Birmančević signed his first professional contract with Partizan on 12 February 2016, and got the jersey number 30.[2] He made his Serbian SuperLiga debut on 21 February 2016 in a match against OFK Beograd.[3] Later, during the spring half-season, coach Ivan Tomić used him as a back-up player in matches against Radnik Surdulica[4] and Vojvodina.[5] In summer 2016, Birmančević was loaned to Teleoptik,[6] where he scored 4 goals on 22 matches in the Serbian League Belgrade for the 2016–17 season. He also extended his loan to Teleoptik for the 2017–18 Serbian First League campaign. He was sold from Malmö FF to Toulouse for a sum around €5 million.[7]
Sparta Prague
In June 2023, Birmančević was loaned to Sparta Prague for one season with an option to buy.[8] He signed for the club permanently on 5 March 2024, official from 1 July.[9]
In May 2024, Birmančević helped the club to win its second championship title in two seasons[10] and domestic cup.[11] He was awarded as the player,[12] midfielder[13] and foreign player[12] of the 2023–24 season by the League Football Association.
International career
Birmančević was called in U18 national during the 2015,[14] and scored one goal in a friendly match against Poland.[15] In August 2016, he was called into the Serbia U19 squad for the memorial tournament "Stevan Vilotić - Ćele".[16] Birmančević scored his first goal for Serbia U19 in a match against Sweden, played on 14 November 2016.[17]
On 28 May 2024, Birmančević was named in the Serbia squad for UEFA Euro 2024.[21] He appeared as a substitute for Andrija Živković in the team's opening match of the tournament against England, making his first competitive appearance for Serbia in the 1–0 loss.[22] He also played in group stage match against Slovenia. Serbia finished fourth in the group.
^"Veljko Birmančević". International Sports Office Belgrade official website (in Serbian). 21 February 2016. Archived from the original on 6 February 2020. Retrieved 21 February 2016.