Bill Salak has more than 15 years of experience overseeing large-scale development projects and has more than 20 years of experience in web application architecture and development. Bill founded and served as CTO of multiple Internet and web development companies, leading technology projects for companies including Age of Learning, AOL, Educational Testing Systems, Film LA, Hasbro, HBO, Highlights for Children, NBC-Universal, and the U.S. Army. Bill currently serves as the CTO of Brainly, the world's largest educational community with over 200 million monthly unique users.