[citation needed] In 2008 Stojanović made three podium finishes on European junior cups and was later recognized by ITU Sport Development and participated on Australian Youth Olympic Festival in Sydney in January 2009 where he finished 13th as an individual and 4th in relays with ITU team.

In 2011 he won Pan American continental cup in Cartagena, Colombia, and took third at the ITU World Aquathlon Championships in Auckland in 2012.

In 2014 Stojanović won both duathlon and triathlon ITU Balkan Championships and also qualified for the 2015 European Games in Baku, Azerbaijan.

2016 saw him taking a silver medal at the ITU Asian Cup Taizhou in China, and a win at the ETU Balkan Championships in Olimp, Romania, which was his 8th title.

In Taizhou in China on ITU Asian Cup he took bronze medal, and also won the national 10 km road race in Kula, Serbia.