 He would then go on the co-found Passenger before serving as General Manager of Microsoft's .NET services and later leading the webOS software development team at Palm.In May 2010, Abbott joined Twitter as Vice President of Engineering.At Twitter, Abbott is credited with rebuilding and solidifying Twitter’s infrastructure, growing the engineering team from 80 to more than 350 engineers in less than a year and a half, and scaling Twitter’s architecture to support hundreds of millions of daily tweets.