Minecraft wiki entry for Markus_Persson, associated text: Persson started programming at the age of seven, using his father's Commodore 128. He produced his first game (a text-adventure) at the age of eight, with the help of type-in programs. In 2005 he started working as a game developer for King.com,[3] which he left in 2009 to work as a programmer at Jalbum. He is also one of the founders of Wurm Online.[4] After Minecraft sales grew he moved from full-time to part-time at Jalbum and then eventually left to focus full-time on Minecraft in June 2010; many of the original Mojang employees (including former CEO Carl Manneh) were also ex-Jalbum employees. After the full release of Minecraft (1.0.0), Persson transferred creative authority of the game's development to Jens Bergensten.[5]