He was the most promising goalkeeper in Bosnia and Herzegovina, he played for youth selections and was later transferred to Austrian side Vorwärts Steyr.
Here he found good form and even became first choice goalkeeper for the Bosnia and Herzegovina national team.
Hasagić made his debut for Bosnia and Herzegovina in a September 2002 European Championship qualification match against Romania and has earned a total of 44 caps, scoring no goals.
[3] In August 2017, Hasagić became the new goalkeeping coach of Bosnian Premier League club Mladost Doboj Kakanj.
[4] Two years later, on 2 November 2019, he announced that he left Mladost and that he will only be focusing on the Bosnia and Herzegovina national team.
[7] It was announced on 7 January 2020 that Hasagić took over the position of goalkeeping coach of another Bosnian Premier League club, Tuzla City, working alongside former national team teammate and godfather Elvir Baljić, the club manager at the time.