Made docker images and kubernetes manifests for web services; implemented a broker which starts kubernetes jobs for a internal job scheduling system; enhanced user password encryption; wrote credential access utility for loading credentials from Vault; set up and managed ELK cluster for log management; managed the the data flow and ELK cluster for user profiling; implemented backend services for features (e.g. idea books, discussion forums); built a traffic reply tool based on open source code to load test the website during AWS/kubernetes/PHP7 migration; migrated the largest table in prod DB to different shard; wrote a tool for managing AWS IAM users; operational tasks, e.g. rolling out code to production and on call duty.

Work in Office Trustworthy Computing Team: maintain and improve the Office performance monitoring infrastructure; investigate performance of pre-production Office products; fix bugs of the systems owned by the team.

Worked on Amazon Web Service billing systems: worked with multithreaded C++ system, used Amazon SWF (Simple Workflow); wrote Ruby scripts to access database; wrote JUnit tests and Ruby test scripts; took operational tasks.