Youth career Mem was a late starter, learning how to play at the age of 13. He began his career with French club
CSM Eaubonne, where he played until he was 15 years old. The following two seasons he was at Pôle Espoirs before one season at Saint Gratien, where he made his senior debut in the French third tier at the age of 16. A week before his 17th birthday he won U-18 European Championship, and a year later he won the U17 World Championship.
Senior debut He made the jump to the handball elite at the age of 17 and in the 2015–16 season he made his debut with Tremblay. In his first season in the LNH, Mem scored 93 goals in 25 games.
Fc Barcelona In 2016 Mem signed with Spanish champions FC Barcelona on a six year deal. This makes him the youngest first team player, FC Barcelona has ever signed. There, he has won the
Liga ASOBAL,
Copa ASOBAL and
Copa del Rey de Balonmano treble for seven consecutive seasons. In his second season he was named as best young player in the world by Handball Planet. Already in 2018 he extended his contract to 2024. In 2019 won the
IHF Super Globe, beating German club
THW Kiel 34:32 in the final. In May 2022 he extended his contract until 2027. A month later he won the
2021–22 EHF Champions League beating Polish
Vive Kielce on penalties. Mem was in the Champions League all star team for the tournament. From the 2023/24 season he became the team captain of Barcelona. The same season he was named best right back in the world at the 2024
EHF Excellence Awards.
National team At the age of 19 he was on the France squad at the
2017 World Men's Handball Championship, that won a gold medal. He won an additional gold medal with the French national team at the
2020 Olympics. In 2024 he completed the set when he won a gold medal at the
2024 European Championship. At the
2025 World Championship he won bronze medals with France, losing to Croatia in the semifinal and beating Portugal in the third place playoff. ==Personal life==