At Happy5, I led a four-engineer team migrating Happy5 Culture and Happy5 Performance from native apps to React Native. We reached about 60% of each app in two years while keeping both live.
I owned the mobile team’s code standards, reviews, and delivery quality, helping shorten release cycles from two weeks to one. I also bridged native gallery, camera, and video recorder features so they continued working during the migration.
I delivered goal, task, and feedback features, integrated REST APIs, and enabled offline mode with React Query, Zustand, and React Context. I also added Firebase Push Notifications, Firebase Analytics, and Amplitude to the apps.
I implemented mobile security measures including SSL pinning and Keychain secure storage, and integrated Sentry and Firebase Crashlytics for production monitoring. Earlier at Happy5, I built the iOS React Native bridge with TurboModules, Swift, and Objective-C, and developed native iOS and Android apps.
