5 years Node/Firebase: 9/10, +6 years Also, I’m hands-on with project architecture, always considering the best technology and approach to optimize time, resources, and costs. My expertise covers a wide range of technologies, including JavaScript/TypeScript, ReactJS/VueJS, and NodeJS, in both front-end and back-end development. I am available to work full time in any timezone. Let's get in touch. Thank you.
    Featured Skill Flutter
    Vue.js
    Node.js
    AWS Amplify
    Firebase
    Web Development
    iOS Development
    Android App Development
    SwiftUI
    Swift
    Redux
    React Native
    React
    Kotlin
    Java
  • $43 hourly
    • 5.0/5
    • (2 jobs)
    With 4+ years of experience in mobile app development, I specialize in building high-performance applications for iOS and Android. My expertise spans React Native, Flutter, Swift, Kotlin, and Java, allowing me to deliver seamless cross-platform and native solutions tailored to various industries. In addition to traditional mobile development, I integrate AI/ML technologies into mobile applications, implementing features like image recognition, voice synthesis, and personalized AI-driven experiences. This approach enhances user engagement and enables smarter, more intuitive app interactions. I have successfully developed and optimized apps in domains like social networking, booking platforms, fitness, e-commerce, productivity tools, and AI-powered applications. My focus is on scalable architecture, clean code, and user-centric design, ensuring both functionality and long-term maintainability. I believe in clear communication, efficiency, and long-term collaboration with my clients. If you need a reliable developer to bring your mobile app idea to life, let’s connect!
    Featured Skill Flutter
    Image Processing
    OpenCV
    AI Speech-to-Text
    Machine Learning
    TensorFlow Lite
    AWS Amplify
    Firebase
    Java
    Mobile Game
    Swift
    Kotlin
    React Native
    Android
    iOS
  • $36 hourly
    • 5.0/5
    • (3 jobs)
    👋 Hello Clients! I’m a seasoned Mobile App Developer specializing in Android and iOS applications, with 8+ years of experience delivering high-performance, cross-platform, and native mobile solutions. I combine engineering precision, creative UX design, and cutting-edge AI innovation to craft world-class mobile experiences. 🚀 What I Bring to Your Mobile Project: ✅ Cross-Platform & Native Mobile App Development ➜ Flutter, React Native (Android & iOS) ➜ Native Android (Kotlin, Java) & Native iOS (Swift, SwiftUI) ➜ WebRTC, LiveKit, Twilio, VoIP Integration (Real-Time Audio/Video Communication) ➜ Push Notifications (FCM, APNs), In-App Messaging, Multimedia Streaming ➜ AI-Enhanced Mobile Apps (Voice Assistants, GPT-powered features) ✅ Frontend & Backend for Mobile Apps ➜ Frontend: React Native, Flutter, Swift, Kotlin ➜ Backend APIs: Node.js, Django, FastAPI, Firebase, Supabase ➜ Secure Authentication: OAuth2, JWT, Social Logins (Google, Apple, Facebook) ✅ AI & Real-Time Features for Mobile ➜ AI Chatbots & Voice Agents integrated inside apps (OpenAI, Retell.ai, VAPI) ➜ Real-Time Messaging & Live Streaming with WebSocket, WebRTC ➜ RAG Pipelines and Personalized AI Recommendations for mobile users ✅ Cloud, Databases, and Deployment ➜ Firebase, Firestore, PostgreSQL, Supabase ➜ AWS Amplify, Google Cloud, App Store & Play Store Deployment ➜ Docker, Kubernetes (for scalable backend services) ✅ Payments and Subscriptions ➜ Stripe Mobile SDK, PayPal Integration ➜ In-App Purchases (iOS & Android), Subscription Management ✨ Why Clients Trust Me with Their Mobile Apps: 🔹 Mobile-First Mindset: Every app I build is designed for smooth performance, elegant UI/UX, and scalability across Android and iOS devices. 🔹 AI Innovation Inside Apps: I can enhance your app with intelligent features like voice agents, chatbots, and personalized user journeys. 🔹 Full-Lifecycle Partnership: From planning and architecture to App Store launch and beyond — I’m with you at every step. 🔹 Fast & Transparent Communication: Clear updates, quick responses, and full project visibility. 🔹 Ready to Start Immediately: Available to dive in and deliver tangible results from Day 1! 🛠️ Technical Keywords Android, iOS, Flutter, React Native, Swift, Kotlin, Java, WebRTC, Live Streaming, Voice AI, AI Chatbots, OpenAI, Firebase, Firestore, Supabase, AWS Amplify, Stripe Mobile Integration, In-App Purchases, FastAPI, Django, Node.js, Docker, Cloud Deployment, Real-Time Communication, Push Notifications, Mobile App Architecture, App Store Submission, Play Store Launch.
