After six years, Walke moved to Baden-Württemberg in 2005 from Werder Bremen to join SC Freiburg.

In 2010, Walke left Germany to sign for Austrian Bundesliga champion FC Red Bull Salzburg.

Bundesliga he returned to Salzburg for the 2011–12 season taking over the number 1 position from Eddie Gustafsson.

[4] He retired in 2023 as a legend of Red Bull Salzburg, and will stay on as a youth goalkeeping coach.

[5] He competed for Germany at the FIFA World Youth Championship 2003, but tested positive for tetrahydrocannabinol, the active chemical in marijuana.