Bob Lee (December 20, 1979 – April 4, 2023) was an American businessman and software engineer who was best known for helping to create the financial service Cash App.

[5] While attending Lindbergh High School,[6] Lee wrote a 3D rendering engine in Turbo Pascal,[7] and became known as "Crazy Bob" for his exuberant energy in playing water polo.

[8] On August 7, 2001, Lee released a free program to defend Microsoft IIS servers from Code Red, which was at the time a rapidly spreading computer worm.

[11] Lee was employed at Google as a staff software engineer from October 2004[12] to January 2010[13] and helped develop the Android mobile operating system.

[14] Lee co-authored the dependency injection framework Guice with Kevin Bourrillion in 2006 while at Google to modularize AdWords.

[32] In the early morning of April 4, 2023, Lee was stabbed in the chest and hip while he was on the 300 block of Main Street in the Rincon Hill neighborhood of San Francisco.

[35][36][29] His autopsy report released by the San Francisco medical examiner's office showed that he suffered knife wounds to his heart and lung.

[38] On April 13, the San Francisco Police Department (SFPD) arrested 38-year-old Nima Momeni of Emeryville (born August 1984) for the murder of Lee.

[43] On May 14, 2023, The Wall Street Journal reported that Lee and Khazar Elyassnia (Momeni's sister) had a "casual sexual relationship" despite her being married.

[47][48] Randall Knox, an attorney who briefly represented Momeni's mother, Mahnaz Tayarani Babai, said that the jury had a lot to consider.

Tayarani then later spoke to the cameras on both KNTV and KGO-TV shortly after the verdict saying that her son was the kindest and had never done anything wrong before the murder despite him having a history of drug abuse.