Born in Nova Erechim, Santa Catarina, Ronaldo was a Paraná Clube youth graduate, but after failing to make his breakthrough, he moved to Corinthians Alagoano in 2011.

The following year, he joined CSA, and made his debut for the club on 24 June 2012 by starting and scoring a brace in a 3–1 home win against Vitória da Conquista.

[3] Ronaldo made his professional debut on 22 September 2012, coming on as a half-time substitute and scoring his team's first in a 3–2 away loss against São Caetano.

[9] Ronaldo made his debut in the main category of Brazilian football on 17 August 2014, replacing Serginho in a 2–0 away loss against Grêmio.

[14] Ronaldo made his debut for Peixe on 6 February 2016, coming on as a second-half substitute and suffering a late penalty in a 2–1 home win against Ituano.