Mandanda is a youth product of
Caen, though he was never offered a spot in the club's first team. After making his debut in the French lower divisions on loans, Mandanda joined
Ajaccio in 2015, as a backup for
Anthony Scribe. He made his full professional debut a few months later, in a 3–0
Ligue 2 defeat against
Nancy. In February 2020, Mandanda joined
Rennes on a contract until the end of the 2019–20 season. He left the club at the expiration of his contract in summer 2020. On 7 September 2020, Mandanda signed with Norwegian club
Kongsvinger IL that plays in the second tier
1. divisjon. In July 2021, he joined
Créteil in the
Championnat National. ==International career==