He plays primarily as a Midfield. His preferred foot is Left. His current market value is estimated at 1.5M .

His most recent move was a Free from Arka Gdynia to SK Slavia Praha on 2026-06-30. The reported fee was 1M €.

Across 4 appearances in the PKO Bank Polski EKSTRAKLASA 2025-2026, Oskar Kubiak registered 1 goals and 0 assists, while completing 1 key passes out of 57 total passes with a passing accuracy of 10.