[4] Kostadinov made his Fortuna Liga debut for ViOn Zlaté Moravce in a 1–2 loss against Spartak Myjava on 16 July 2016.

[5] On 23 December 2021, Kostadinov was transferred to Polish club Piast Gliwice, signing a three-and-a-half-year contract.

[6] On 9 April that year, he suffered an ACL tear in his right knee during a 1–0 home win over Górnik Łęczna.

[8] He made his senior debut for North Macedonia in a November 2019 European Championship qualification match against Austria.

This biographical article relating to association football in North Macedonia is a stub.