He made his professional debut and start for Le Havre on 3 March 2008 in a Ligue 2 match against Troyes, playing 72 minutes before being substituted.

The Comoros international suffered a serious cruciate ligament injury in May[8] and was surplus to requirements for Olympiacos manager Marco Silva.

[9] On 29 December 2015, since he did not manage to earn a single appearance with the club, he signed a six-month contract with Levadiakos until the end of 2015–16 season.

On 26 July 2017, after his loan at Panionios expired, Ben scored a brace for Olympiacos in a 3–1 victory against Partizan in the first leg of the UEFA Champions League third qualifying round.

[15] On 19 December 2017, the Comorian international striker was dropped from the Olympiacos first-team squad after deciding not to extend his contract.

[21] On 16 January 2023, Ben officially joined Cypriot side APOEL on a permanent deal, signing a contract until May 2025 with the club.

[23] Subsequently sidelined with a serious injury with his club, he returned to action to help his national team reach the qualifying competition of a major international tournament for the first time in their history, a goal they have been pursuing since 2007.

On 24 March 2016, it was Ben who scored the only goal of the Africa Cup of Nations preliminary qualifying round match against Botswana, his country's first-ever win in a competitive international.

[24] In January 2022, Ben was selected to the Comoros squad at the 2021 Africa Cup of Nations, the country's first ever appearance in a major tournament.