2011–2013 Metidji competed at the
2011 Arab Games where he helped Algeria finish third; individually he finished third in the all-around behind Egyptians
Mohamed El-Saharty and
Ashraf Mostafa. In 2012 Metidji competed at his first. senior level
African Championships, helping Algeria finish second behind Egypt.
2014–2016 At the
2014 African Championships Metidji helped Algeria place first as team. Additionally, he also won gold in the all-around ahead of
Mohamed El-Saharty and compatriot
Mohamed Bourguieg. The following year he competed at the
2015 African Games, once again helping Algeria win gold as a team. Individually he won silver on parallel bars and bronze on pommel horse. At the
2016 African Championships Metidji defended his all-around title.
2017–2019 At the
2018 African Championships Metidji helped Algeria place first as a team for the third consecutive time. However, he was unable to defend his all-around title and placed second behind
Omar Mohamed. At the
2019 African Games Metidji won the all-around competition as well as helped Algeria place first as a team.
2021–2023 Metidji competed at the
2022 Mediterranean Games and qualified to the all-around final; however, he later withdrew due to a minor injury. He next competed at the
2023 Arab Games where he helped Algeria finish first as team. Individually he won gold on rings. == Competitive history ==