Minecraft wiki entry for Warren_Loo, associated text: Warren 'EvilSeph' Loo is a game developer who formerly worked for Mojang Studios. The former leader of the Bukkit team, Loo was hired by Mojang to maintain the Minecraft servers and develop the official mod API. Before this was complete, his job capacity was broadened, to include general development. He announced his departure from Mojang on October 2, 2013, stating that he was looking to pursue other interests.[2]