• Migrated over 100,000 line code changes from Objective-C to Swift code base of the production applications. • Increased code coverage rate from 30% to more than 70% by working with three colleagues. • Developed e-commerce hybrid apps with Rakuten backend platform to serve data in Global & Taiwan Ichiba Mobile Apps. • Integrated 3-rd party payment, logistics services of NewebPay into Rakuma App, a C2C online flea market platform. • Implemented cookies management, WKWebView, and unit tests for API networking requests, data validation, business logic.

• Developed native iOS(Obj-C, Swift) & Android(Java) app prototypes for pitching ideas to investors. • Aligned apps to follow Human Interface Guidelines & Material Design Guidelines. • Developed backend cloud services(Node.js) such as activity & health data tracking on Parse platform. • Cooperated with hardware & firmware teams for clinical blood pressure monitoring by Bluetooth Low Energy custom protocol.

• Introduced GitFlow as Git branching model for the team and completed project deliverables within agreed timeframes. • Developed file synchronization across multiple devices, TCX & JSON file serialization and deserialization. • Developed time-line summary chart for activities with implemented past time slots search functionality. • Implemented auto-layout for showing better tracking information across multiple dimensions in Portrait & Landscape modes. • Integrated real-time GPS tracking and standard BLE running, cycling, blood pressure and heart rate profiles on the map.

• Developed backend cloud services(Node.js) such as image resizing, dominate color extracting on Parse platform. • Developed auto-trigger mechanism with push notification service to notify users when their watch-list goods backing in stock. • Integrated location service for finding nearby stocks & stores and developed cart tracker for tracking shopping list cost. • Developed internationalization and localization in multiple languages(English, Chinese, Japanese, Korean).

• Integrated multiple social media platforms such as Facebook, Twitter, Sina Weibo, YouTube. • Integrated Geofencing Cloud Service of Geoloqi to send users with push notifications when entering the geofenced area. • Practiced Agile development in Scrum, Kanban style project management in Trello and JIRA bug tracking system.