On 13 April 2017, Poletto signed with Grêmio.[3] He made his first team debut on 19 November, replacing Dionathã in a 1–0 defeat against Santos FC in Série A.[4] 7 days later, he scored the equaliser in a 1–1 draw against Atlético Goianiense from a Rafael Thyere.[5] On 5 January 2018, Poletto's contract was extended till June.[6] On 12 July, he was released by the club.[7]
On 15 September 2018, Poletto moved abroad and joined Greek Football League club Apollon Larissa.[8] On 22 November 2018, he scored his first goal for the club in an astonishing 4–3 away win against Iraklis.[9] Three days later he scored with a beautiful finesse shot in a 2–0 home win against Aittitos Spata, which cemented his team's position on top of the league table.[10] On 19 January 2019, he scored the equalizer in a 1–1 home draw against Volos.[11]