Jump Trading, the electronic trading firm, is understood to have lost the head of its London office to a quantitative hedge fund.Pierre Lafitte, a quantitative trader and team leader in Jump's London office, is understood to have left for Qube Research and Technologies. Multiple sources confirmed the move, but neither Lafitte nor Jump nor Qube responded to a request to comment.Lafitte spent nearly 12 years at Jump after joining from BNP Paribas in 2012. He's a graduate of France's École Polytechnique.Lafitte's London office exit follows that of Peter Deaner, the COO of Jump Trading Europe.