Revamped Groupon's pricing system - Pricing System 2.0.

• Team Lead: lead an engineering team of five, responsible for the company's Competitiveness track.

Daily work include leading daily standup, weekly sprints, design reviews, implementations, rollouts, monitoring, and leading retrospectives.

• Take complete ownership end to end: requirements discussions with PMs, design docs and reviews, implementation, testing, monitoring, and customer troubleshooting.

* Fullstack development in Python, PHP, data pipelines, Javascript, CSS.

• Design table schema for large data set, and optimize query for real-time query performance

• Build user-interactive views with javascript, jQuery, HTML, CSS and some third-party libraries

• Core engineer in designing and implementing Box Appplicant Tracking System(ATS) -- a customized web application for efficiently managing incoming resumes and potential Box hires.

• Build business logic and UI on top of Salesforce

• Use Force.com and Box API to make data storage

• Design database schema