Polly Anna Wu

Maintained the flagship product Whoscall, impacting over 500 million users, while ensuring Firebase Crashlytics stability rate remained above 99.5%. Modernized and re-architected the product focusing on modularization and migrating UI components to Jetpack Compose, contributing to a complete product revamp. Refactored legacy MVP and MVC architectures into a modular MVVM framework, utilizing MockK and JUnit to achieve 100% unit test coverage across modules. Developed a Kotlin SDK with decoupled Android components and interfaces optimizing cross-platform portability for seamless internal and OEM product integration, impacting 100k users across three Asian countries. Created automation tools using Linux shell scripting to process and categorize i18n image assets for over 5 languages and 3+ screen densities, helping a 10-member team reduce manual classification time by 80%.

1. Built a social video call app 'Chair' from scratch within 5 weeks, enabling peer-to-peer video calls using WebRTC and Firebase Firestore as the STUN server. 2. Designed and implemented an e-commerce auction app with real-time bidding, using WebSocket with a 7-member team including backend and iOS engineers.