Career
He is the current manager of the Swedish team Olympiacos Stockholm Football Club. Born in Skellefteå, Stefanidis started his career at youth level at IF Brommapojkarna and has also represented the Greek team Iraklis. He moved back to Sweden in 2005 in order to join. On 23 July 2007, it was announced that Stefanidis had signed for Helsingborgs" rivals Malmö FF, a contract starting on 1 January 2008.
However, fans of were greatly upset and subsequent harassment and personal persecution led to Stefanidis" changing clubs prematurely, on 2 August 2007.
The disappointment came from the fact that Stefanidis refused to sign a new contract with Helsingborg and thereafter switched to the main rivals. On 27 July 2009, Stefanidis moved on loan from Malmö FF to Landskrona BoIS, in exchange for Ivo Pekalski who moved from Landskrona to Malmö.
In the Winter 2009, Stefanidis moved back to play for his childhood club IF Brommapojkarna. In February 2012, Stefanidis joined Akropolis IF in the Division 1 Norra.