He made his first team – and Série A – debut on 14 November 2010, starting in a 1–1 home draw against Vitória, and appeared in two further matches as his side was relegated.

[4] Douglas scored his first professional goal on 18 April 2012, netting the equalizer in a 1–1 home draw against Ceará, which qualified Paraná to the next round of the year's Copa do Brasil.

[8] The following 10 January, the club announced that he would not have his contract renewed,[9] and he subsequently joined Thai League 1 side Police Tero FC on 5 February.

[12] Over a month after joining, Douglas hit the net for the first time in a 4–1 win over Al Urooba, after the match he said "I'm so happy to have scored my first for Khor Fakkan and may it be the first of many.

"[13] On 9 August 2022, Douglas signed a two-year contract with TFF First League (Turkish second division) club Samsunspor.