David Selinger co-founded Redfin, where he helped build the world’s first real-time mapping and real-estate data-analytics engine. He also led the R&D arm of Amazon’s data-mining and personalization team while the company was relatively new. In 2006, Dave founded RichRelevance to help retailers transform customer data into extraordinary customer experiences, and has led the company to its current position as number one for personalization in both the U.S. and E.U. Currently, he is the co-founder and CEO of Deep Sentinel, a new security company that sets itself apart from the competition through the use of data analyzation and actual security guards that review footage.