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I’m Hamza a Biomedical Engineer with a passion for Embedded Systems, IoT, Electronics, and Robotics. I turn ideas into real, working prototypes and products. Whether it’s designing smart devices, building automation systems, or creating medical technology, I bring innovation to life. What I Do Best: Embedded Systems & IoT Experience with ESP32, NRF52, ATMEL, STM32, PSOC, PIC Work with Raspberry Pi, VisionFive (Linux Board), and Unihiker Programming Proficient in C/C++, Python, Java, MATLAB, JavaScript, and Flutter Connectivity & Communication Skilled in UART, I2C, SPI, MQTT, BLE, BLE Mesh, Sigfox, and Wi-Fi Hardware Design & Prototyping Specialize in PCB Design, 3D Modeling, and Product Prototyping GUI Development Develop Touchscreen Interfaces, E-Paper & TFT Displays, Web Dashboards, and Desktop Applications Work with LVGL, Tkinter, PyQt, and Kivy Framework IoT & Cloud Integration Experienced with AWS IoT, Firebase, ThingsBoard, and WebSocket-based real-time control Industrial IoT (IIoT) Expertise in CAN Communication, Factory Automation, and Smart Sensor Networks Remote Monitoring & OTA Updates Work with ESP-IDF OTA, BLE DFU, and Cloud-Based Device Management I’ve built industrial prototypes, smart sensors, automation systems, and medical devices, real-time data processing and device connectivity. If you need a reliable, high-quality solution, let’s make it happen! Let’s Collaborate!

I'm a Senior Mobile App Developer with 7+ years of experience building production-ready iOS, Android, and Apple Watch apps — from idea to App Store launch. I work with startups and businesses to turn ideas into high-quality mobile apps and games. I've developed and published multiple apps and games on Google Play and the App Store across utility, fitness, productivity, shooter, puzzle, and idle categories. 🚀 What I Can Help You With - 📱 iOS & Android mobile apps (React Native, Flutter, Swift) - 🎨 No-code apps with FlutterFlow - ⌚ Apple Watch apps (watchOS, SwiftUI) - 🎮 Unity 2D/3D mobile games (casual, shooter, idle, simulation) - 🖌️ Clean UI/UX with responsive layouts - 🔥 Firebase (Auth, Database, Analytics, Remote Config) - 💰 Ad & monetization integration (AdMob, Unity Ads) - ⚡ Performance optimization & bug fixing - 🚢 Feature development, polishing & store deployment ✅ Why Clients Choose Me - 💬 Clear communication and reliable updates - 🧹 Clean, maintainable, and scalable code - 🏎️ Strong focus on performance and stability - 🔄 Full cycle delivery — from idea to store release - 🎯 Practical, results-driven approach Whether you need a mobile app, Apple Watch experience, a Unity game, or a FlutterFlow solution, I deliver products that are ready for real users — not just code. My published work includes Cabi, The Source, ReelNZ, Workout Timer, and more — all live on Google Play and the App Store.

