[8] In 2016 Mem signed with Spanish champions FC Barcelona on a six year deal.

[11][12] In 2019 won the IHF Super Globe, beating German club THW Kiel 34:32 in the final.

A month later he won the 2021–22 EHF Champions League beating Polish Vive Kielce on penalties.

At the age of 19 he was on the France squad at the 2017 World Men's Handball Championship, that won a gold medal.

In 2024 he completed the set when he won a gold medal at the 2024 Germany Two of his brothers are basketball players in the Ligue Nationale de Basket.