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Square co-founder O'Tierney exits, continuing string of exec departures

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Square co-founder Tristan O'Tierney has left the fast-growing mobile payments startup, announcing his exit via Twitter.

Tristan O'Tierney

Tristan O'Tierney

"Today was my last day at @Square," O'Tierney tweeted Friday. "It's been an incredible 4 years. What's next? Not sure yet, except for a bit of traveling!"

O'Tierney and Twitter co-founder Jack Dorsey launched Square in 2009. The firm's signature Square Card Reader solution enables merchants to swipe credit and debit cards through a small dongle plugged into devices running Apple's (NASDAQ:AAPL) iOS and Google's (NASDAQ:GOOG) Android. Square has since rolled out a series of complementary applications and services and now processes more than $15 billion in annual payments, serving more than 4 million North American businesses and individuals.

Prior to teaming with Dorsey, O'Tierney built the official Obama 2008 presidential campaign app and created Twitter client Twinkle while employed as an iOS developer at gaming firm Tapulous. He and Dorsey first met at iPhoneDevCamp in 2008: While Dorsey built the Square Card Reader dongle, O'Tierney developed the accompanying Square app for iOS. 

O'Tierney is the latest high-profile executive to exit the Square ranks in recent months. CFO Keith Rabois resigned in January, later denying allegations of personal misconduct; last month, AllThingsD reported that Vice President of International Alyssa Cutright left after one year on the job, followed by Vice President of Partnerships Alex Petrov, deciding against joining the Square ranks three weeks after the company announced his hiring. Insiders speculate the Cutright and Petrov moves are in response to the hiring of ex-Google exec Francoise Brougher as business lead.

For more:
- read this VentureBeat article
- read this Next Web article

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