After playing for the Juvenil side of CF Rayo Majadahonda, Alhassane made his senior debut with farm team CD Paracuellos Antamira in 2020.
[3] On 1 September 2021, he was loaned to Segunda División RFEF side Gimnástica Segoviana CF for one year.
[4][3] After featuring sparingly, Alhassane returned to the Majariegos in July 2022, being included in the main squad in Primera Federación.
He terminated his contract with the club in the following year, and signed a two-year deal with fellow third division side Recreativo de Huelva on 4 August 2023.
[6] He made his professional debut on 17 August, starting in a 1–0 away win over Deportivo de La Coruña.