Hire the Best WinDev Mobile Specialists

🌟 Top-Rated Plus by Upwork 🌟 I'm a Senior Developer with a wealth of experience in Android & iOS development, both frontend and backend. I do native development (Swift, Kotlin) and frameworks such as React Native and Flutter. Skillset includes: ✔️ Native Android Development (Java, Kotlin, C++) & iOS (Swift, Objective-C) ✔️ Kotlin multiplatform (Android, iOS, Web, Desktop) ✔️ Compose multiplatform ✔️ Flutter (Dart) ✔️ React Native ✔️ Ionic/Xamarin - Capacitor - Svelte ✔️ Backend Development (Spring Boot, Django, PHP + SQL/noSQL) ✔️ PC App Development (Node.js, Ruby on Rails, Qt Python, Kotlin Multiplatform) ✔️ Web App Development (JS/Wasm, Svelte, WordPress, Kotlin Multiplatform) 🎯 I am triliingual, I speak Arabic (natively), English, and French 🎯 I leverage AI agentic coding to bring the products I make for you to perfection and cut development time in half

Building a mobile app is one thing. Building a product that connects AI, cloud services, IoT devices, and real-time communication reliably is a completely different challenge. I help startups and businesses build mobile products that are ready for production. My work focuses on Flutter, AI integration, IoT, BLE, NFC, Firebase, AWS, Google Cast, Alexa Skills, and native Android & iOS development. I have worked on AI-powered apps, NFC passport verification, smart home platforms, streaming applications, and cloud-connected mobile systems. My role isn't just building the app; it's making sure every part of the system works together reliably. If you need someone who can take ownership of the mobile architecture and deliver a product that's built to scale, I'd be happy to discuss your project.

🚀 Ranked #1 iOS Developer on Upwork in Vietnam 🇻🇳 Trusted by startups and growing businesses to build, launch, and scale native iOS apps With 9+ years of experience in Apple development, I've helped startups, SaaS companies, and growing businesses transform ideas into high-quality native iOS applications used by thousands of users. Whether you're launching a new product, modernizing an existing app, or bringing your Android/Web platform to iOS, I deliver scalable, maintainable solutions with clean architecture and an exceptional user experience. What I can help your business with - End-to-end iOS app development - Native iOS apps using Swift & SwiftUI - Convert Android/Web apps into iOS apps - MVP development for startups - Long-term product maintenance & scaling - Performance optimization & refactoring - UI/UX implementation with pixel-perfect accuracy - App architecture improvement & technical consulting - Team collaboration and Agile/Scrum workflow Technical Expertise - UI Development: UIKit, SwiftUI, Auto Layout, Core Animation - Reactive Programming: RxSwift, Combine - Networking & API Integration: RESTful APIs, URLSession, Alamofire - Backend & Cloud Services: Firebase, Firestore, Authentication, Analytics - Push Notifications: APNs, Firebase Cloud Messaging (FCM), OneSignal - Architecture Patterns: MVVM, Clean Architecture, Modular Architecture - Local Storage & Database: CoreData, UserDefaults, Realm - Media & Realtime Features: AVFoundation, WebSocket - AI & AR Features: CoreML, ARKit, Vision Framework - Authentication & Security: OAuth, JWT, Keychain - Maps & Location Services: MapKit, CoreLocation, Google Maps SDK - Testing & Debugging: XCTest, Instruments, Memory Leak Detection - CI/CD & Version Control: Git, GitHub, Fastlane, Xcode Cloud - Project Management: Agile, Scrum, Jira, Trello Why clients work with me - 9+ years of professional iOS experience - Successfully launched and maintained production apps - Strong focus on clean, maintainable, scalable code - Clear communication and reliable delivery - Experience collaborating with startups and remote teams - Detail-oriented with strong debugging and problem-solving skills - Long-term partnership mindset I care about building stable products that support real business growth — not just writing code. If you’re looking for a reliable iOS engineer to build, improve, or scale your mobile product, let’s connect.

📱 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...

Apologies for my young appearance, I'm actually 29 years old now. I have much experience in three areas: application development for React Native, Flutter and Android(Java, kotlin) applications. Is a dynamic person, love to learn new technologies, as well as worked through many projects in areas such as crypto, e-commerce, health monitoring, video streaming, social network, AI etc 📱 𝐑𝐄𝐀𝐂𝐓 𝐍𝐀𝐓𝐈𝐕𝐄 💼 6 years experience ➡️ 𝐴𝑅𝐶𝐻𝐼𝑇𝐸𝐶𝑇𝑈𝑅𝐸: Redux, MobX, Zustand ➡️ 𝑆𝑇𝑂𝑅𝐴𝐺𝐸: react-native-sqlite-storage, Realm, react-native-async-storage, react-native-mmkv, watermelonDB ➡️ 𝑁𝐸𝑇𝑊𝑂𝑅𝐾𝐼𝑁𝐺: Axios, apisauce, react-native-app-auth, react-native-simple-auth, react-native-background-upload, react-native-async-http, react-native-ssl-pinning, socket-io ➡️ 𝐼𝑀𝐴𝐺𝐸: react-native-fast-image, react-native-svg, react-native-safe-image, react-native-photoeditorsdk ➡️ 𝑇𝐷𝐷: jest, mocha, chai, Enzyme, react-native-mock, maestro, storybook ➡️ 𝑂𝑃𝑆: Bitrise, Fastlane, AppCenter, AWS 📱 𝐅𝐋𝐔𝐓𝐓𝐄𝐑 💼 3 years experience ➡️ 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, maestro ➡️ 𝑂𝑃𝑆: Bitrise, Fastlane, AppCenter, AWS 📱 𝐀𝐍𝐃𝐑𝐎𝐈𝐃 (𝐽𝐴𝑉𝐴, 𝐾𝑂𝑇𝐿𝐼𝑁) (𝘎𝘰𝘰𝘨𝘭𝘦 𝘤𝘦𝘳𝘵𝘪𝘧𝘪𝘤𝘢𝘵𝘦 📜) 💼 7 years experience ➡️ 𝐴𝑅𝐶𝐻𝐼𝑇𝐸𝐶𝑇𝑈𝑅𝐸: RxJava, Retrofit, Dagger Hilt, Coroutines ➡️ 𝑆𝑇𝑂𝑅𝐴𝐺𝐸: Room, Sqlite, Realm ➡️ 𝑁𝐸𝑇𝑊𝑂𝑅𝐾𝐼𝑁𝐺: AppAuth-Android, AsyncTask, android-async-http ➡️ 𝐼𝑀𝐴𝐺𝐸: Glide, lottie-android, ➡️ 𝑇𝐷𝐷: junit, androidx.test:core, mockito, robolectric, Espresso ➡️ 𝑂𝑃𝑆: Bitrise, Fastlane Thank you for viewing my profile🔥🔥🔥!

🧠 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