Nancy El Aynaoui joined the youth academy of
Nancy when he was 8, and signed his first professional contract with the club on 3 June 2021. He made his professional debut with Nancy in a 4–0
Ligue 2 loss to
Toulouse on 31 July 2021.
Lens On 29 June 2023, El Aynaoui signed for
Ligue 1 club
Lens on a four-year contract. He scored his first goal on 28 October 2023 against
FC Nantes.
Roma On 20 July 2025, El Aynaoui moved to
Roma in Italy on a five-year contract. He made his debut for the club against
Bologna on matchday 1 of the
Serie A, by coming off the bench in the 60th minute in place of
El Shaarawy. He scored his first goal for Roma in a
Europa League match against
Midtjylland on 27 November 2025. ==International career==