Tristan O'Tierney

August 1, 1983February 23, 2019

Tristan O’Tierney passed away unexpectedly on February 23rd, 2019 in Ocala, FL at the age of 35. Tristan is survived by his parents, Pamela Tierney of Cypress, Texas and Mark Tierney of Irving, Texas, his daughter Rumi Ari O’Tierney (age 3) of San Pablo, his girlfriend, Anjela Ramos of Los Angeles, CA, his half-sister Terri Cloud in Cypress TX, and numerous Aunts, Uncles nieces, nephews, and cousins.

Tristan was born on August 1st, 1983 in Adak, AK and lived in several states before moving to Syracuse, NY. He graduated from the Rochester Institute of Technology in 2008 with a degree in Computer Science. After moving to the Silicon Valley, Tristan began working for Yahoo! as an engineer on the Yahoo! Messenger Team. He later went on to hold positions at Apple, VMware, and Tapulous before co-founding Square, the company which revolutionized payments in 2009 making it possible for anyone to accept card payments using a smartphone or a tablet computer.

On top of being an award-winning Apple developer, Tristan was an accomplished photographer who traveled the globe in search for that perfect moment to capture. His photography won significant recognition and was used by major publications. Tristan was also a sought-after speaker regularly sharing his experience and passion to help others.

A memorial is scheduled for Sunday, March 3rd at 3pm at Brookside Funeral Home in Houston Texas, with a reception to follow. All are welcome to attend and celebrate Tristan’s life. There will also be a separate memorial service in San Francisco in approximately 2-3 weeks.


Tristan O'Tierney

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Noemi Mones

March 4, 2019

It was my first day at Square back in 2011 and I remember being approached by your friendly smile and thinking how nice it was to feel welcomed at my first job out of college. Throughout my time at Square, we spoke frequently usually asking about how the other's workload was and what things were going on during the weekend. I won't ever forget Square's holiday party where you and I spent dancing on the dance floor next to MC Hammer and just having the time of our life.

I'll remember you reaching out to me when I moved to LA and us talking about the amazing reasons why we pursued the arts and a more creative life and I so wished we could have had more of these conversations. Of course you moved to LA and I was so happy to hear you continued pursuing your photography and looked forward to meeting your new dog and girlfriend.

But with work and conflicted timing we never did get to share our work with each other in the person, but we always supported each other through social media "likes" and comments. It was always in that small momentary praise of a "like" or a comment that I knew your creative spirit and mine with our friendship, no matter the distance, would always support each other and be connected in the ties of how we felt for art and creativity.

I'll miss you friend. I will always continue showing my love and support for your spirit, your photography, and all the art and creation your soul held in the short time of your life on earth.

Rest in peace, Tristan.


Dave Jenson

March 3, 2019

So very sad to hear of your passing Tristan! It doesn't seem so long ago that we were on spirited drives on Bay Area backroads enjoying the twisties and capturing the beautiful scenery with our cameras. I'll miss your humor and the insightful thought and idea provoking conversations we had. I regret not staying in better touch with you. I wish your family and friends all the comfort in the world during this difficult time. Tristan, you were an amazing person and made this world a better place!

Dorice Merritt

March 3, 2019

Our condolences to the family of Tristan O'Tierney. We are thankful that he was concerned for the "little guy" and developed the Square app. His memory will continue with every transaction.

Jai Benton-Hawkins

March 3, 2019

Our condolences to the family of Tristan O'Tierney from J and H Services LLC in Virginia Beach. We will remember the person who made it possible for small businesses like mine to accept electronic payments from wherever our work takes us, without the expense of a subscription. I will say "Thank you, Mr. O' Tierney," each time I accept a Square payment. God bless and keep the O'Tierney family. May grief be replaced by fond memories.

Rusty B

March 3, 2019

Thank you Tristan for introducing me to Ruby back in 2003. I went on to become an early Ruby on Rails developer, and it remains my favorite language today.

Carol Jackson

March 3, 2019

Thank for your great work that changed the world. I pray you and family have everlasting peace!