He currently plays for FC Liefering, wearing the number 39 shirt. He plays primarily as a Defender. His current market value is estimated at 1.2M €.

His most recent move was a Loan from FC Liefering to Red Bull Salzburg on 2026-06-30.

Throughout the Austrian 2.Liga 2025-2026, Douglas Mendes featured in 8 matches, averaging 1 tackles, 1.6 interceptions, and 3.1 clearances per game, while blocking 0 shots per game.