Hire the Best Flutter Developers
in Vietnam

I have 8 years of experience as a skilled Android and Flutter developer. My passion lies in creating visually appealing and intuitive mobile applications with the Flutter framework. I am well-versed in Flutter's architecture and ecosystem, which enables me to deliver high-quality and robust applications that meet clients' requirements. Here are some of my skills: 👉 Flutter: Extensive experience in developing cross-platform mobile applications using the Flutter framework. Proficient in building interactive UIs, implementing complex animations, and managing state within Flutter applications. 👉 GraphQL: Hands-on experience in building GraphQL APIs and integrating them into Flutter applications. Can design and implement GraphQL schemas, resolve queries and mutations, and establish real-time communication using GraphQL subscriptions. 👉 Socket Programming: Expertise in socket programming and developing real-time applications using libraries such as Socket.io and WebSockets. Capable of implementing bidirectional communication channels, handling event-based messaging, and ensuring data synchronization between clients and servers. 👉 NFC (Near Field Communication): Worked with NFC technology to enable communication between devices and NFC-enabled tags or cards. Developed applications that read and write NFC tags, handled NFC transactions, and integrated NFC functionality into Flutter applications. 👉 Restful APIs: Strong understanding of RESTful API principles and experience in implementing APIs using frameworks such as Express.js and Django. Can design API endpoints, handle authentication and authorization, and process data in JSON format. 👉 Git: Proficient in version control using Git, including creating branches, merging code, resolving conflicts, and maintaining a clean commit history.

📱 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...

𝐖𝐞 𝐨𝐟𝐟𝐞𝐫 𝐅𝐑𝐄𝐄 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐚 𝐅𝐑𝐄𝐄 𝐪𝐮𝐢𝐜𝐤 𝐫𝐞𝐯𝐢𝐞𝐰 𝐨𝐟 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭, 𝐚𝐧𝐝 𝐮𝐬𝐮𝐚𝐥𝐥𝐲 𝐫𝐞𝐬𝐩𝐨𝐧𝐝 𝐰𝐢𝐭𝐡𝐢𝐧 𝐚 𝐟𝐞𝐰 𝐡𝐨𝐮𝐫𝐬. We are Teaser Software, an ITO company based in Hanoi, Vietnam. If you’re looking for a reliable team to take your project from idea → design → development → launch → maintenance, while leveraging AI to accelerate development and improve efficiency without compromising quality, you’re in the right place. Whether you already have a detailed specification or just an initial idea, we can help shape it into a clear roadmap with realistic timelines and costs. 𝐋𝐞𝐭’𝐬 𝐜𝐨𝐧𝐧𝐞𝐜𝐭. 𝐉𝐮𝐬𝐭 𝐬𝐞𝐧𝐝 𝐮𝐬 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐚𝐧𝐲𝐭𝐢𝐦𝐞. 𝐖𝐞 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐭𝐢𝐦𝐞 𝐳𝐨𝐧𝐞𝐬, 𝐬𝐨 𝐨𝐮𝐫 𝐭𝐞𝐚𝐦 𝐢𝐬 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝟐𝟒/𝟕, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐰𝐞𝐞𝐤𝐞𝐧𝐝𝐬.

