- Designed and developed web crawler which crawled thousands product data from Amazon (Java, JSoup, Proxy)
- Developed Search Ads workflow which support: Query understanding, Ads selection from inverted index, Ads ranking, Ads filter, Ads pricing, Ads allocation (Java, Jetty, MySQL, MemCached)
- Predict click probability with features generated from simulated search log (Python, SparkMLlib)
- Implemented Query rewrite with word2vector algorithm (Python, SparkMLlib)