Career
Metaj started to play football with amateur club VV Froombosch, before being scouted by Dutch top flight club Football Club Groningen, who then signed him and entered him into their youth system. Metaj also represented occasionally the Netherlands as several youth levels, including Netherlands U16, Netherlands U17 and Netherlands U21. Just before the 2007-2008 Eredivisie season started, he was asked to join Football Club Groningen"s senior squad.
On September 2, 2007, Metaj made his professional debut in an away game against AFC Ajax, and later signed a contract due to expire in 2012.
Metaj spent the 2009-2010 season on loan to newly promoted Eredivisie side RKC Waalwijk, with the aim for the youngster to make more first team experience. In the next season he again played few matches for Football Club Groningen, so he left on loan to Football Club Emmen.
In the summer of 2012 he finally left Football Club Groningen and signed with Football Club Emmen. Metaj signed a two-year contract with Albanian Superliga side Vlorë as a free agent on 29 July 2014.