Content (Discover feed and Spotlight) Android

Facebook Live Infra and broadcasting performance and reliability. (Android)

FRL (Facebook Research Lab) infra libraries and SDKs including analytics, A/B testing, push notifications. (Android platform)

Android messenger efficiency team working on improving healthy metric: app size, disk footprint, battery, memory and app death.

In release engineer team as a full stack engineer. Worked on back-end service and android infras to better deliver latest version of Facebook to public

Product Intelligence Group

1. Built a training data management tool to manage training data of product. In php and js.

2. Added cross-category classification and cross validation to the existing classification pipeline which runs end-to-end from raw training data to models and test results. In java and python.

3. Built a result evaluation tool which shows precision & recall, confusion matrix of each category. In php and js.

Build a Word Extension tool, which builds a vector for entity based on search engine.

Implement a entity classification tool to get word-topic relevance to filter noisy data

Build part of knowledge Graph framework using Neo4j database.