He is a Polish rapper and music producer from Katowice and one of the hip-hop pioneers in Poland.
He co-founded the group Kaliber 44, with whom he recorded four studio albums between 1996 and 2016 (three of which achieved gold and platinum status). Since 2002, he has pursued a solo career, releasing six solo albums. He is also a co-creator of the project ARK (AbradAb, Rahim, Kleszcz) and a vocalist and lyricist for the group KA$HELL. He is a recipient of the Fryderyk Award, a prestigious Polish music industry award. He has performed at the Męskie Granie concerts alongside artists such as Wojciech Waglewski, Tomasz Stańko, Leszek Możdżer, and Maciej Maleńczuk. He has played hundreds of shows in Poland, the USA, and Europe.