Many apps look finished, but fail when real users start using them. I help startups and businesses build, fix, optimize and launch stable iOS and Android apps using React Native, Expo and AI-powered integrations. ⭐ Top Rated Mobile App Developer with 100% Job Success Score and 5-star client reviews. I handle the full product lifecycle from frontend development and backend APIs to database setup, payments, AI features, push notifications, Google Maps, testing, deployment, App Store submission and Google Play release. Core Services: • React Native and Expo app development • iOS and Android app development • Cross-platform MVP and production app development • Existing app bug fixing, refactoring and optimization • App Store and Google Play submission support • Rejected app fixes, build errors, certificates and release issues • Node.js backend development • Supabase, Firebase, PostgreSQL, REST APIs, GraphQL and webhooks • Stripe, Stripe Connect, in-app purchases, PayPal and RevenueCat integration • OpenAI, ChatGPT, Claude and AI API integration • AI chatbots, AI assistants and AI-powered mobile workflows • Push notifications, chat, GPS tracking, Google Maps, WebSockets and real-time features Web & Full-Stack Support: I also build React, Next.js, Node.js, dashboards, admin panels, landing pages, SaaS portals, APIs and backend systems connected to mobile apps. Industries: E-commerce • Social commerce • B2B platforms • On-demand services • Booking platforms • Dating apps • Social video • AI apps • SaaS • Startup MVPs • Marketplaces Technical Stack: React Native • Expo • TypeScript • JavaScript • iOS • Android • Node.js • React • Next.js • Supabase • Firebase • PostgreSQL • Redux • Stripe • RevenueCat • OpenAI • ChatGPT • Claude • Google Maps • WebSockets • REST APIs • GraphQL • AWS • Docker • CI/CD Available 30+ hours/week. 4-hour response time. Send me your app idea, Figma design, AI feature, existing codebase, rejected app or launch issue and I will respond with a clear plan.

I'm a Mobile App Developer with 8 years building Flutter apps for iOS and Android, specializing in backend integration, device connectivity, and real-time data sync. I started as a native Android developer and moved into Flutter as it matured, so I bring both deep native platform knowledge and modern cross-platform speed to every project. I've built and led development on apps across e-commerce, property management, parking and IoT, and compliance technology, including a connected app for supervised-release monitoring (device pairing, live location tracking, automated check-ins) and a property management platform with real-time listings and a cloud backend. What I can help you with: 1. MVP development for startups: from design files to a published, working app 2. Bluetooth and IoT integration: device pairing, real-time data sync, hardware-to-app communication 3. Authentication, cloud database, push notifications, and analytics setup 4. REST API and WebSocket backend integration 5. Payment gateway integration and in-app purchases 6. Offline-first apps with local storage and sync 7. Bug fixing, performance optimization, and codebase refactoring 8. App publishing and release management Technical skills: Flutter, Dart, Kotlin, Swift, Java, state management (BLoC, Provider, Riverpod, GetX), cloud backend services, maps and location services, local databases, and version control. Why clients work with me: Top Rated Plus freelancer on Upwork with a consistent delivery track record Named Best Android Developer of the Year at a previous company Experience leading development teams, not just writing code solo Clear, consistent communication and realistic timelines Ongoing post-launch support when needed If you need a mobile app developer who can take ownership of your project end-to-end, from architecture to launch, I'd be glad to discuss what you're building.

