On 24 July 2014, Sampaio travelled to Portugal to go on a tryout at Boavista, that proved successful, with the 19-year-old signing for three seasons.[1][2] He made his professional debut against S.L. Benfica at 24 August 2014.[3]
On 2 July 2017, Sampaio signed a four-year contract with Akhmat Grozny.[4] He was released by Akhmat on 3 July 2018.[5]
On 21 August 2018, he returned to Portugal, signing with Feirense.[6] A year later, he moved to C.D. Tondela on a two-year deal.[7]