In the summer of 2011, Abdoun signed a three-year contract with Olympiacos, on a free transfer from Kavala, due to their relegation to the fourth division.

Abdoun is a former French youth international and was a part of the team that won the 2005 UEFA European Under-19 Football Championship, held in Northern Ireland and the 2007 Toulon Tournament.

He opted to play for Algeria at senior level in September 2009, taking advantage of FIFA's new ruling, allowing him to change his national allegiance despite being older than 21 years of age.

His parents are originally from the villages of Tifrit and Biziou in the commune of Akbou, Béjaïa, in the Petite Kabylie region of Algeria.

[6] He returned to Ajaccio at the end of the season after Manchester City chose not to take up the option of making his move permanent.

[10] On 31 August 2011, Abdoun signed a three-year contract with Olympiacos, joining them on a free transfer from Kavala after they were relegated to the fourth division.

Abdoun managed to score his first goal in the UEFA Champions League, in a 2–1 home loss against German side Schalke 04.

Abdoun was insistent he was taking the penalty, even arguing with his fellow team-mates on the pitch, and his persistence paid off as he scored with an audacious chip from the spot.

[15] On 20 July 2015, Abdoun was approached by the Superleague side, Veria and her president, Theodoros Karipidis, in order to sign a contract for the club.

[19] Abdoun debuted on 23 August 2015 where he assisted Veria's equalizing goal on 1–1 home draw on season premiere against PAS Giannina with a free kick.

On 15 September 2009, he was selected for the first time by head coach Rabah Saâdane to join the ranks of the Algeria national football team for a qualifier against Rwanda.