    Featured Skill Flutter
    CI/CD
    Firebase
    OAuth
    OpenAI API
    AI Agent Development
    FreeSWITCH
    Twilio
    WebRTC
    iOS Development
    App Development
    SwiftUI
    Swift
    Kotlin
    React Native
  • $45 hourly
    • 5.0/5
    • (2 jobs)
    Are you looking for a senior engineer who can deliver cutting-edge software solutions across full-stack, AI, blockchain, and trading domains? You’re in the right place. I'm a Senior Software Engineer with 7+ years of hands-on experience leading complex tech initiatives from MVP to enterprise scale. I specialize in: 🔹 Full Stack Development: Expert in MERN, Java, Go, Rust, Tauri, and cloud platforms (AWS, GCP, Azure). I build robust web apps, mobile solutions, and desktop platforms with seamless UX and scalable architecture. I also offer no-code/low-code development using Shopify, WordPress, and Bubble.io for fast iterations. 🔹 AI & Machine Learning: Proficient in Generative AI (LLMs), NLP, and custom model fine-tuning using frameworks like TensorFlow, PyTorch, NumPy. I’ve integrated advanced AI features into SaaS apps, chatbots, sports simulations (e.g., NFL draft AI), and enterprise tools. 🔹 Blockchain Development: From DeFi protocols to DAOs and NFT marketplaces, I’ve engineered full-cycle Web3 applications using Ethereum, Solidity, smart contracts, DApp integration, and real-world asset (RWA) tokenization. 🔹 Automated Trading Systems: I build high-frequency trading bots and arbitrage systems for Forex and Crypto markets using platforms like MT4, MT5, NinjaTrader, and TradingView APIs. Bots include grid, sniping, scalping, and AI-assisted copytrading. What I Offer ✅ Rapid MVPs with clean, secure code ✅ Transparent communication & fast iterations ✅ Long-term availability & maintenance ✅ Clean handoff documentation Special Projects ⚽ Sports betting prediction & trading automation 📈 Real-time arbitrage bot across crypto exchanges 🏛️ DAO platform for decentralized governance 🛒 Shopify & WordPress eCommerce with custom plugins Let’s Build Something Powerful Whether you're a startup founder, enterprise CTO, or investor in need of robust systems—I bring both strategic insight and senior-level engineering. 📬 Drop me a message to discuss how I can add value to your project.
