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I am a mobile developer with over 9 years of experience in mobile development (Android and iOS) and 8 years specializing in Flutter. I have successfully completed over 40 projects across industries including e-commerce, real-time tracking, chat and social media, crypto wallets and exchanges, enterprise management, and food delivery platforms. Mobile Development Expertise I architect Flutter applications using advanced state management techniques including BLoC, Riverpod, Redux, Provider, Cubit, and MobX. I implement clean architecture patterns (MVVM, MVC) with repository pattern and dependency injection. I have built complex applications including ride-hailing platforms with real-time driver tracking, delivery management applications, location tracking systems with geofencing, social media platforms with live messaging, crypto wallet applications, and e-commerce platforms. My technical experience includes: - Native platform code (Kotlin/Swift) for method channels, background services on Android (Foreground Services, WorkManager, AlarmManager) and iOS (Background Modes, Background Fetch, Silent Push Notifications), background location tracking with geofencing - Advanced Flutter patterns including custom render objects, platform views, isolates for heavy computations, widget lifecycle optimization, and memory management - Real-time location tracking with polyline rendering, map clustering, driver availability management, live ETA calculations, and route optimization - Database architecture with Drift (Moor) for SQL and Hive for NoSQL, including indexing, query optimization, and migration management - Real-time systems using WebSockets, Server-Sent Events, GraphQL subscriptions, Socket io for chat, push notifications, and live data synchronization - Payment gateway integration (Stripe, PayPal) and in-app purchases with subscription management - Deep linking and app linking with dynamic routing and deferred deep linking for attribution - Flutter Web and Flutter Desktop with responsive design systems - Automated testing (unit, widget, integration), CI/CD pipelines with GitHub Actions and Codemagic - Performance optimization, debugging, profiling, widget rebuild optimization, and memory leak detection - Material Design, custom animations, hero animations, physics-based animations, and third-party package integration - Firebase (Firestore with security rules, Cloud Functions in TypeScript, Authentication with custom claims, Remote Config, Crashlytics, Hosting) I follow OOP principles, design patterns, and SOLID architecture to write clean, readable, and maintainable code. Other Experience Backend Development: Substantial experience building backend systems using NestJS and TypeScript. My work includes RESTful and GraphQL API design with versioning and rate limiting, database architecture (PostgreSQL, MongoDB) with schema design and query optimization, event-driven architecture using Redis pub/sub and Bull queues, security implementation (OAuth 2.0, JWT, encryption, OWASP compliance), server deployment using Docker, NGINX, and VPS optimization, and performance monitoring with Sentry. Blockchain & Smart Contract Development: I architect and deploy production smart contracts on multiple EVM chains with expertise in advanced Solidity patterns including Diamond Pattern (EIP-2535), Proxy Patterns (UUPS, Transparent, Beacon) for upgradeability, deployment on zkEVM chains (zkSync) and Optimistic Rollups (Base, Optimism, Arbitrum), ERC standards (ERC-20, ERC-721, ERC-1155), security best practices (reentrancy guards, access control, gas optimization), and Web3.js/Ethers.js integration for dApp connectivity and wallet integration (MetaMask, WalletConnect). Additional Skills: Prompt engineering with Claude, ChatGPT, and Gemini, workflow automation using n8n and Node.js, project management and technical leadership with code reviews and mentoring, client consultation and solution architecture, technical documentation, and Agile development with Git. I focus on delivering production-grade applications that are scalable, performant, and maintainable. I collaborate with stakeholders to understand business requirements and architect solutions that solve real problems while ensuring code quality and long-term maintainability.

Need a developer who can turn your idea into a production-ready mobile app? I’m Ahmed, a Top Rated React Native Developer with 5+ years of experience building mobile and web applications used by real users. I specialize in: 📱 React Native mobile apps (iOS & Android) 🌐 Next.js web applications 🤖 AI-powered products 👁️ Computer Vision & image analysis systems I’ve built e-commerce platforms, booking systems, real-time tracking applications, and AI-powered solutions. I also have hands-on experience with Computer Vision projects involving image analysis, measurements, and automated reporting. Clients hire me because I focus on building products that are scalable, maintainable, and ready for real-world use—not just demos. ⭐ Top Rated ⭐ 100% Job Success ⭐ Clear Communication & Reliable Delivery

I’m a Senior Mobile Engineer with 4+ years of experience building scalable, high-performance mobile applications using Flutter and Native Android (Java/Kotlin). My experience spans production-grade applications in healthcare, AI, e-commerce, transport, delivery, and enterprise solutions, working with international teams and companies across Germany, Saudi Arabia, the UAE, and the USA. I focus on writing clean, maintainable code and building mobile architectures designed for scalability, reliability, and long-term product growth. Beyond development, I value strong engineering practices, performance optimization, and effective collaboration across product, backend, and design teams. 🔹 Core Expertise • Flutter & Dart • Native Android Development (Java/Kotlin) • Mobile Architecture & Scalable Systems • Performance Optimization & Clean Code • Firebase, REST APIs & Third-Party Integrations • AI-powered mobile applications • App Store & Google Play deployment • Cross-functional team collaboration 🔹 Highlights ✅ Top Rated Plus Freelancer on Upwork ✅ 25+ successful mobile projects delivered ✅ Experience with large-scale production applications ✅ Long-term collaborations with international teams ✅ Strong communication and ownership mindset I enjoy solving complex engineering challenges and building mobile products that combine performance, scalability, and excellent user experience.

Embedded Systems | Embedded Linux & Android Systems Engineer | Linux · Yocto · Qt/QML · AOSP · Android Automotive · Android Development · ADB Automation · C/C++ · Python · Java · Kotlin If you're building a product that runs Linux or Android under the hood - from an embedded device to an infotainment system - and you need someone who understands every layer from the hardware up, I can help you ship it. I specialize in the space most engineers avoid: the gap between hardware and the software stack. That means I can trace a boot failure to a kernel driver, customize an AOSP build from scratch, fix a VHAL service that drops vehicle signals, or write Python tooling that replaces hours of manual ADB work across a fleet of devices. What I work on: - Embedded Linux - Yocto, BSP bring-up, driver development, cross-compilation - AOSP builds and system-level customization (permissions, overlays, HALs, system services) - Android Automotive OS - VHAL, AIDL interfaces, CarService integration - Python ADB automation - multi-device control, test frameworks, CI scripting - Android app development in Kotlin/Java when the project needs it - Boot, performance, and crash debugging across hardware and software layers - Docker environments for reproducible builds and clean dev workflows Why this matters for your project: Most engineers are strong at one layer - app, firmware, or Linux. I work across all of them. That means I catch integration bugs that fall between teams, and I can translate clearly between hardware and software sides so nothing gets lost. Recent work includes Android Automotive infotainment systems, AOSP-based product customization, and Python automation tools for multi-device QA workflows. If you're dealing with a system-level issue, need an embedded Linux or Android build customized, or want automation that actually works at scale - let's talk.

Introduction: I am a freelance Data Scientist with a passion for leveraging data-driven solutions to tackle real-world challenges. With a strong background in artificial intelligence and a commitment to delivering high-quality work. Freelance Career: Driven by a desire for independence and the opportunity to work on diverse projects, I embarked on a freelance career in data science and machine learning. As a freelancer, I have collaborated with clients across various platforms, to develop custom machine learning solutions tailored to their specific needs.