About Directly improving eBay revenue by millions of dollars per engineer per year via improvements to eBay search recall without degrading relevance. Using data mining, machine learning, and map/reduce hadoop.
* Spell Correction
* Query Rewrites/Reformulation
** Synonym expansions
** Acronym expansions
** Compound word and space synonym expansion
** Attribute expansions
** Category expansions
* Null/Low Recovery
* Related Search (2012)
Removing Search SPAM (Search Manipulation)
* Created new team to combat search engine manipulation (spam)
* 2012 Critical Talent & Engineering Champion awards
* Responsible for search recall, query rewrites/expansions, spell correction, spam, and related se...