    Featured Skill Flutter
    ASP.NET
    MERN Stack
    Forex Trading
    Cryptocurrency Trading
    Smart Contract Development
    Rust
    Stripe
    Python
    Java
    Machine Learning
    AI App Development
    Blockchain, NFT & Cryptocurrency
    Golang
    Full-Stack Development
  • $40 hourly
    • 5.0/5
    • (8 jobs)
    15+ years of experience in building, delivering, and supporting tech projects, I’ve helped to create and maintain dozens of online communities, membership platforms, collaboration systems, eCommerce websites, marketplaces, and more. I can transform any project idea, turn it into MVP (minimal viable product) and then scale it into thriving business. I’m a co-founder of WebHive and a project manager with a development background. I hold a Master’s degree in Computer Science, specializing in AI algorithms. WebHive is an experienced team that has worked together for more than 10 years—efficient, reliable, and always willing to go the extra mile to deliver outstanding products. The development focus is on modern app, communities, online contests, ecommerce websites and marketplaces Recent Projects - Built a platform for custom niche communities – HubMachine.com - Created the largest performing arts community with 40000+ members from MVP to industry leader – (CircusTalk.com, now StageLync.com) - Created an online events platform that connects creatives with judges for video reviews – ReviewPortfolios.org - Developed and maintain an Innovative social media sharing platform for eCommerce – Insp.no - Became TechStars finalist with AI-driven intake service for employment law firms - Thurgood.com - Built and integrated with maps two apartment rental platforms – (RoomSpace.com, Renters.ro) - Worked on smart recommendation systems for rental and events platforms, using data-based algorithms (Full Stack Developer role) - Created iOS & Android apps (Flutter + Laravel API) – including community apps, eCommerce apps, and business apps for social media scheduling Experience Highlights - Integrated PayPal, Stripe, Vipps, and other payment systems for eCommerce & subscription projects - Navigated complex App Store reviews and integrated Facebook Graph API, YouTube API, TikTok API - Managed a simultaneous event across 12 cities & different time zones - Developed interest-matching & recommendation algorithms - Upgraded legacy projects to modern tech stacks without downtime - Built & maintained 25+ plugins & themes for SocialEngine (our team was recognized as a recommended developers) - Implemented bulk newsletters & SMS campaigns - Handled DDoS and spam bot attacks with smart algorithms - Delivered urgent key features for investor demos under tight deadlines - Developed multiple MVPs (Minimum Viable Products) as a Full Stack Developer & Manager for startups I've built project from scratch to MVP and from MVP to industry leaders and TechStars finalists I don’t just assist with planning and development—I strategize ways to improve your original idea and maximize its potential. Let’s see what great things we can build together! 🚂
    Featured Skill Flutter
    Back-End Development
    Front-End Development
    API Integration
    SQL
    JavaScript
    Laravel
    Project Management
    UX & UI
    App Development
    Mobile App
    Web Development
    Web Design
    WordPress
    Website
  • $45 hourly
    • 5.0/5
    • (72 jobs)
    I'm 17 years in mobile development, so I know what makes apps grow - and what kills them! I build clean, scalable mobile apps that actually grow your revenue 💸 Because if your product wins, we both win Apps I’ve built have: 📱 Hit 10M+ downloads 💰 Helped raise $5M+ ⭐️ Averaged 4.8+ ratings on the App Store & Google Play 🧠 900K+ monthly active users in mental health, productivity & social apps 🚀 Time-to-market cut by 30% thanks to scalable Flutter architecture 🛠️ 80+ production apps shipped, from MVPs to enterprise-grade tools 🏦 Trusted by Bank of America, Citibank, Netflix, Spotify Core Skills: ☑️ Cross-Platform: Flutter, React Native, Compose Multiplatform ☑️ iOS: Swift, Objective-C, SwiftUI, UIKit ☑️ Android: Kotlin, Java, Jetpack Compose ☑️ Backend: FastAPI, Django, Spring Boot, Node.js ☑️ Tools: Firebase, Stripe, Google Maps, RESTful APIs, CI/CD, Git, Figma Let’s build an app that actually grows your business - not just dev bill. Drop me a message. Let’s talk.
    Featured Skill Flutter
    Flutter Stack
    Mobile Development Framework
    Mobile App
    Android
    iOS
    AI Mobile App Development
    Mobile App Improvement
    Kotlin
    Mobile App Development Consultation
    Mobile App Development
    Python
    Swift
    Android App Development
    iOS Development
  • $35 hourly
    • 5.0/5
    • (10 jobs)
    💛💙Greetings! We are Ukrainian Software Development Team💙💛 We are AndRud-Software, a dynamic mobile and web development team with a passion for turning your ideas into exceptional digital solutions. With a wealth of combined experience and a focus on aligning with your business objectives, we're here to exceed your expectations. Why Collaborate with Our Mobile Development Dream Team? ✅ Diverse Expertise: Our talented team of developers specializes in iOS, Android, Flutter, GraphQL, Postgres, Docker, Node.js, Firebase, and more. Whatever your platform, we've got the skills to make it happen. ✅ End-to-End Solutions: From concept to launch, we offer a complete range of services, including concept development, design, development, testing, deployment, and ongoing support. ✅ User-Centric Design: We understand the importance of creating visually stunning and user-friendly apps. Our designers and developers work hand-in-hand to deliver an exceptional user experience. ✅ Agile Approach: We embrace agile methodologies to ensure transparency and adaptability throughout the project. You'll have full visibility into the process, and we welcome your input at every stage. ✅ Stringent Testing: Quality assurance is at the core of our process. We conduct rigorous testing to eliminate bugs, glitches, and performance issues. ✅ Client Collaboration: We believe in the power of collaboration. Your insights and vision are invaluable, and we'll work closely with you to bring your app to life. Whether you need a single developer or an entire team, we provide flexible options to suit your business's specific requirements. Here's what our mobile team brings to the table: - Expertise in Flutter and Dart - Proficiency in iOS, Android, Swift, Objective-C, Java, and Kotlin - Versatility in client/server and database/web interfaces - UI/UX design capabilities - Familiarity with GraphQL - Database skills with Postgres - Experience with Docker, AWS, Hasura, and NodeJs Let's collaborate to create a digital solution that drives your business forward.
