[2] In 2018, Oliveira competed in the Summer Youth Olympics held in Buenos Aires, Argentina, where he won a bronze medal in the boys' flyweight division.

[3] Due to the COVID-19 pandemic, international boxing events were halted, preventing Oliveira from earning world ranking points and ultimately disqualifying him from the 2020 Olympic Games.

[4] At the 2021 AIBA World Boxing Championships in Belgrade, Serbia, Oliveira won two bouts but was eliminated in the round of 16 by Jahmal Harvey in the featherweight category.

[5] In 2022, Oliveira claimed the gold medal in the featherweight division at the Boxing Continental of the Americas in Guayaquil, Ecuador, defeating world champion Jahmal Harvey in the final.

[7] At the 2023 IBA Men's World Boxing Championships in Tashkent, Uzbekistan, Oliveira won his first fight but was eliminated in the round of 16 by Asror Vohidov in the featherweight category.