On 15 August 2018, in a 0–1 loss against Široki Brijeg, Isaković made his 100th appearance for Mladost, a club record.[5] On 22 May 2019, he was named the Mladost Doboj Kakanj player of the 2018–19 season by the club supporters.[6]
On 18 June 2020, Isaković left Mladost over five years after joining the club, with his contract expiring.[7]
VIS Simm-Bau
On 3 July 2020, Isaković signed a contract with newly promoted First League of FBiH club Vis Simm-Bau.[8] He made his official debut for Vis Simm-Bau on 8 August 2020 in a league win against Budućnost Banovići.[9] Isaković scored his first goal for the club in a league match against Slaven Živinice on 22 August 2020.[10]