According to TechCrunch, Xie left Facebook to work on a bespoke hyper-local location app. She had been a Facebook employee since 2012, and bringing stickers to desktop was her final project.
Stickers have been a craze in Asian messaging apps, but Facebook brought them to its network earlier this year. The super-sized emoticons started out as an addition for iOS, then later were added to Android. Tuesday, Facebook announced that desktop chat users can send stickers to friends.
Source … http://www.insidefacebook.com/2013/07/03/sophie-xie-stickers-leaves-facebook/
Image courtesy of Facebook.