Mezue ahịrịokwu na-esonụ: N'egwuregwu Olimpik nke 2012 e mere na Lọndọn, Oliveira so n'otu egwuregwu ndị mmadụ na-agba n'ụbọchị abụọ. O nwetara FINA B-ụkpụrụ nke 1:59.72 (200 m backstroke) site na
European Championships na Debrecen, Hungary, na 1:58.50 (200 m butterfly) site na Summer Universiade na Shenzhen, China. N'ihe omume mbụ ya, 200 m butterfly, Oliveira tinyere iri abụọ na abụọ n'ụtụtụ ụtụtụ. O jiri ike gafee ebe niile iji bute ụzọ n'ọkwa nke abụọ n'ime oge kachasị mma nke 1: 58.45. Mgbe ụbọchị abụọ gachara, na 200 m azụ, Oliveira gbara ndị ọzọ na-egwu mmiri asaa n'otu okpomọkụ ahụ, gụnyere Gábor Balog nke Hungary, onye ikpeazụ na European Championship. O setịpụrụ ihe ndekọ ọhụrụ nke Portuguese nke 1: 58.83 iji nweta ọnọdụ nke abụọ n'azụ Balog. Oliveira agbagharala ọkara 16 kachasị elu site na nkeji iri nke abụọ (0.60), ebe ọ bụ na ọ nọ na nke iri abụọ na prelims.