Demir took the bronze medal in the 65 kg event at the 2018 European Juniors Wrestling Championships held in Rome, Italy defeating Hungarian Noémi Szabados by 5–3.

[5] At the 2021 U23 World Wrestling Championships in Belgrade, Serbia, she became bronze medalist in the 65 kg event defeating Italian Elena Esposito by 3–2 in the repechage match.

[6] At the 2022 European U23 Wrestling Championships in Plovdiv, Bulgaria, she won the silver medal in the 68 kg event after losing to Irina Rîngaci from Moldova in the final.

[6][7] At the 2022 European Wrestling Championships in Budapest, Hungary, she lost the quarter-finals match in the 68 kg event to Natalia Strzałka from Poland by 6–13.

[8] She took the bronze medal defeating Oguljan Egemberdiyeva from Turkmenistan by 10–0 in the 68 kg event at the 2021 Islamic Solidarity Games in Konya, Turkey.