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🏆 Upwork Top Rated Plus – Senior Flutter Developer | Technical Product Partner I'm Moetez, a senior Flutter developer with 7+ years of hands-on experience building high-performance, scalable mobile apps. But I bring more than just code — I help founders and teams shape solid product foundations, make smart technical decisions, and deliver apps that are built to succeed in the real world. I specialize in building apps from the ground up — clean, maintainable, and scalable. Whether you're starting with a raw idea or improving an existing product, I bring a strategic mindset, technical depth, and a focus on long-term growth. 🚫 I’m not the kind of developer who rushes through work or cuts corners. I believe in doing things right from the start — building clean, maintainable codebases and scalable architectures that set the stage for long-term success. The products I deliver aren’t just functional — they’re reliable, ready to grow, and built with the end user in mind. 💡 Core values I bring to every project: • Quality over shortcuts – I never compromise on the architecture or long-term maintainability of the code • Scalability by design – I lay solid foundations that support future features, growth, and performance • Clear communication – You’ll always know where things stand, with updates that are on time and easy to understand • Ownership mindset – I treat your project like it’s my own, with care, precision, and pride in the final product • User-first thinking – I build experiences that users love — not just code that runs 💬 If you have a project idea or challenge you’re facing, feel free to reach out — I’m here to help turn it into something powerful. 🚀 Let’s build something that lasts.

Hi, I’m Nesrine, a Flutter developer focused on fixing, improving, and publishing mobile apps for Android and iOS. I help clients with: • Fixing bugs and crashes • Improving UI and layout issues • Adding new features • API integration (REST, Firebase) • Performance optimization • Google Play & App Store publishing I’ve worked on multiple production apps and understand how important stability, responsiveness, and clean code are for mobile projects. I communicate clearly, respond quickly, and stay fully dedicated until the task is completed properly. If your Flutter app needs fixes, improvements, or help getting published, I’m ready to start immediately.

— AI-powered mobile apps (Flutter + OpenAI / Claude / Gemini) Chat assistants, AI coaching apps, LLM-integrated workflows, real-time AI features inside existing apps — Enterprise XR & Unity simulations Training simulations, serious games, AR/VR prototypes for industrial and medical clients, Photon multiplayer, cross-platform deployment — Flutter apps from MVP to App Store Full-cycle development: architecture, Firebase backend, payment integration, App Store + Play Store submission Why clients work with me: → I've maintained a $10K+ long-term engagement for a single client — I'm not a one-project developer → Production-ready code with clean architecture, not copy-paste tutorials → I flag problems before they become blockers, not after → Fast response, honest timelines, zero scope surprises Tech stack: Flutter · Dart · Unity · C# · Firebase · Node.js · OpenAI API · Claude API · Gemini · REST APIs · Photon · AR Foundation · XR Toolkit · .NET · Angular · React · Figma Flutter developer | Flutter app developer | AI mobile app developer | AI app development | Flutter Firebase | Flutter OpenAI integration | Flutter Claude AI | Flutter Gemini | Unity developer | Unity XR developer | Unity AR developer | Enterprise XR simulation | Unity training simulation | Serious game developer | Flutter iOS Android | Mobile app developer | Flutter MVP developer | LLM integration developer | AI chatbot mobile app | Flutter Node.js | Flutter full stack | Unity C# developer | Photon Unity multiplayer | Flutter in-app purchases | App Store submission Flutter | Flutter bug fix | Unity bug fix | Flutter web app | Flutter desktop | AR Foundation Unity | XR Toolkit Unity | Firebase Flutter | Flutter REST API | AI agent mobile app | Flutter Riverpod | Flutter BLoC | Flutter clean architecture