    Featured Skill Flutter
    Firebase
    AWS Application
    Docker
    iOS Development
    Android App Development
    Serverless Stack
    Team Management
    SQL
    Data Science
    Machine Learning
    Dart
    Git
    GraphQL
    Mobile App Development
  • $35 hourly
    • 5.0/5
    • (7 jobs)
    🚀 Senior Mobile Developer – Kotlin, Swift, Flutter | BLE, VPN, Firebase, AI I help startups and product teams build robust, scalable mobile apps – both native (Android & iOS) and cross-platform (Flutter/KMM). With 10+ years of experience, I’ve developed apps for: • VPN & privacy-focused products (custom traffic routing) • BLE integrations for health & fitness trackers • Real-time Firebase-powered chat and push systems • Daily tools like horoscopes, workout logs, and nutrition apps • AI-powered tools for image recognition and smart recommendations 🤖 AI & Mobile Agents: We also integrate AI agents and LLM-based assistants directly into mobile apps — from product scanners and chatbots to task-oriented mobile copilots powered by OpenAI, LangChain, or custom APIs. If you need on-device intelligence or connected AI workflows — we can deliver it. 🧱 Tech stack: • Kotlin, Jetpack Compose, BLE, VPNService, Firebase • Swift, SwiftUI, Apple HealthKit, Push Notifications • Flutter, REST APIs, KMM • OpenAI API, LangChain, serverless functions • Clean Architecture, modular MVVM, scalable code ✅ What I deliver: • Fast MVPs ready for App Store / Google Play • Pixel-perfect UI & responsive UX • Secure, maintainable code with real business value • Transparent, clear communication with timezone overlap (Europe-based) 💡 Open to mobile app builds, AI agent integration, feature modules, or long-term collaboration. — Android app developer, iOS developer, Kotlin, Swift, Jetpack Compose, SwiftUI, Flutter developer, BLE integration, VPN app, Firebase developer, cross-platform mobile, mobile AI integration, AI agent, OpenAI, LangChain, mobile chatbot, MVP mobile app, startup app, HealthKit, Firebase Firestore, FCM, mobile scanner, GPT integration
    Featured Skill Flutter
    iOS Development
    Android
    Mobile App Development
    React Native
    Swift
    iOS
    JSON
    Android SDK
    RESTful Architecture
    Android App Development
    Java
    Kotlin
    Firebase
  • $37 hourly
    • 4.8/5
    • (153 jobs)
    With over 12 years in the software development industry and more than 9 years of successful freelancing on Upwork, I bring a wealth of experience and expertise to every project. I specialize in mobile and web development, delivering high-quality, scalable solutions tailored to meet your specific needs. My extensive background includes working with cutting-edge technologies like Flutter, Riverpod and GetX, ensuring that I can handle even the most complex challenges. Whether you're looking to develop a robust mobile app, an interactive web application, or need expert guidance on your project, I'm here to help you achieve your goals with precision and efficiency. Let's bring your vision to life!
