With Ruch Chorzów, he played 162 matches in the Ekstraklasa scoring 66 goals. With Marx, Ruch won the national championship (1974 and 1975), and the Polish Cup (1974).
Later in his career, Marx went to France, where he played most notably for Racing Lens (2nd place in Ligue 1 in 1977). Since ending his professional soccer player's career in 1982, Marx has been coaching in France.
Joachim Marx was famed for the strength of his kick.