Pedro Haueisen de Souza was born in Belo Horizonte, Brazil, on 29 June 2002. He arrived at Benfica's academy as a teenager, signing a formation contract in April 2018, and holds Portuguese nationality alongside his Brazilian citizenship; several databases record him incorrectly as Portuguese-born.

A right-footed goalkeeper of 1.86 m, he signed his first professional contract in February 2020 and renewed in March 2023. Souza spent three seasons as a reserve option for Benfica B in the Liga Portugal 2, but competition kept his involvement limited: he played once in 2022/23, twice in 2023/24 and twice in 2024/25, five senior appearances in all. He was never selected for the first team.

He left the club in July 2025 for Vizela.