🚀 𝐓𝐡𝐞 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐢𝐬 𝐜𝐫𝐨𝐰𝐝𝐞𝐝, 𝐚𝐧𝐝 𝐚𝐯𝐞𝐫𝐚𝐠𝐞 𝐝𝐞𝐬𝐢𝐠𝐧 𝐣𝐮𝐬𝐭 𝐝𝐨𝐞𝐬𝐧’𝐭 𝐜𝐮𝐭 𝐢𝐭 𝐚𝐧𝐲𝐦𝐨𝐫𝐞. Whether it’s a mobile app, a macOS desktop tool, or a UI that converts users demand performance, beauty, and seamless experience. That’s where I come in. I'm a 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐦𝐚𝐜𝐎𝐒 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 + 𝐔𝐈/𝐔𝐗 𝐃𝐞𝐬𝐢𝐠𝐧𝐞𝐫 with a proven record of building high-performance apps and clean, conversion-driven designs. I specialize in delivering Swift-powered solutions that combine sleek front-ends with rock-solid back-end logic. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: ✔ iOS Development (Swift, SwiftUI, Combine, CoreData) ✔ macOS Desktop App Development using native frameworks & APIs ✔ MVVM Architecture for scalable, clean codebases ✔ Firebase Integration (Realtime DB, Auth, Cloud Messaging, Firestore) ✔ Custom PDF Workflows with PDFKit ✔ Smooth Lottie Animations for next-level UI ✔ API Integration + JSON Serialization with precision ✔ UI/UX Design in Figma – From wireframe to final screen ✔ Responsive Design for all screen sizes (Mobile + Desktop) ✔ Landing Pages & Web UI that convert visitors into users 💡 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞: ✔ 6+ years of experience across mobile, desktop & UI design ✔ Cross-disciplinary skills I don’t just code, I design with purpose ✔ Clean, modular code that’s easy to scale and maintain ✔ Great communication, deadline-oriented, and focused on ROI ✔ Solutions built around real user behavior not just trends 🏆 𝐑𝐞𝐜𝐞𝐧𝐭 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬: 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟏 – 𝐒𝐰𝐢𝐟𝐭𝐔𝐈 + 𝐏𝐃𝐅𝐊𝐢𝐭 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 𝐒𝐲𝐧𝐜 Developed a cross-platform app (iOS + macOS) using SwiftUI and PDFKit, integrated with Firebase for real-time data sync and custom PDF export workflows. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟐 – 𝐦𝐚𝐜𝐎𝐒 𝐃𝐞𝐬𝐤𝐭𝐨𝐩 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐂𝐨𝐫𝐞𝐃𝐚𝐭𝐚 + 𝐂𝐨𝐦𝐛𝐢𝐧𝐞 Delivered a clean, MVVM-structured desktop app using CoreData and Combine for smooth UI updates and persistent storage. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟑 – 𝐀𝐏𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐋𝐨𝐭𝐭𝐢𝐞 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 Built a visually rich app featuring Lottie animations and seamless third-party API integration for enhanced interactivity. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟒 – 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐒𝐡𝐨𝐩𝐩𝐢𝐧𝐠 𝐀𝐩𝐩 𝐔𝐈 𝐢𝐧 𝐅𝐢𝐠𝐦𝐚 Designed a mobile shopping app UI in Figma with responsive layouts, optimized for usability across iPhone and iPad screens. You can explore these live projects in my portfolio for real examples of my code, design, and delivery standards. 👥 𝐖𝐡𝐨 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡: Startups & Entrepreneurs launching new mobile or macOS apps Agencies who need reliable developers/designers for client work Businesses looking to redesign or optimize mobile/Desktop UI/UX Tech teams who need clean architecture, API handling, and modern Swift coding 🎯 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐓𝐨𝐨𝐥𝐬: Languages/Frameworks: Swift, SwiftUI, Combine, Firebase, MVVM, CoreData Design: Figma, Lottie, Responsive Design Tools: PDFKit, REST APIs, JSON serialization, Git You’ve got a product that deserves to perform and look outstanding let’s make sure your users love every tap, swipe, and click. Click “Invite” and let’s build something that scales, converts, and stands out.

I'm Abdul Rafeh — a passionate developer with over 5 years of experience building fast, scalable, and user-friendly web and mobile applications. I work with React Native, React.js, and Next.js to craft smooth, responsive frontends, and I love bringing ideas to life across iOS, Android, and the web. I also work extensively on the backend, using NestJS and Node.js to build clean, modular APIs that scale well and keep things running smoothly behind the scenes. Over the years, I’ve had the chance to dive into some exciting areas like blockchain and Web3, integrating tools like Ethers.js, Wagmi, and RainbowKit. More recently, I’ve been working with AI agents like OpenAI and Claude, using LLMs to build smarter, more interactive user experiences. Whether it's creating full-stack applications, integrating payment systems, or building chatbots and decentralized apps, I love solving real problems with code. Tech I work with: React Native • React.js • Next.js • Node.js • NestJS • Express • Firebase • PostgreSQL • MongoDB • Supabase • Zustand • Redux Toolkit • Tailwind CSS • GraphQL • Wagmi • Ethers.js • RainbowKit • Solana • AWS • PWA • OpenAI • Claude • Whisper • Deepgram • Stability AI • TensorFlow.js • RevenueCat • Mixpanel • HubSpot • Stripe • Expo • WalletConnect