Born in Melilla, Munir played youth football with CG Goyu-Ryu and AD Ceuta,[3] and made his debut as a senior with the latter's reserves in the regional leagues.

[6] Munir joined UD Melilla in summer 2009, initially being assigned to the reserves and being definitely promoted to the main squad in the Segunda División B the following year.

[8] On 10 September he made his professional debut, starting in a 1–1 away draw against CD Leganés in the second round of the Copa del Rey and also saving two penalties during the shootout.

On 9 March 2015, he was called up by manager Ezzaki Badou for a friendly against Uruguay to be held late in the month,[17] and made his debut by starting in the 1–0 loss.

[24][25] After starter Bounou fell ill shortly before the start of the group-stage fixture against Belgium in the latter tournament, he replaced him and eventually contributed to a 2–0 win in Doha;[26] he and his teammates were part of the first African nation ever to reach the semi-finals of the competition.