Career
Club Jež began playing football at his local club Football Club Nitra. He made his first team debut in the 1999–2000 season but next season he moved to Gambrinus liga club Viktoria Plzeň. He spent in Viktoria five seasons besides half-year loan for Marila Příbram in autumn 2004.
He became a club captain after Zdeno Štrba"s transfer to Xanthi in July 2009.
He qualified with Žilina to the 2010-2011 Union of European Football Associations Champions League and played all 6 group games. In February 2011, he joined Polish Ekstraklasa club Górnik Zabrze.
After 14 matches and 5 goals for Górnik he signed a 3-year contract for Polonia Warsaw in June 2011. International Róbert"s international debut came in second half of the Slovakia versus
Croatia match on 16 October 2007.
He scored his first international goal against Liechtenstein on 19 November 2008. International goals Žilina.