Born in
Łódź, Smolarek grew up in the Netherlands, where his father,
Włodzimierz Smolarek, played in the
Eredivisie and later worked as a coach. Smolarek went through the
Feyenoord youth system and made it all the way to the first team. On 24 August 2007, Smolarek signed with
Racing de Santander for a reported €4.8 million. On 29 August 2008, Racing loaned Smolarek to
Bolton Wanderers for the season, with a view to signing him permanently. Smolarek's debut for his new club came as the team lost 3–1 to
Arsenal on 20 September 2008. On 3 January 2009, Smolarek scored his first, and only, goal for Bolton in the FA Cup 3rd Round match away to
Sunderland Smolarek signed on 14 December 2009 with
Kavala until 30 June 2012. On 25 July 2010, he and the club agreed to cancel his contract by mutual consent. On 29 July 2011, Smolarek agreed to cancel his contract with Polonia due to his financial expectations. Smolarek also played for
Ekstraklasa side
Jagiellonia Białystok. ==International career==