Designed and implemented APIs to support Airbnb's Resolution Center.

* Implemented events in Airbnb's payments systems to report financial activities on the platform.

* Designed and implemented APIs and a React-Redux application to provide a unified checkout experience for all Airbnb products.

* Designed and implemented an idempotency framework for Airbnb's e-commerce system.

* Leading a cutover of legacy data models accesses to new APIs during Airbnb Payment's Service-Oriented-Architecture migration.

CMU 15440/15640 Distributed systems

Setup search engine on Twitter's products platform to enable products searching.

Implemented ingestion jobs for importing products from external feeds.

Developed lightweight framework to facilitate writing hadoop jobs for analytics.

MySQL performance tuning. Reduced query time from about 1 minute to several seconds.