© 2026 ABC News

London Breed, the mayor of San Francisco, said in a statement to ABC News that Lee's death marks a \"horrible tragedy.\"

\"My sympathies go out to his family and friends,\" Breed said. \"The police are actively investigating what happened and will share details as soon as they can.\"

Lee served as the first chief technology officer at Square, a digital payment company founded by former Twitter CEO Jack Dorsey.

\"Bob was a dynamo, a force of nature,\" Joshua Goldbard, the CEO of MobileCoin, told ABC News in a statement.

\"He was made for the world that is being born right now, he was a child of dreams, and whatever he imagined, no matter how crazy, he made real,\" Goldbard added.

\"PHOTO:
Illustration by Nikolas Kokovlis/NurPhoto via AP, FILE
PHOTO: In this photo illustration a Cash App logo seen displayed on a smartphone screen on a desk next to a Macbook in Athens, Greece, Oct. 4, 2022.
>

During the 2000s, Lee worked at Google, where he helped develop Android.

Cash App did not immediately respond to a request for comment.

Lee is survived by his wife, Krista, and their two children.

\"Bob's real resume is the hearts and minds he touched in his time on earth,\" Goldbard said. \"Bob's legacy is the feeling that you can make a difference if you try, and of course his amazing children.\"

ABC News' Annie Pong and Alex Stone contributed to reporting.

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