asio-based real-time bidding engine *Reduced price engine workload by prioritizing traffic Traffic filter *Increased exchanges onboarding with dynamic libraries and interface layer to plug them into the system *Simplified the routing business logic with priorities and communicated with Product Manager to maintain the logic Enrichment services: retrieve third-party data to help bidding engine compute competitive bid price *Authorized Digital Seller (ads.txt) and its mobile version app-ads **Eliminated counterfeit advertising inventories with a global average fraud rate of 5% *WhiteOps **Integration to keep our clients from fraudulent inventories with a global average fraud rate less than 0.1% On-call, Pager Duty, Service monitoring with Grafana and technical documentation support Production code version control with Git

Portal of trusted open source libraries *Analyzed component dependency and license compliance of nearly 50,000 open source libraries with Python *Implemented RESTful APIs in user authentication and package management for the akka-http backend with Scala

Implemented automatic contextual analyzing system with bag-of-word Bayesian Model Implemented a crawler to retrieve movie information from Yahoo Movies