Minecraft wiki entry for Jakob_Pors%C3%A9r, associated text: Jakob "JahKob" Porsér is a co-founder of Mojang Studios and was a game designer at Mojang until he left the company along with Markus Persson and Carl Manneh on November 6, 2014. Jakob is credited as lead designer on Caller's Bane, Mojang's second major project. Jakob has since stepped down as Lead Designer of the project to be replaced by Måns Olson.[3]