He previously represented Sweden at youth and full international level before making his debut for the Kosovo national team in 2016.

[3] In January 2007 Fejzullahu returned to Sweden to sign with Mjällby AIF, who played in the second tier Superettan at that time and therefore was the highest level club near his hometown.

In his second year he found playing time harder to come by and was loaned out for a short period to Danish club Randers FC.

[8] He stayed with Mjällby for the first half of the following season too and there he finally started showing improved form, scoring six goals in 15 games.

Fejzullahu made his debut for the senior team and scoring the equalizing goal in a 1–1 draw against North Korea in the King's Cup.

[16] On 7 October 2015, Fejzullahu received a call-up from Kosovo for the friendly match against Equatorial Guinea[17] and made his debut after being named in the starting line-up.