Fischer has been playing for TSV Hannover-Burgdorf since the C-youth team.

In the 2020–21 Bundesliga season, he made his debut in the German top flight.

[1] With the German U-17 national team, Fischer won the silver medal at the 2019 European Youth Olympic Festival in Azerbaijan.

[1] The team won the title at the 2023 U-21 World Championship in Germany and Greece.

He made his debut for the national team on 27 April 2023 in the 23–32 defeat against Sweden in Kristianstad.