    Featured Skill Flutter
    ARCore
    Stripe
    FlutterFlow
    Augmented Reality
    Firebase Cloud Firestore
    Firebase
    Arch Linux
    Linux
    Apache Cordova
    Laravel
    Web Design
    Mobile App Design
    React
    CSS 3
  • $35 hourly
    • 5.0/5
    • (25 jobs)
    Experienced in cross-platform and native mobile app development, admin panels, dashboards, cloud, IoT solutions, web applications, and back-end (REST API, MQTT, etc) I am a Team Lead of the CitrusDev team, a Ukrainian software development company with over 40+ mobile and web developers, designers, project managers, DevOps, and QA specialists onboard. This means that besides my programming skills, you always have access to a full-stack product design & and development team. More about CitrusDev: CitrusDev provides customized software solutions for IoT startups, SaaS companies, eCommerce stores, LMS, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open-source technologies and platforms to bring innovation in an agile fashion. Our team excels in Java, Kotlin, Swift, Flutter, React Native, PHP, Laravel, WordPress, React.js, and Vue.js. With over 40+ people, CitrusDev has either empowered client teams or delivered end-to-end development projects for brands from the Internet of Things, consulting, eCommerce, marketing, or eLearning industries and is recognized as a Top IoT Developer in Ukraine by Clutch. Mykhailo, CitrusDev Team Keywords: iOS, Android, Flutter, BLE, Bluetooth, Core Bluetooth, Dart, Swift, Java, Kotlin, ESP32, IoT development, Internet of Things, embedded systems, IoT solutions, IoT firmware, IoT cloud, MQTT, WebRTC,, ESP32, Raspberry Pi, nRF, Nordic Semiconductors, NB-IoT, LPWAN, LoRaWAN, Zigbee, IoT architecture, IoT security, sensor integration, IoT protocols, real-time data processing, wireless communication, smart devices, cloud integration, AWS IoT, Azure IoT, Google Cloud IoT, ThingsBoard, Node-RED, Kaa IoT, OpenHAB, Home Assistant, industrial IoT, IoT automation, remote monitoring, IoT gateways, AIoT, machine learning for IoT, data analytics, smart home, smart city, smart farm, smart agriculture, agritech, healthcare, smart industry, smart logistics, IoT dashboards, IoT consulting, device-to-cloud, IoT scalability, low-power IoT, IoT connectivity, mobile app development, IoT mobile apps, cross-platform IoT apps, Flutter, native Android, native iOS, NFC, GPS tracking, telematics, wearable technology, connected devices, smart sensors, IoT-enabled automation, PCB development, hardware design, circuit design, custom IoT hardware, IoT prototyping, embedded hardware development, IoT manufacturing, cloud-based IoT platforms, real-time IoT analytics, IoT data visualization, edge AI, fog computing, MQTT brokers, CoAP, LwM2M, IoT fleet management, thermal printers, barcode scanners, RFID, heart rate monitors, ECG sensors, temperature sensors, humidity sensors, gas sensors, motion sensors, accelerometers, gyroscopes, pressure sensors, environmental monitoring, smart wearables, industrial sensors, medical IoT devices, IoT-based tracking solutions
    Featured Skill Flutter
    Payment Functionality
    CSS
    Tablet
    Raspberry Pi Firmware
    STM32
    Internet of Things Software
    Internet of Things
    MySQL
    Internet of Things Solutions Design
    Bluetooth
    WordPress
    Android
    iBeacon
    Laravel
    iOS
    Android App Development
    Vue.js
  • $32 hourly
    • 5.0/5
    • (61 jobs)
    ⭐️ Among the top 3% performers on Upwork (with a Bonus Package👇), 100+ satisfied clients, 14,500+ hours worked If you're looking for a team that ensures your product is built right the first time - on time and within budget - I’ve got you covered. [WORD-FOR-WORD FEEDBACK]: 🔶 “Andriy and his team deliver high-quality development with a customer-driven mindset. Their passion and responsiveness via Slack & Jira have been outstanding.” - Daniel Wiener, CEO, Autobound 🔶 “Andriy improved our system’s efficiency, reliability, and user interaction. His deep technical expertise and flexibility stood out.” - Alex Babich, CEO, Nuravine 🔶 “Softonix is a great development partner - highly skilled, communicative, and structured. Their two-week sprint approach kept everything on track.” - Chris