Andrew Vyrros, the man who led development on iMessage and FaceTime while at Apple, has left the company for messaging startup Layer. The company announced the news yesterday, but Vyrros left Apple several months ago, sources tell The Verge, where he was also responsible for Apples push notification services, iTunes Genius, Game Center, and Back To My Mac. Prior to Apple, Vyrros held leadership roles at Yahoo and Xerox PARC, and was a developer at Steve Jobs NeXT computer company. Not much has been written on Vyrros, who has remained mostly under the radar during his time at Apple, but his contributions were immeasurable, sources say. Layer also provides push notification services, cloud sync, offline storage, and most other services a message app would need. Layer hopes to offer up these services for a small fee.