Over 900 engineers joined us for YC’s annual Work at a Startup Expo. The event kicked off with our Female Founders & Engineers mixer, followed by our open Expo hall and pitches by 40 vetted & funded YC companies.If you weren’t able to make it, you can watch the keynote, hear the pitches and see which companies you might be interested in.If you’re considering joining a startup, sign up at Work at a Startup. Create a single application and have over 200 YC companies reach out to you about great software engineering opportunities.Opening Remarks. Ryan Choi, Product Manager, Work at a StartupKeynote. Geoff Ralston, President of Y Combinator Startup Pitches, A-O. Including Checkr, Callisto, Faire, Lob & OpenPhone. Startup Pitches P-Z. Including PullRequest, Readme.io, Scale, Segment & Standard Cognition.