🔥 Senior Frontend & Mobile Developer — React Native | Flutter | Angular | AI Integration With 8+ years of hands-on experience, I build high-performance, cross-platform mobile and web applications that merge speed, reliability, and modern user experience. I specialize in clean architecture, scalable development, and AI-powered features — helping businesses launch faster, innovate confidently, and grow sustainably. ⸻ 📱 Mobile & Cross-Platform Expertise • Build modern, responsive apps using React Native, Flutter, and Angular • Develop custom native modules (Swift, Kotlin, Objective-C, Java) for hardware-level integrations • Engineer AI-driven features such as: • 🧠 Text-to-Video, Text-to-Image, Audio & Voice Processing • 🎙️ Speech recognition, real-time transcription, voice assistants • 🤖 OpenAI, Gemini, and custom ML model integration • Integrate Firebase, GraphQL, REST APIs, WebSockets, offline-first data • Full delivery pipeline: CI/CD (Fastlane, Bitrise) → App Store / Play Store publishing • Performance monitoring with Crashlytics, Sentry, and analytics tools ⸻ 🗺️ Newly Added Projects 📍 Mapbox Vessel Booking & Tracking App (Mobile + Web) • Built a real-time vessel tracking & booking system using React Native + Mapbox • Integrated weather layers, ocean particles, live vessel positions, and custom mapping logic • Built web version with Angular + Mapbox • Included live updates, notifications, and role-based dashboards 📺 TV App Using Expo • Developed a smart TV app using Expo • Optimized for remote navigation, large screen layout, and low-latency data display • Integrated streaming, analytics, and adaptive UI for TV platforms ⚽ Flutter Sports App — Livestream + Player Assessment + Marketplace • Built a sports livestreaming app in Flutter • Includes player performance scoring, analytics, and review workflows • Integrated features for buying/selling players, profiles, and team management • Supported real-time video, chat, and cloud storage ⸻ ⚙️ Core Tech Stack Languages: JavaScript, TypeScript, Dart, Swift, Kotlin Frameworks: React Native, Flutter, Angular AI & Native: T2V, T2I, Voice Processing, OpenAI, custom ML, native modules Mobile Tools: Firebase, SQLite, Fastlane, Crashlytics, CodePush, Expo Web Tools: RxJS, NgRx, Tailwind, SCSS DevOps: Git, Bitbucket, Bitrise, Postman, Sentry ⸻ 🚀 Advanced Capabilities • AWS, dynamic links, affiliate systems • In-app purchases with RevenueCat • Video calls, chat messaging, screen sharing, PiP mode • Healthcare integrations with biometric / IoT devices • Booking platforms, passkey authentication, real-time sync ⸻ 💡 Professional Values I believe great products are built through a mix of technical mastery, clear communication, and strong ownership. My mission is to convert complex ideas into impactful digital experiences — blending creativity, engineering excellence, and real business value.

🧠 Senior Fullstack Team Lead | Mobile, IoT & AI App Developer | 6+ YOE | Flutter | Kotlin | Python | C++ I'm a Fullstack Team Lead and Mobile Developer with over 6 years of professional experience, building and launching cross-platform apps in mobile, desktop, and IoT ecosystems. I specialize in Flutter, Kotlin/Jetpack Compose, Ktor backend, and real-time technologies like Bluetooth, HID, WebRTC, and SocketIO. I’ve led full product lifecycles—from architecture to deployment—on apps that integrate hardware control, real-time communication, and AI-enhanced features, while delivering seamless user experiences across Android, iOS, and embedded systems. 🔧 Skills & Tech Stack Frontend & App Development: Flutter, Android (Jetpack Compose + XML), Kotlin, Java, SwiftUI Backend Development: Ktor (Kotlin), NodeJS, Python, Spring Boot, RESTful APIs Real-time & Embedded: Bluetooth LE, Serial Port, HID, WebRTC, FFmpeg, C++, Oboe Database & Cloud: Firebase (RTDB, Firestore, Auth), PostgreSQL, MySQL, SQLite, ObjectBox AI Integration: Tensorflow Lite, PyTorch, GPT API (Chatbot, Voice Transcription) CI/CD & Publishing: In-App Purchases, Mobile Ads (AdMob, AppLovin), Play Store, App Store 🚀 Highlight Projects 🎵 Smart Karaoke System (2024 - Present) Fullstack architecture for IoT-based karaoke system (5-member team) Tech: Flutter, Ktor, C++, FFmpeg, Serial Port, SocketIO, JavaFX, PostgreSQL Role: Architected system, managed backend & embedded communication, led team & QA 🖨 AirPrint – Mobile Wireless Printer App Print, scan, photo edit, Google Drive, and document conversions Tech: Flutter, Jetpack Compose, Firebase, Bluetooth, REST API Role: Solo Dev | Published on Play Store 🎮 XB Remote Play – PS4/PS5 Game Controller Stream console screen to mobile, cast multimedia, built-in game store and chatbot Tech: Flutter, WebRTC, C++, Firebase, SocketIO 🧠 Active9 – AI Health & Fitness Tracker Cross-platform health monitor app with AI voice & camera integration Tech: Flutter, NodeJS backend, Firebase, Google Ads Role: Fullstack Dev | Android / iOS 💡 IoT Controller Suite Devices: Smart LED Light, Canon/Brother Printer, Roku TV, LG ThinQ Tech: Flutter + Embedded C++ + BLE/HID + Python backend Role: Developed utility tools & device control protocols 🧭 Team Lead Experience Managed teams of 3–5 developers (Agile workflow, daily standups, code reviews) Mentored junior developers in mobile architecture and performance optimization Defined coding standards, release strategy, and quality assurance process Liaised between stakeholders, product owners, and QA during tight timelines 💬 Why Work With Me? I build feature-rich apps that bridge hardware and software I focus on clean architecture, maintainable code, and scalable design I value communication, timely delivery, and aligning with your business vision I constantly learn and integrate new tech to give your product an edge 🔗 Let's Build the Next Big Thing I bring a rare combination of deep technical skill, real-time system experience, and hands-on leadership. Whether you're launching a new product, rebuilding a legacy system, or integrating IoT devices, I can help turn your ideas into scalable, production-ready solutions. Let’s connect and bring your vision to life. Warm regards, Nguyễn Thiện Quang

