A graduate of the club's youth academy, Douar made his professional debut on 12 May 2018, playing the entirety of a 5–0 victory over Olympique de Médéa.[2]
In August 2021, following a match against CR Belouizdad, Douar received a four-game suspension and a 40,000 dinar fine for insulting a match official.[3]
International
Douar has represented Algeria at several youth levels, including U20, U21,[4] and U23.[5]