Douglas featured regularly for the club in 2013, but faced fierce competition with new signing Paulo Miranda.

[13][14] After being an unused substitute in Barça's 1–0 home win against APOEL for the season's UEFA Champions League, Douglas made his debut on 24 September, starting and being booked in a 0–0 draw at Málaga.

[15] He was later criticized for his performance, and was demoted to third-choice right back behind Dani Alves and Martín Montoya, only being limited to appear in Copa del Rey.

[16] On 26 August 2016, Barcelona and Sporting de Gijón reached an agreement for the season-long loan of Douglas.

[17] He made his debut for the Asturians on 17 September in a 5–0 loss at Atlético Madrid, and scored his first goal in Spanish football on 4 December in a 3–1 win against Osasuna at El Molinón.

Douglas was a member of the Brazil national under-20 team, appearing in the 2009 South American U-20 Championship and 2009 FIFA U-20 World Cup.