Born in Bauru, São Paulo, Giovanni joined Santos FC's youth setup in 2012, aged ten.
[1] After failing to agree on terms to a new contract, he left the club in May 2019, as his youth deal expired, and was subsequently linked to moves to Chelsea and AFC Ajax.
[2] On 25 February 2020, Ajax requested FIFA to intervene for the club on the transfer of Giovanni, who was at the time blocked by Santos.
[4] Giovanni made his senior debut for Jong Ajax on 30 August 2020, starting in a 4–0 away loss against Roda JC.
[12] Shortly after leaving Amazonas, Giovanni moved to Kosovo after agreeing to a deal with FC Ballkani.