David Choi is head of user research at Quora. Most recently, he was the lead user experience researcher at Nextdoor. Previously, he was a user experience researcher at Facebook, where he lead research efforts on Messenger. Prior to Facebook, he was a user experience researcher at Google, where he worked on products such as Gmail, Inbox by Gmail, Chrome, AdSense and Adwords. He holds a BS in operations and management information systems from Santa Clara University and an MSI in human computer interaction from the University of Michigan.