Bob Lee, creator of Cash App and former CTO of Square, stabbed to death


Bob Lee, the Chief Product Officer at MobileCoin, was killed in a fatal stabbing in San Francisco. Tuesday morning at 2:35 a.m. San Francisco Police Department responded to a report of a stabbing near the 300 block of Main Street in SoMa. He was taken to hospital, but succumbed to his injuries.

Shortly after, NBC Bay area reported that the stabbing victim was 43-year-old Bob Lee. MobileCoin confirmed the information in a statement sent out Bloomberg And ABC7 News.

Prior to joining MobileCoin, Bob Lee spent his first few years at Google at Android, focusing on core library development. He then joined Square – the payments company that later became Block – to develop the Android app. He became the company’s first CTO and also created Cash App.

Bob Lee, also known as ‘Crazy Bob’, was also an investor in tech startups. According to his LinkedIn profile, he invested in SpaceX, Clubhouse, Tile, Figma, Faire, Orchid, Addressable, Nana, Ticket Fairy, Gowalla, Asha, SiPhox, Netswitch, Found and others.

Following the news, there was a wave of grief in the tech community. “It’s real. Getting calls. Heartbreaking. Bob played a major role at Square and Cash App. STL man,” said Jack Dorsey, Block’s CEO, wrote on nose

“So sad to hear of the untimely passing of @crazybob. I first met him in the summer of 2006 – he didn’t care that I was only 14 and we talked about programming. We stayed connected over the years and he was an early supporter of Figma. It’s so hard to believe he’s gone,” said Dylan Field, CEO of Figma wrote on Twitter.

“What a disaster. I remember Bob’s code that yields certain numbers. Bob’s code is in Java, but uses clever backtracking techniques to achieve the best performance of many solutions in many languages,” hintymad wrote on Hacker News.

No arrest has been made in the case and the San Francisco Police Department has not shared any additional details.