Raeder’s new deal will keep him at the Sky Bet League One side until the end of the season.
The 23-year-old, who started his career at Bayern Munich, has made two appearances for Bradford since joining them in August.
Cardiff remain unhappy with Derby's decision to postpone Sunday's Sky Bet Championship game at Pride Park.
Dundee United boss Csaba Laszlo has been left hoping for St Mirren to slip up in the race to seal promotion to the Ladbrokes Premiership.
Crewe will consider starting Chris Dagnall when they host Forest Green on Tuesday.