She took part at the 2015 European Games in Baku, Azerbaijan competing in the 48 kg event without gaining a medal. In 2017, Demirhan captured the silver medal at the Islamic Solidarity Games in Azerbaijan. She was also the bronze medalist in the 48 kg event at the 2017 World Wrestling Championships held in Paris, France. In 2019, she captured bronze medals at the 2019 European Games and at the 2019 European Wrestling Championships. In March 2021, she qualified at the European Qualification Tournament to compete at the 2020 Summer Olympics in Tokyo, Japan.