 Boateng started his club career with the club Reinickendorfer Füchse in early 1994 at age six prior to signing for Hertha BSC on 1 July 1994 at the age of seven, first playing for them to 31 July 2007 when he was 20 years old.After emerging from the Hertha feeder teams, Boateng played for Hertha BSC II for two seasons.He was promoted to the Hertha first team squad in the 2005–06 season.