Date of birth
Jamie is currently on loan with City until the end of the season from Scottish Premier League club Hearts.
Walker is an experienced operator with nearly 300 career appearances to his name up to this point.
He made his first appearance for the Bantams in their 2-1 win over Salford City on January 15.
The forward has spent the majority of his career in Scotland across two spells with Hearts and a loan spell at Raith Rovers.
The 28-year-old also had a permanent spell at Wigan Athletic and a loan spell at Peterborough United.
Throughout his career, Walker has won the Scottish Championship on two occasions with Hearts and the Sky Bet League One title with Wigan.