Nov 2021 – Oct 2024 · 2 yrs 11 mos · London, England, United Kingdom

• Booking.com is the leading online travel agency for booking accommodations, taxis, flights… available in 220 countries.
• Built native Flight product (in Booking app) using Redux-based architecture customized for Android.
• Led the migration from RxJava to Coroutines, bringing lightweight and efficient memory use for async programming.
• Applied Jetpack Compose to create efficient and reusable components that can be shared among vertical teams.
• Conducted & went FULL-ON with lots of experimental features in the Flight Booking Funnel.
• Conducted interviews and provided mentoring for a newly formed team in Bangalore, India.
• Thoroughly review teammates’ Merge Requests, point out mistakes in the logic, and give advice to the author to make the best decisions.

Aug 2019 – Jul 2021 · 1 yr 11 mos · Singapore

• Shopee is the leading e-commerce platform in Southeast Asia and Taiwan (300+ million monthly active users)
• Refactored & Revamped Login, Signup, Social Linking, OTP… pages to have better UI/UX, scalable codebase
• Converted MVP into MVVM architecture to make codebase more event-driven, less boilerplate, high testability.
• Integrated WhatsApp OTP as an alternative for SMS OTP, saving hundreds of thousands of dollars every month.
• Integrated Google, Apple Sign-In to the onboarding flow.
• Developed libraries to support cross-platform development:
• Developed App Routers library for Android/React Native/Web to navigate to any Shopee pages
• Developed React Native Bridges, Web Bridges for React Native/Web to call Android native methods.
• Invented an algorithm to measure the width of tabs so that Scrollable Tab can be best fit on various devices
• Developed Bash/Gradle scripts to automate some jobs, which saves engineer time
• Developed tools for Dev/QA easy to debug/test

Mar 2019 – Aug 2019 · 5 mos · Vietnam

Jul 2016 – Mar 2019 · 2 yrs 8 mos · Vietnam

• Zalo is the most popular messaging app in Viet Nam (8+ years old project).
• Research facial landmark detection on mobile (communicate with C++ using JNI).
• Research & Develop health tracking on android mobile using data from step counter, accelerometer sensors, GPS.
• Build reusable components that interacts with back-end for group-chat features.
• Draw complex custom views (group avatar, typing animation, poll UI, reminder UI, time picker…).
• Implement talkback interactive on custom views (for blinds people).
• Optimize UI performance by applying custom views, flattening layout, avoid over-drawing.