Cook is the principal co-author of the
OAuth and
WebFinger specifications. He is the former lead developer of social networking site
Twitter. He has also worked for
Yahoo! on the
Fire Eagle project and for
BT Group as part of their
open source Osmosoft team. He was founder of collaborative text editing startup Poetica. Poetica was acquired by
Condé Nast in March 2016, and Cook remained with the company as a staff engineer. ==References==