It must be a hassle to develop mobile apps that are not only well functioned, blazing fast but also have to comply with Apple and Google guidelines. This daunting experience is entirely familiar to an experienced mobile developer like me. I have spent more than 7 years immersed in Apple iOS app development, witnessing iOS evolved from version 7 into 14 as of today. By servicing 15000+ Upwork hours delivering dozens of mobile projects, I know exactly how to bring my substantial experience to leverage your next innovative products, which includes but is not limited to: 📱 Build your app with the latest Apple iOS / Google Android SDK 📱 Setup mobile QC by adding any of unit tests, integration tests, automation tests... 📱 Setup mobile DevOps CI/CD pipeline using Bitrise, Fastlane... 📱 Assist in Apple and Google Play store submission and approval process 🤷‍♂ ️Something else missing? Feel free to throw it up to me. Challenge accepted! 🎖 Google Certified Associate Android Developer [ myup.work/hautt-aad ] 🎖 Scrum.org Certified Professional Scrum Developer [ myup.work/hautt-psd ] 📱 𝐈𝐎𝐒 ✅ 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄: MVVM, VIPER, RxSwift ✅ 𝐒𝐓𝐎𝐑𝐀𝐆𝐄: Realm, CoreData, Keychain, SQLite ✅ 𝐍𝐄𝐓𝐖𝐎𝐑𝐊𝐈𝐍𝐆: AFNetworking, Alamofire, Moya, Reachability ✅ 𝐈𝐌𝐀𝐆𝐄: SDWebImage, Kingfisher, AsyncImageView, Toucan ✅ 𝐓𝐃𝐃: Quick, Nimble ✅ 𝐎𝐏𝐒: Bitrise, Fastlane, TravisCI, TestRails, swiftlint, swiftformat 📱 Flutter ✅ 𝐀𝐑𝐂𝐇𝐈𝐓𝐄𝐂𝐓𝐔𝐑𝐄: Provider, BLoC, MobX, GetX ✅ 𝐒𝐓𝐎𝐑𝐀𝐆𝐄: Shared preferences, sqflite, sembast, Cookiejar, mmkv_flutter ✅ 𝐍𝐄𝐓𝐖𝐎𝐑𝐊𝐈𝐍𝐆: Dio, Flutter Downloader ✅ 𝐈𝐌𝐀𝐆𝐄: Cached Network Image, Bitmap, Photo View ✅ 𝐓𝐃𝐃: Mockito, Flutter Widget Test ✅ 𝐎𝐏𝐒: Bitrise, Fastlane