Tristan E. O'Tierney '08 (computer science) co-founded the popular mobile payment company Square in 2009. Working with Twitter cofounder Jack Dorsey, O'Tierney developed Square's original iPhone application and contributed to the development of Square's iPad application and Square Wallet.
Prior to Square, O'Tierney worked on a variety of Mac-related projects for Silicon Valley powerhouses Yahoo!, VMware and Apple before being contracted to develop the mobile application for President Obama's 2008 campaign. He first caught Dorsey's attention when he built Twinkle, one of the first ever Twitter client apps.
Today, O'Tierney is a globetrotting photographer whose mesmerizing work can be viewed at www.otierney.net.