Nemanja “nexa” Isaković entered the world of professional Counter-Strike in 2015. In the beginning, he played for a number of lesser-known mixes, where he didn’t show any remarkable results. However, in 2016, the esports player moved to iNation and won the Balkan Pro League. In April 2017, he was invited to Renegades, with which he managed to win the Asia Minor Championship - Kraków 2017 and reach the semifinals of DreamHack Open Atlanta 2017.
In November of the same year, Nemanja signed a contract with MANS NOT HOT and became the runner-up at Geeks Gone Wild #23. After that, he played for The Imperial, where he won titles at Copenhagen Games 2018 and DreamHack Open Summer 2018. In November, he joined Valiance and conquered the United Masters League Season 1.
From June to September 2020, Nemanja “nexa” Isaković played for CR4ZY. With the team, he won silver at the Europe Minor Championship - Berlin 2019 and Arctic Invitational 2019, before moving to G2 Esports, where he achieved the most significant successes of his esports career. With the team, he became the champion at Champions Cup 2019, Battle of Betway #2, won silver at cs_summit 5, Intel Extreme Masters XIV - World Championship, ESL One: Road to Rio - Europe, DreamHack Masters Spring 2020: Europe, Intel Extreme Masters XVI - Cologne, PGL Major Stockholm 2021, and placed 1st-3rd at BLAST Premier: Spring 2020 Regular Season and BLAST Premier: Fall 2020 Regular Season, as well as 1st-2nd at BLAST Premier: Spring Showdown 2021.
In February 2022, the player signed with OG, where he played until November 2023. During this time, he won gold at the Teleperformance PXP Invitational, silver at SteelSeries Nova Invitational, and placed 1st-3rd in BLAST Premier: Spring Groups 2022 and BLAST Premier: Fall Groups 2022.
In December 2023, Nemanja returned to G2 Esports, where he spent just over six months, managing to win the Intel Extreme Masters Dallas 2024 tournament, as well as finish 1st-2nd at PGL Major Copenhagen 2024: European RMR A, and 3rd-4th at PGL Major Copenhagen 2024 and Intel Extreme Masters Chengdu 2024.
From July to September 2024, the esports player was with BLEED Esports, but during this time, he couldn’t boast any major achievements. As a result, the player went inactive, and in February 2025, he signed with BC.Game Esports, where he currently plays. With this team, he managed to take 2nd place at CCT Season 2 European Series #18 and win gold at CCT Season 2 European Series #19. Additionally, Nemanja “nexa” Isaković participated in the qualifier for PGL Bucharest 2025, but the team failed to qualify, finishing in 25th-32nd place.