Stefan holds the junior age group record for 50 and 100 meters in freestyle swimming. As a national team athlete, he has already represented his country in international competitions in Belgrade and Greece, achieving outstanding results. At the biennial European Youth Olympic Festival, in 2023, in Maribor, Slovenia, Stefan finished as one of the best in his country.

In addition to his studies and sports career, as a green ambassador of Climate Action, he will promote the closest possible partnership between sports and sustainability.