Flutter Engineer | Mobile App Expert Hi, I’m Hamed , a passionate Flutter developer with over five years of experience building high‑performance mobile applications for iOS and Android. I’ve partnered with major companies to deliver flagship apps that have surpassed 50,000 downloads, and helped early‑stage startups raise over $120K in funding. What I Offer: ✔️ Flutter App Development (Android & iOS) ✔️ Custom UI/UX Design for smooth user experiences ✔️ State Management (Provider, Riverpod, Bloc, GetX) ✔️ API Integration (REST, Firebase, GraphQL) ✔️ Map Integration (Google Maps, Mapbox, OpenStreetMap) ✔️ AI Chatbot Integration (OpenAI, ChatGPT API, DeepSeek) ✔️ Performance Optimization & Bug Fixing ✔️ Third-Party SDKs & Payment Gateways (Stripe, PayPal, Firebase, etc.) ✔️ Play Store & App Store Deployment Clear Communication & Reliability I believe in transparent communication, timely updates, and meeting deadlines to ensure a successful project. I will work closely with you to understand your requirements and deliver a top-notch mobile app tailored to your business needs. Let’s Build Your Next App! If you're looking for a professional Flutter expert who can bring your ideas to life, let’s connect and start building your app today!

Startups and enterprises hire me when they need an AI-powered mobile app or immersive XR simulation built to production standard — not a prototype that falls apart after launch. I've delivered Flutter apps with LLM integration, Unity enterprise simulations, and mobile products currently serving real users across multiple markets. What I build: — AI-powered mobile apps (Flutter + OpenAI / Claude / Gemini) Chat assistants, AI coaching apps, LLM-integrated workflows, real-time AI features inside existing apps — Enterprise XR & Unity simulations Training simulations, serious games, AR/VR prototypes for industrial and medical clients, Photon multiplayer, cross-platform deployment — Flutter apps from MVP to App Store Full-cycle development: architecture, Firebase backend, payment integration, App Store + Play Store submission Why clients work with me: → I've maintained a $10K+ long-term engagement for a single client — I'm not a one-project developer → Production-ready code with clean architecture, not copy-paste tutorials → I flag problems before they become blockers, not after → Fast response, honest timelines, zero scope surprises Tech stack: Flutter · Dart · Unity · C# · Firebase · Node.js · OpenAI API · Claude API · Gemini · REST APIs · Photon · AR Foundation · XR Toolkit · .NET · Angular · React · Figma Flutter developer | Flutter app developer | AI mobile app developer | AI app development | Flutter Firebase | Flutter OpenAI integration | Flutter Claude AI | Flutter Gemini | Unity developer | Unity XR developer | Unity AR developer | Enterprise XR simulation | Unity training simulation | Serious game developer | Flutter iOS Android | Mobile app developer | Flutter MVP developer | LLM integration developer | AI chatbot mobile app | Flutter Node.js | Flutter full stack | Unity C# developer | Photon Unity multiplayer | Flutter in-app purchases | App Store submission Flutter | Flutter bug fix | Unity bug fix | Flutter web app | Flutter desktop | AR Foundation Unity | XR Toolkit Unity | Firebase Flutter | Flutter REST API | AI agent mobile app | Flutter Riverpod | Flutter BLoC | Flutter clean architecture

