Adamczuk started his career with
Pogoń Szczecin during the 1987–88 season, before moving on to play for
Eintracht Frankfurt,
Dundee,
Udinese Calcio and
Belenenses. It was in the 1999–2000 season that he would get his big break, signing on a free transfer for Scottish champions
Rangers from Dundee. He started off as a regular in the Rangers team, making 16 appearances up to and including a
UEFA Cup tie against
Borussia Dortmund on 7 December 1999, but didn't make any further appearances that season. The following season, he made three appearances in the league across October and November 2000, however these would be his last appearances for Rangers. He had a loan spell at English club
Wigan Athletic in 2001. In 2002 it was reported that he was suffering from depression. Adamczuk retired in 2002, then returned in 2006 to play for Pogoń Szczecin Nowa. ==International career==