Born in Bom Sucesso, Minas Gerais, Igor joined Red Bull Brasil's youth setup from Portuguesa Santista.

[2] Igor made his professional debut for Liefering on 22 July 2016, starting in a 1–0 Austrian First League home win against SV Horn.

[3] After being a regular starter, he made his first team debut the following 28 May, playing the full 90 minutes in a 1–0 home defeat of SC Rheindorf Altach.

[8] On 26 July 2023, Premier League side Brighton & Hove Albion announced the signing of Igor on a four-year deal,[9] for a reported fee of €17 million.

[10] Igor made his Brighton debut on 8 October 2023, playing sixty-three minutes in a 2–2 home draw against Liverpool in the Premier League.