[1] Beginning his career with IFK Värnamo in 2008, he went on to represent IF Elfsborg, Nice, Panathinaikos, AEK Athens, and Hannover 96 before returning to Swedish football in 2022.

In May 2014 Niklas Hult was signed by OGC Nice for a fee around €1 million, the French Ligue 1 club as they looked to strengthen for the 2014–15 season.

[3][4] During the summer of 2017, the Swedish international rejected a suggestion from Standard Liège, and at the same time he filed an appeal claiming his late payment from Panathinaikos.

Later in the summer, the player's side claimed that the international left-back could leave as free from the club, either for Konyaspor or Standard Liège that was once again interested in his acquisition.

[8] In the 2019–20 season Hult competed in 18 matches for AEK across all competitions, with the 30-year-old Swedish having previously won the Super League two years ago after transferring from Panathinaikos in January 2018.