Kolak won bronze medals at both the European and World Junior Championships. She qualified for the 2016 Summer Olympics, where she won the gold medal, setting a new national record of 66.18 metres. She has since bested her own record, with a 68.43 m throw in 2017. She also won the 2017 European U23 Championship and placed fourth in the final at the 2017 World Championships in London.