Brian Johnson

San Francisco Bay Area, CA-California United States

Engineering Director, Search Recall & Spam

Technology / Software / Internet

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...