Born in Olinda, Pernambuco, Kaio joined Santos' under-11s in 2013.[2] In November 2017, aged only 15, he was promoted to the under-20 squad.[3]
On 21 September 2018, Kaio was promoted to the first-team by manager Cuca.[4] He made his professional – and Série A – debut nine days later, coming on as a second-half substitute for Bruno Henrique in a 1–0 home defeat of Atlético Paranaense,[5] becoming the sixth youngest to debut in Santos' history.[6]
On 11 January 2019, after lengthy negotiations, Kaio signed his first professional contract with the club, agreeing to a three-year deal.[7] He scored his first goal for Peixe on 3 March of the following year, netting his team's second in a 2–1 Copa Libertadores away win against Defensa y Justicia; it was also his debut match in the competition.[8]
Juventus
On 26 July 2021, Kaio reportedly agreed to a pre-contract with Italian side Juventus, effective as of 1 January.[9] On 2 August, Santos announced an agreement with Juventus for his immediate transfer,[2] with the Italian side paying a rumoured fee of €3 million.[10] Juventus officially announced Kaio's transfer on 17 August, signing him on a five-year contract.[11]
On 23 August, Kaio suffered a medium-grade injury to the rectus femoris.[12] On 1 September, Kaio was excluded from Juventus' 23-man squad for the UEFA Champions League group stage.[13] He played his first match since this injury (and the first one for Juventus) on 2 October, in a 1–0 away win against cross-city rivalsTorino, coming on as substitute in the 89th minute.[14]
On 20 October, Kaio played a match with Juventus U23 — the reserve team of Juventus — in a 2–2 Serie C away draw against AlbinoLeffe, where he missed a penalty and scored a goal.[15] In January 2022, Kaio refused a loan move to Sassuolo.[16] On 2 February, Juventus' coach Massimiliano Allegri did not include Kaio in the UEFA Champions League knock-out stage squad.[17] Kaio was called up by Juventus U23 again on 22 February, for a match against Pro Patria set to be played the following day,[18] where he injured his patellar tendon.[19] He ended the 2021–22 season early, having only played 125 minutes in nine matches with the first team (none as a starter).[20]
Loan to Frosinone
On 29 August 2023, Kaio joined newly promoted side Frosinone on a season-long loan.[21]
Cruzeiro
On 6 June 2024, Campeonato Brasileiro Série A club Cruzeiro announced an verbal agreement with Juventus and Kaio Jorge's staff for the transfer of the player.[22] The deal was officially confirmed five days later after the completion of the medical exams, with Kaio Jorge signing a five-year contract with the club.[23]
On 20 September 2019, Kaio was included in Guilherme Dalla Déa's 21-man list for the 2019 FIFA U-17 World Cup.[25] He scored five goals in the competition, including one in the final (a 2–1 defeat of Mexico),[26] and was awarded the Bronze Boot.[27]
Personal life
Kaio's father Jorge Ramos was also a footballer and a forward who notably represented Chaves and Gama.[28]