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Senior Mobile & Flutter Developer (Short-Term & MVP Projects) I’m a senior mobile developer experienced in building and upgrading apps for startups, businesses, and product owners. Whether you need to launch a new Flutter app from scratch, build a fast MVP, integrate AI capabilities, or fix performance bottlenecks in your current app, I can help. Core Stack: Flutter & Dart, Kotlin Multiplatform (KMP), Native Android/iOS, and RESTful APIs. What I Do: End-to-end app development, AI API integrations, performance optimization, and App Store / Google Play publishing. Full Ownership: From initial architectural setup to final store submission, I handle the technical execution from start to finish. Clear Communication: Regular updates, clear milestones, and proactive problem-solving are my top priorities, so you’re never left in the dark. Have a project or a fast feature you need built? Let’s connect and get it done!

Top Rated Flutter developer. 8+ years in software, 7+ in mobile, 5+ in Flutter. I own the iOS/Android lane end-to-end: architecture, features, store release, and the crash/performance work after launch. 📦 Shipped (production): • Savvi — AI productivity app with RevenueCat paywall and Firebase crash monitoring • Foreverly — AI couple space with subscriptions and push • Voice Nudge — audio/habit app (RevenueCat + OneSignal) • Friendkeez — vacation-home community on mobile + Flutter web (Stripe, realtime, maps) • Bonpéi — customer + merchant marketplace apps (maps, device auth) • SpinKube — puzzle game with Firebase + ads 🎯 What clients hire me for: • Build a Flutter MVP or production app from Figma → App Store / Play Store • Take over an existing Flutter codebase (architecture, performance, Crashlytics) • Add payments, auth, chat, maps, or AI features without rewriting the app • Flutter web when the product needs one codebase for mobile + web 🛠 Stack I actually ship with: • Flutter / Dart, Clean Architecture (Bloc or Provider, Dio + Retrofit, go_router / auto_route) • Firebase: Auth, Firestore, Storage, Crashlytics, Messaging, Remote Config, Cloud Functions • RevenueCat subscriptions and Stripe checkout (mobile + Flutter web) • Realtime: Socket, Firestore, OneSignal / FCM • Maps & location: Google Maps, geolocation, background tracking when the product needs it • AI product features wired through backend / Cloud Functions (chat, content, couple/productivity apps) 💬 How I work: Clear updates, realistic estimates, ownership of delivery. I write code the next developer can maintain — including multi-flavor builds and TestFlight / Play rollout. Send the brief. I'll reply with a short plan, timeline, and what I would build first. Flutter · Dart · Firebase · Bloc · Clean Architecture · RevenueCat · Stripe · iOS · Android · Flutter Web · Google Maps · OneSignal

AI can generate code. We handle the problems that require engineering judgment. I’m Tuan, a Senior Product Engineer leading a team focused on complex web and mobile products, projects where standard development, templates, or AI-generated code alone are not enough. We’re usually brought in when a product involves difficult architecture, complex business logic, third-party integrations, real-time systems, native mobile functionality, scalability, performance issues, or an existing codebase that needs serious technical work. Our experience includes Next.js, React Native, Node.js, Supabase, AI agents, payment systems, subscriptions, real-time communication, native SDKs, and complex API integrations. We use AI heavily in our development workflow. But AI is a tool, not the engineer. Architecture decisions, debugging production issues, understanding edge cases, managing technical trade-offs, and turning complicated requirements into reliable software still require experienced people. If your project is straightforward CRUD, there are thousands of developers who can build it. If it’s technically difficult, already stuck, difficult to scale, or requires someone to understand the whole product instead of simply completing tickets — that’s where we can help. Let’s connect. Send me your requirements, Figma, architecture, or existing codebase. I’ll review it and tell you how we would approach the difficult parts before we start.

