 He signed his first professional contract with them on 2 December 2015.He made his professional debut for Feyenoord in a 2–1 UEFA Champions League win against Napoli on 6 December 2017, wherein he played the full 90 minutes.Malacia made his Eredivisie debut for Feyenoord in a 1–1 tie with SC Heerenveen on 13 December 2017.