IFK Norrköping had a transfer bid rejected before Häcken accepted an offer from US Lecce.
[1] While at Lecce, Hasic sat on the bench three times in the 2021-22 Serie B as well as one 2021-22 Coppa Italia match.
[3] After his contract with Lecce expired, Hasic returned to Sweden and signed for Allsvenskan team IFK Värnamo.
[5][6] Hasic knew NK Osijek's new manager Federico Coppitelli from their mutual time in Lecce.
It did not take long before Hasic was among the NK Osijek players with the most minutes in the 2024–25 Croatian Football League.