Derek Nelson is a Co-Founder and CEO of PipelineDB, a Y-Combinator backed startup that has recently released an open-source streaming-SQL database based on PostgreSQL 9.4. PipelineDB runs continuous SQL queries on streaming data, incrementally storing results in tables. After serving in the Marines as a signals intelligence analyst and studying C.S. at UC Berkeley, Derek worked spent four years in Ad Tech helping build and scale AdRoll's data infrastructure from a single PostgreSQL box to one of the largest realtime systems in ad tech. His work building realtime systems at AdRoll was the inspiration behind PipelineDB.