David Brent Baszucki[1] (/bəˈzuːki/; born January 20, 1963), also known by his former Roblox username builderman, is a Canadian-born American entrepreneur, engineer, and software developer.

[2] While there, he did a summer internship at General Motors where he worked in a lab focused on controlling car engines with software.

[8][9] As a follow-up to Interactive Physics, Knowledge Revolution launched the mechanical design software Working Model in the early 1990s.

[14] In a June 2016 interview with Forbes, Baszucki stated that the idea for Roblox was inspired by the success of his Interactive Physics and Working Model software applications, especially among young students.

[15] He said he would donate any future compensation he earns from Roblox's listing on the New York Stock Exchange for philanthropic purposes.

[19] In September 2022, Baszucki, Google cofounder Sergey Brin, and Keystone Capital chairman Kent Dauten donated a combined $150 million toward bipolar disorder research and treatment.