David Baszucki is the co-founder and CEO of Roblox, the platform where tens of millions of people gather daily to play, build, and socialize inside user-generated virtual worlds.

Baszucki grew up in Eden Prairie, Minnesota, studied electrical engineering at Stanford, and in the late 1980s co-founded Knowledge Revolution with his brother Greg. There they built Interactive Physics, a 2D simulation that let students run physics experiments on screen — it sold millions of copies. MSC Software acquired the company in December 1998 for $20 million. After a few years running a division there, Baszucki left, hosted a libertarian talk radio show, drove across the West in a motorhome with his family, and eventually returned to a one-room office in Menlo Park with his old Knowledge Revolution engineer Erik Cassel. They began writing simulation code. The prototype was called DynaBlocks. It became Roblox.