Sampo Karjalainen (born May 2, 1977, in Tampere) is one of the original founders of Sulake and Habbo Hotel, an online social networking video game aimed at teenagers. Sampo has also been in other projects, including Bobba Bar for iPhone. Karjalainen is now the designer, chief executive officer, and co-founder of ProtoGeo Inc., the creators of the Moves fitness tracker app for iOS.He studied literature, theoretical physics and information processing at the University of Helsinki.