Career
Born in São Paulo Paulo, Sampaio is a youth prospect from Santos Football Club, which loaned him out in 2014 to Paulista in the Campeonato Paulista. On 24 July 2014, Sampaio travelled to Portugal to went on a tryout at Boavista, that proved successful, with the 19-year-old signing for three seasons. He made his professional debut against South.L. Benfica at 24 August 2014.