David Lieb is a Group Partner at YC. He was previously the co-founder and CEO of Bump (S09), a mobile app used by more than 150M people to share photos and contact info by bumping their phones together. Bump was acquired by Google in 2013, and an unreleased photo-sharing app they were building became the foundation of Google Photos. Before Bump, Dave was a researcher in the Stanford AI Lab and a software engineer at Texas Instruments. He holds EE/CS degrees from Princeton and Stanford and finished half an MBA at Chicago Booth before dropping out to start Bump.