Erik Cassel was a co-founder of Roblox Corporation and a key figure in the development of Roblox, a popular online platform that allows users to create and play games within a shared virtual world. Alongside David Baszucki, he co-founded the company in 2004 and worked as its Vice President of Engineering. Cassel was instrumental in shaping the technical foundation of Roblox, contributing to its innovative, user-generated gaming model that empowers players to be both creators and players.