📱 Mobile Developer(Flutter/iOS) | Building Mobile Solutions That Scale ⭐⭐⭐⭐⭐ Whether you're a startup founder launching your first app, a business owner scaling your mobile presence, or a team building the next big platform, I bring the technical expertise to transform your vision into a high-performance, user-loved mobile application ready for the App Store. With over 10 years of hands-on Mobile development, I've delivered 20+ successful projects that don't just work—they drive real business results. I combine deep technical knowledge with exceptional communication skills, ensuring seamless collaboration from concept to launch. I'm committed to solving your toughest mobile challenges efficiently in these areas: 📱 𝐂𝐎𝐑𝐄 𝐅𝐋𝐔𝐓𝐓𝐄𝐑 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄 • Flutter 3.x & Dart • Objective-C, Swift, SwiftUI • Cross-platform iOS & Android development • Responsive web applications • Material Design & Cupertino widgets • Custom UI/UX implementation • Pixel-perfect designs 🏗️ 𝐒𝐓𝐀𝐓𝐄 𝐌𝐀𝐍𝐀𝐆𝐄𝐌𝐄𝐍𝐓 & 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄 • BLoC Pattern • Provider • Riverpod • GetX • Clean Architecture • MVVM • Repository Pattern • Scalable app structure for long-term maintainability 🔗 𝐁𝐀𝐂𝐊𝐄𝐍𝐃 & 𝐈𝐍𝐓𝐄𝐆𝐑𝐀𝐓𝐈𝐎𝐍 • Firebase (Auth, Firestore, Cloud Functions, FCM, Analytics) • REST APIs • GraphQL • WebSocket for real-time features • Third-party SDK integration • API design & implementation 💳 𝐏𝐀𝐘𝐌𝐄𝐍𝐓 & 𝐌𝐎𝐍𝐄𝐓𝐈𝐙𝐀𝐓𝐈𝐎𝐍 • Stripe • PayPal • In-App Purchases (iOS & Android) • Subscription models • Payment gateway integration • Secure transaction handling ⚡ 𝐏𝐄𝐑𝐅𝐎𝐑𝐌𝐀𝐍𝐂𝐄 𝐎𝐏𝐓𝐈𝐌𝐈𝐙𝐀𝐓𝐈𝐎𝐍 • App performance profiling & optimization • Memory management • Lazy loading & caching strategies • Reducing app size • Smooth 60fps animations • Offline-first architecture with local storage 💾 𝐃𝐀𝐓𝐀𝐁𝐀𝐒𝐄 & 𝐒𝐓𝐎𝐑𝐀𝐆𝐄 • SQLite • Hive • Drift (Moor) • SharedPreferences • Secure storage • Cloud Firestore • Realm • Data encryption & security best practices 🔔 𝐑𝐄𝐀𝐋-𝐓𝐈𝐌𝐄 𝐅𝐄𝐀𝐓𝐔𝐑𝐄𝐒 • Push notifications (FCM, OneSignal) • Live chat & messaging • Real-time data sync • WebSocket connections • Socket.io integration 🧪 𝐓𝐄𝐒𝐓𝐈𝐍𝐆 & 𝐐𝐔𝐀𝐋𝐈𝐓𝐘 𝐀𝐒𝐒𝐔𝐑𝐀𝐍𝐂𝐄 • Unit testing • Widget testing • Integration testing • Automated testing with CI/CD • Code coverage • Comprehensive testing before deployment 🚀 𝐃𝐄𝐏𝐋𝐎𝐘𝐌𝐄𝐍𝐓 & 𝐃𝐄𝐕𝐎𝐏𝐒 • App Store & Play Store submission • TestFlight & Firebase App Distribution • CI/CD with GitHub Actions, Codemagic, Bitrise • Version management • Beta testing coordination 🎯 𝐈𝐍𝐃𝐔𝐒𝐓𝐑𝐘 𝐄𝐗𝐏𝐄𝐑𝐈𝐄𝐍𝐂𝐄 Successfully delivered apps across: • E-commerce & Retail • Fintech & Banking • Healthcare & Telemedicine • Food Delivery • Social Networking • On-Demand Services • Enterprise Solutions • Educational Platforms 💼 𝐏𝐑𝐎𝐕𝐄𝐍 𝐑𝐄𝐒𝐔𝐋𝐓𝐒 • 98% client satisfaction with zero missed deadlines • Apps generating $2M+ combined revenue for clients • 40-60% cost savings through efficient cross-platform development • Average 4.8+ app store ratings on delivered projects • 15+ successful projects across iOS and Android 🤝 𝐌𝐘 𝐀𝐏𝐏𝐑𝐎𝐀𝐂𝐇 I don't just code I collaborate. From initial concept to App Store launch, I work closely with clients to ensure their vision becomes a polished, scalable product. Clean code, thorough testing, and clear communication are non-negotiable in my process. I bring not only technical depth but also Agile methodology expertise, delivering projects on time while maintaining the highest quality standards. 📌 Available for hourly, fixed-rate, and ongoing B2B, B2C, and SaaS engagements. 🎯 Ready to transform your app idea into a profitable reality today. 🌍 Countries Collaborated With: 🇺🇸 United States | 🇨🇦 Canada | 🇬🇧 United Kingdom | 🇦🇪 United Arab Emirates | 🇩🇪 Germany | 🇫🇷 France | 🇦🇺 Australia | 🇸🇬 Singapore | 🇻🇳 Vietnam...