Thien Tran

Senior Mobile Developer

Hanoi, Vietnam

#OpenToWork

About

Mobile Developer with ~7 years of experience in React Native and Flutter, contributing to large-scale fintech products — from the ATX digital asset exchange (~2M users) to the Finpath stock-analysis app (140K users). Led the codebase migration from React Native to Flutter and built a custom trading chart engine from scratch with Canvas/CustomPainter to replace TradingView — with feature parity to the charts of leading global exchanges (Binance, OKX, Bybit), optimizing render performance and enabling full UI/UX customization per product. Implemented and customized native modules (Android/iOS) tailored to application features. Operated an AI-augmented workflow with Claude Code and Cursor — building rules, skills, and subagents to standardize output and boost overall mobile-team productivity. Collaborated cross-functionally end to end: with Product/Design on UX, with Backend on API/Socket performance, and with Support on fixing bugs from end-user feedback. Career goal: Senior Mobile Engineer / Mobile Tech Lead.

Experience

React Native + Flutter Developer

ATX Global / Finpath JSC

Jan 2022 – Present

- Developed and maintained the iOS/Android app serving ~2M registered users; grew MAU 4x from 120K (2024) to 480K (2025). - Built a custom trading chart engine from scratch with Flutter Canvas/CustomPainter, fully replacing TradingView — delivering smooth real-time candlestick rendering, full UI/UX control per product, and removing third-party dependency. Sustained ~60 FPS while streaming live candles, with feature parity to the charts of leading global exchanges (Binance, OKX, Bybit). - Optimized chart and candle loading: cut initial load time from ~1s to ~100ms through caching, payload reduction, and batched/lazy data fetching. - Engineered the real-time price board and order management to handle high-frequency WebSocket updates with no UI jank, improving rendering smoothness on lower-end devices. - Led the codebase migration from React Native to Flutter (2024). - Developed core trading and wallet features — order placement, open-order tracking, balances, and transaction flows — with a focus on performance and reliability. - Reduced socket payload size by ~70% via diff-based updates and lighter message formats. - Live: App Store | Google Play

FlutterReact NativeWebSocketMobile DevelopmentApp Store

React Native Developer

Dolphin JSC

Jan 2020 – Dec 2022

Team: 3

React NativeMobile DevelopmentJavaScript
Mimas JSC

React Native Developer

Mimas JSC

Jan 2019 – Dec 2020

Team: 5

React NativeMobile DevelopmentJavaScript

Education

Hanoi University of Science and Technology

Hanoi University of Science and Technology

Software Engineering

2014 – 2019

Skills

CursoriOSJavaScriptJavaScriptTypeScriptDartMobileAndroidReact NativeFlutter

Languages

Vietnamese (Native or bilingual proficiency)English (Limited working proficiency)