Tristan OTierney, who helped develop Squares original payment app, has passed away

Tristan OTierney, a cofounder of the payments company Square has passed away at age 35. According to the San Francisco Chronicle, OTierney died last weekend in Florida or addiction-related causes after a hospital was unable to revive him.
In the Chrons piece, it reports that Square cofounders Jack Dorsey and Jim McKelvey hired OTierney to develop Squares original mobile payment app in early 2009, and that OTierney is generally credited as a co-founder.
He left the company in 2013, eight years after coming to the Bay Area, where he also worked as a software engineer at Yahoo for nearly two years and worked briefly at Apple, VMware, and Tapulous.
In recent years, OTierney had been working as a freelance photographer in Los Angeles, according to his LinkedIn profile. (You can check out some of his work here.)
He was also the director of mobile at a short-lived San Francisco-based company that Voteraide that aimed to empower voters by enabling them to interact with candidates and elected officials as verified voters.
OTierney was reportedly in Florida as part of a months-long rehabilitation program.
Dom Sagolla, a former colleague and roommate of OTierney, tells the Chron it was he who introduced OTierney to Dorsey 11 years ago. He says OTierney had helped to develop the official iPhone app for Barack Obamas 2008 presidential campaign and that OTierney and Dorsey met at an iPhone-app development event that he organized. I will really miss him and want his memory and legacy to last, said Sagolla.
OTierney clearly had varied interests. Though he studied computer science at the Rochester Institute of Technology, he also later obtained a Master of Fine Arts degree from the San Francisco Art Institute. On Instagram, his descriptor reads: Square co-founder turned traveling photographer. Searching for the meaning of life and got lost along the way.
Pictured above: a landscape photo of Death Valley by OTierney.
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