McShane, CEO, Spencer 3D [WHAT I DO BEST] ❇️ MVP development that moves fast without sacrificing quality, AI automation, and scalable web & mobile solutions tailored to your business goals. ❇️ Technologies: - Vue.js (Nuxt.js) | React.js (Next.js) | Angular | TypeScript - Flutter (Dart, Bloc) - Unity (ARKit, Niantic Lightship) - Node.js (NestJS, ExpressJS, Koa) | .NET - PostgreSQL | GraphQL | MongoDB - Socket.IO, Twilio API - Responsive UI | Cross-browser compatibility - Git flow | CI-CD | Pipelines - Agile (Scrum, Kanban) using Jira/Asana/ClickUp ❇️ Clients: SMBs & Enterprises in Automotive, AI/ML Automation, Education, Logistics, and E-commerce. [BONUS PACKAGE]: As the Founder & CEO of Softonix, I’ve helped over 100 clients navigate complex tech challenges - balancing speed, scalability, and cost-effectiveness. Having a team of engineers behind me means clients get the best of both worlds - the flexibility of a freelancer with the reliability of a full-scale team when needed. Flexible engagement options based on your project needs: 🔹 Staff Augmentation – Need extra hands on your project? Get an experienced developer embedded into your existing team, ensuring a smooth workflow and increased development velocity. 🔹 Turnkey Project - Looking for a fully managed, end-to-end development solution? From architecture to deployment, let me handle everything - delivering a market-ready product with a structured, milestone-based approach. [WHAT SETS ME APART] ⚡ No one-size-fits-all solutions. Every product is unique, and so is the approach. Let me tailor your project for scalability, efficiency, and long-term success. ⚡ Value Upfront with Business Analysis. Before a single line of code is written, the best strategy, key workflows, and feature prioritization should be mapped out - ensuring a solid foundation for development. ⚡ End-to-End SDLC Expertise. From discovery to deployment, let me and my team cover all stages of the software development lifecycle (SDLC) - minimizing risks and maximizing efficiency. ⚡ Transparent & Agile. Expect weekly updates, iterative releases, and a results-driven approach - so you always know where your project stands. [WORKFLOW]: I always use a step-by-step approach - ensuring your product is built future-proof from day one: 1️⃣ Discovery Phase – Aligning business goals with the right tech stack & architecture before development starts. 2️⃣ Product Design & UI/UX – Creating Figma-driven, user-centric interfaces for an intuitive user experience. 3️⃣ Agile Development – Building scalable, high-performance web & mobile apps using Vue, React, Node/.NET, Flutter, Unity, and more. 5️⃣ QA & Performance Optimization – Ensuring stability, security, and peak performance through rigorous testing. 6️⃣ Cloud & DevOps – Leveraging AWS, GCP, Docker, Kubernetes, and serverless deployments for reliability and scalability. 7️⃣ Long-Term Support – Dedicated to complex, long-term projects, ensuring continuous growth and improvement. 8️⃣ Seamless Collaboration – Staying in sync 24/7 with real-time updates via Slack, Microsoft Teams, Jira, Asana, or ClickUp. Great products don’t build themselves (yet). Let’s make yours happen - drop me a message, and we’ll kick things off!
    Featured Skill Flutter
    Minimum Viable Product
    AI Platform
    TypeScript
    JavaScript
    Mobile App Development
    Full-Stack Development
    Angular
    .NET Core
    Next.js
    AR & VR
    Unity
    Node.js
    React
    Vue.js
  • $50 hourly
    • 5.0/5
    • (19 jobs)
    Full Stack Development Evangelist and CTO of JSDaddy.io - JSDaddy - web and multi-platform application development company. I have vast experience in development, work organization, communication, software design and deployment. I always stay tuned with the latest technologies and industry best practices and promote them in my company, and above all, strive for the best quality end efficiency of our solutions. Coach and Angular and Flutter Advocate.
    Featured Skill Flutter
    Next.js
    NestJS Development
    React
    Vue.js
    React Native
    QA Engineering
    NestJS
    PostgreSQL
    MongoDB
    Web Development
    Docker
    Angular
    Node.js
    TypeScript
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