Her identical twin sister Iris is also a swimmer. The twins were born to German father Peter Rosenberger and Turkish mother Leyla Aktaş-Rosenberger, a painter, ceramic artist and sculptor, in Traunstein, Germany.[4] They have a younger sister Deniz, who is also a swimmer. Jasmin studied law at the Ludwig Maximilian University of Munich.[5][6][7][8]
Jasmin is the holder of Turkish national records of 200 m butterfly at short course with 2:10.60 set in 2009 and at long course with 2:14.26 set in 2012. She was the member of the Turkish team, which set a new national record at short course in 4×50 m medley relay with 1:53.48.