Alampasu began his career in
Nigeria, playing in the Lagos State Football Association Future Stars Academy and for Abuja Football College. Alampasu underwent trials with
Real Oviedo,
Genk and
Braga before signing for Portuguese club
Estoril in February 2015. Alampasu cancelled his contract with Estoril, due to visa problems, and subsequently signed for
Feirense. In August 2016, Alampasu signed for
Cesarense on loan. On 20 January 2019, Alampasu made his debut for Feirense in a 0–0 draw against
Rio Ave. In February 2020, Alampasu signed for Latvian club
Ventspils. ==International career==