Tyrell Robinson has signed a new two-and-a-half-year contract with Bradford.
The 20-year-old left-sided player, who can play in defence or midfield and came through the Arsenal youth system, agreed a one-year deal in the summer.
Robinson, who has scored two goals in 14 games this season, said: “I know I still have things to learn, especially in the left-back position.”
Meanwhile, 24-year-old goalkeeper Lukas Raeder has signed a deal to keep him at the club until the end of the season.
Raeder, who started his career with Bayern Munich, initially joined the club in August on a short-term deal from Portuguese side Vitoria Setubal.
The German has made only two appearances for Bradford this season, with both coming in the EPL Trophy, including a 2-1 victory over Man City Under-21s.