👉𝐌𝐨𝐬𝐭 𝐚𝐩𝐩𝐬 𝐟𝐚𝐢𝐥 𝐧𝐨𝐭 𝐛𝐞𝐜𝐚𝐮𝐬𝐞 𝐨𝐟 𝐛𝐚𝐝 𝐢𝐝𝐞𝐚𝐬 𝐛𝐮𝐭 𝐛𝐞𝐜𝐚𝐮𝐬𝐞 𝐭𝐡𝐞𝐲’𝐫𝐞 𝐩𝐨𝐨𝐫𝐥𝐲 𝐛𝐮𝐢𝐥𝐭, 𝐡𝐚𝐫𝐝 𝐭𝐨 𝐬𝐜𝐚𝐥𝐞, 𝐨𝐫 𝐝𝐢𝐬𝐜𝐨𝐧𝐧𝐞𝐜𝐭𝐞𝐝 𝐟𝐫𝐨𝐦 𝐫𝐞𝐚𝐥 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐧𝐞𝐞𝐝𝐬. 𝐈 𝐡𝐞𝐥𝐩 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬𝐞𝐬 𝐚𝐯𝐨𝐢𝐝 𝐭𝐡𝐚𝐭. Hi, I’m Seifeddine el Behi, a Senior Flutter Engineer & Mobile Full-Stack Developer with 5+ years of experience building production-ready apps that scale and last. I specialize in Flutter + Node.js, delivering complete mobile products from architecture and UI decisions to backend APIs and long-term maintenance. I don’t just ship features; I build stable, scalable products that stay in production. 𝐖𝐡𝐚𝐭 𝐈 𝐛𝐫𝐢𝐧𝐠 𝐭𝐨 𝐭𝐡𝐞 𝐭𝐚𝐛𝐥𝐞: 📱 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: iOS, Android, Web & Desktop (clean architecture, scalable state management) 🔗𝐌𝐨𝐛𝐢𝐥𝐞 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤: Flutter + Node.js (REST APIs, auth, payments, dashboards) 🧠 𝐏𝐫𝐨𝐝𝐮𝐜𝐭-𝐅𝐨𝐜𝐮𝐬𝐞𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: technical decisions aligned with business goals 🎨 𝐔𝐈/𝐔𝐗 𝐰𝐢𝐭𝐡 𝐅𝐢𝐠𝐦𝐚: when needed, to ensure usability and consistency 𝐏𝐫𝐨𝐯𝐞𝐧 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞: ✅ 𝟖+ 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 🇩🇪 𝐖𝐨𝐫𝐤𝐞𝐝 𝐰𝐢𝐭𝐡 𝐆𝐞𝐫𝐦𝐚𝐧 𝐚𝐧𝐝 𝐨𝐭𝐡𝐞𝐫 𝐜𝐨𝐦𝐩𝐚𝐧𝐢𝐞𝐬 𝐚𝐧𝐝 𝐬𝐭𝐚𝐫𝐭𝐮𝐩𝐬 🚀 𝐀𝐩𝐩𝐬 𝐬𝐭𝐢𝐥𝐥 𝐥𝐢𝐯𝐞 𝐚𝐧𝐝 𝐚𝐜𝐭𝐢𝐯𝐞𝐥𝐲 𝐦𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐞𝐝 𝐢𝐧 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 🤝 𝐒𝐭𝐫𝐨𝐧𝐠 𝐛𝐚𝐜𝐤𝐠𝐫𝐨𝐮𝐧𝐝 𝐢𝐧 𝐥𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 𝐜𝐨𝐧𝐭𝐫𝐚𝐜𝐭𝐬 𝐚𝐧𝐝 𝐨𝐰𝐧𝐞𝐫𝐬𝐡𝐢𝐩-𝐝𝐫𝐢𝐯𝐞𝐧 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧 I’ve built apps across eCommerce, events, fashion, insurance, education, food, and industrial platforms, and I currently run my own consulting company working on multiple products. 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞: • 𝐂𝐥𝐞𝐚𝐫 𝐜𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 & 𝐫𝐞𝐚𝐥𝐢𝐬𝐭𝐢𝐜 𝐭𝐢𝐦𝐞𝐥𝐢𝐧𝐞𝐬 • 𝐒𝐞𝐧𝐢𝐨𝐫-𝐥𝐞𝐯𝐞𝐥 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐨𝐰𝐧𝐞𝐫𝐬𝐡𝐢𝐩 • 𝐂𝐥𝐞𝐚𝐧, 𝐦𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐚𝐛𝐥𝐞, 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐜𝐨𝐝𝐞 • 𝐋𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 𝐦𝐢𝐧𝐝𝐬𝐞𝐭 (𝐧𝐨𝐭 “𝐝𝐞𝐥𝐢𝐯𝐞𝐫 𝐚𝐧𝐝 𝐝𝐢𝐬𝐚𝐩𝐩𝐞𝐚𝐫”) If you’re looking for a senior Flutter expert who thinks like a product engineer, not just a coder, let’s talk. 👉 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐚𝐧𝐝 𝐥𝐞𝐭’𝐬 𝐬𝐞𝐞 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐬𝐮𝐜𝐜𝐞𝐞𝐝.