Tuyen V.

OVERVIEW I build mobile apps that talk to real hardware — reliably. Whether your product is a medical device, wearable, or audio device connecting over Bluetooth Low Energy (BLE), I can help bring it to life on iOS and Android. I'm an experienced mobile app developer specializing in cross-platform development using Flutter and React Native, as well as native iOS and Android code. If you're building a connected product and need a mobile developer who understands both the app side and the hardware side, let's talk. KEY SKILLS 🔹 Cross-Platform Development: Proficient in building robust, feature-rich applications in Flutter and React Native. 🔹 Bluetooth Low Energy (BLE): Expertise in implementing BLE protocols for secure and efficient communication between apps and medical devices. 🔹 Hybrid Native BLE Architecture: Experienced in combining Flutter with native platform channels — building UI and business logic in Flutter while delegating critical BLE operations to thin native layers: Swift (CoreBluetooth) on iOS and Kotlin (BluetoothGatt) on Android. This approach delivers the reliability of native BLE with the development speed and UI simplicity of Flutter. 🔹 UI/UX Optimization: Design and optimize interfaces to display medical data clearly and intuitively. 🔹 Health Data Management: Knowledgeable in handling sensitive health-related data, ensuring privacy and regulatory compliance. 🔹 API Integration: Skilled in integrating third-party APIs and databases for extended functionality. EXPERIENCE HIGHLIGHTS 🔹 Built apps connecting to health monitoring devices (ECG, PPG, IMU, heart rate sensors) with real-time streaming 🔹 Implemented OTA firmware updates streamed over BLE from the app 🔹 Collaborated directly with firmware & hardware teams to ensure accurate data capture and smooth app-device interaction 🔹 Shipped device pairing flows, background sync, and alert systems that users love TECH STACK 🔹 Languages: Dart, JavaScript, TypeScript, Swift, Kotlin 🔹 Frameworks: Flutter, React Native, Android Native, iOS Native 🔹 BLE: CoreBluetooth (iOS), BluetoothGatt (Android), flutter_blue, react-native-ble-plx, Platform/Method Channels 🔹 Backend & Data: Firebase, SQLite, REST APIs, AWS 🔹 Tools: Git, CI/CD Let's talk about your device and your app. Send me a message with what you're building — I'll reply with a concrete plan for the BLE architecture and UI.