 Cardoni is the son of Furio Cardoni, one of Luxembourg's finest players in the 1970s.A tireless midfield playmaker, Cardoni started his career at US Rumelange before joining Luxembourg club Jeunesse Esch in 1992.He was then snapped up by Bundesliga side Bayer Leverkusen, for whom he made only one substitute appearance (against Bayern Munich) in two seasons.