Jeff co-founded Twilio in 2008 to bring communications into the world of software. Prior to Twilio, Jeff was co-founder and CTO of NineStar, founding CTO of Stubhub.com, co-founder, CEO and CTO of Versity and one of the first product managers for Amazon Web Services. He is the author of the best-selling book,Ask Your Developer: How to Harness the Power of Software Developers and Win in the 21st Century.
