In this talk, Manny will discuss the tension of optimizing APIs for different experiences, while supporting hundreds of endpoints and many web and mobile applications at extreme scale. In the last few years ESPN has made many iterations on its API platform, eventually settling on developing a Product centric architecture along with a new platform to build APIs. This new platform supports a two-layer architecture that allows ESPN to optimize both for engineering productivity as well as the Fan experience. In addition to the technical issues that the teams worked through, they also faced organizational challenges that this new approach helped mitigate. This new platform is now powering the recently redesigned ESPN.com site and mobile app. ESPN is able to push 1 million events out to Fans in less than 100 milliseconds, complete with fully autonomous scaling. On a busy day, over 3 Billion messages are pushed out to Fans!