Porto On 17 July 2018, Mouandilmadji signed a four-year contract with
Porto. Despite initial media reports stating that the youngster would play for the
reserve side, manager
Sérgio Conceição integrated him with the pre-season main squad. Mouandilmadji made his professional debut for the
Primeira Liga title holders on 11 August as an 81st-minute substitute for fellow
Coton Sport graduate
Vincent Aboubakar, and scored the final goal of a 5–0 home win over
Chaves. He then dropped down to the second team in
LigaPro, and scored both of their goals of a 2–1 win over
Cova da Piedade on 11 November. On 9 January 2020, Mouandilmadji was loaned to last-placed
Aves for the rest of the top-flight season. After their relegation, he was named in Porto's first-team squad for 2020–21. He rescinded his contract by mutual consent in January 2021, with 18 months remaining.
Seraing After being a free agent for six months, Mouandilmadji signed a two-year contract with
Belgian Pro League club
Seraing in July 2021.
Samsunspor On 7 July 2023, recently-promoted
Süper Lig side
Samsunspor announced the signing of Mouandilmadji on a three-year contract. ==International career==