If Brian Chen at the NY Times is to be believed, Kevin Lynch is overseeing the software for this device.
http://www.nytimes.com/2014/09/08/technology/can-apple-build-a-cool-and-convenient-iwatch.html?_r=0
http://www.nytimes.com/2014/09/08/technology/can-apple-build-a-cool-and-convenient-iwatch.html?_r=0
The people who created the watch have been described by Apple employees as an all-star team. Apples top designers and engineers who worked on its iPhone, iPad and Macs are all part of it, several Apple employees said.
And important Apple executives have been closely supervising the product, employees say. Among them are Jeff Williams, Apples senior vice president of operations, and Jonathan Ive, Apples head of design. Other key players include Kevin Lynch, formerly chief technology officer of Adobe, who has been supervising the watchs software; Jay Blahnik, a fitness consultant who worked on Nikes FuelBand device; and Michael OReilly, a former chief medical officer of the Masimo Corporation, a company based in Irvine, Calif., that makes devices for monitoring patients.