In 2015 Fabijański graduated from Aleksander Zelwerowicz National Academy of Dramatic Art in Warsaw with a MA degree in Acting.

[1] In 2014 he won an award for the Professional Acting Debut at the 39th Polish Film Festival in Gdynia for his roles in films Jeziorak (English title Waterline) and 'Miasto 44 (english title Warsaw 44).

[1][2][3] In 2015 he won an Andrzej Konic Award for Acting Debut at the 29th Tarnów Film Awards for his roles in films 'Waterline (original title Jeziorak) and Warsaw 44 (original title Miasto 44).

His breakthrough roles came in 2016 when he starred as Adrian Kuś in a popular TV series Belfer and as Remigiusz Puchalski vel.

In 2019 he played lead roles in Birds Talk (Mowa Ptaków), a film adaptation of the last script written by Andrzej Żuławski and film Legions (Legiony), a historical epic drama set during Great War.