Argentinos Juniors Prior to signing for
Argentinos Juniors in 2011, Miljevic had a short stint with the
Boca Juniors academy. The
2018–19 campaign saw the midfielder appear in senior football, firstly as an unused substitute for league fixtures with
Tigre and
Huracán in November/December 2018. Miljevic was named as a substitute for a
Copa de la Superliga round of sixteen match against
San Lorenzo in the succeeding April, subsequently making his professional bow in a 1–0 first leg win at the
Estadio Diego Armando Maradona. He made his club debut on September 22, starting and scoring his side's first in a 3–1 away win over
HFX Wanderers FC for the
Canadian Championship. On September 13, 2023, it was reported that Miljevic, against the terms of his contract with
CF Montréal, played three matches in the indoor amateur Québec Calcetto Soccer League, using the false name Matko Milojevic, where he tallied six goals and two assists. Additionally, while spectating a match in the league, he was also alleged to have spat on and struck a player in the face, resulting in his ejection from the soccer centre where the game was being played and lifetime suspension from the league. On September 18, 2023, MLS terminated Miljevic's contract for engaging in conduct detrimental to the league and violating his Standard Player Agreement.
Newell's Old Boys On February 6, 2024, Miljevic returned to Argentina for a second time, signing with
Primera División club
Newell's Old Boys. He left Newell's Old Boys on January 1, 2025.
Huracán On January 11, 2025, Miljevic was announced at
Huracán on a three-year deal, after the club bought 50% of his economic rights. ==International career==