Joelinton helped Newcastle finish fourth and qualify for next season's UEFA Champions League.
Newcastle lost 2-0 to Arsenal in the final weeks of the campaign and Joelinton says he bore the brunt of some disgruntled fans after the game.
The 26-year-old is currently away on international duty with Brazil and is set to win his first caps in upcoming friendly matches against Guinea and Senegal.
“It’s an important moment to speak about racism,” Joelinton told a press conference. “We have been talking about it for a long time.
“Still, many things need to be changed. We talk about a combat against racism but we didn’t have much of a change.
“This (racism) is not something happening now, but for a long time.
“And, in the 21st century, we still see things like that. It’s hard to accept and believe that we are evolving when things like that still happen.”
Asked if he had suffered racist abuse, the player replied: “Not on the pitch, no.
“But after that match against Arsenal playing at home, I have received some messages with racist insults. But it’s gone, it didn’t affect me.”
Joelinton scored six goals and provided two assists in 32 Premier League games for Newcastle last season.