From 1992 through 1999, Stefan was director and programmer of the Cinema House, the leading art house cinema in Bulgaria. In 1997 he founded Sofia International Film Festival, accredited by FIAPF.
Since 1995 he has produced and co-produced around 20 films for directors as Rangel Valchanov, Nuri Bilge Ceylan, Stephan Komandarev, Dusan Milic, Nadejda Koseva, Levan Koguashvili, Jessica Woodworth and Peter Brosens.
He was member of juries in Venice, Cannes, Karlovy Vary, Moscow, and Wiesbaden, among others. He is a member of the European Film Academy and The Festival Band.
Stefan is the director of the Warsaw Film Festival, after joining the team in the mid-80s. A graduate of Polytechnics, in the 1980s he was involved in Warsaw rock and alternative music scene as band manager and event organizer. In 1990 he became the first head of theatrical distribution of Warner Bros. films in Poland.
In 2000 he founded the Warsaw Screenings, an event promoting Polish cinema abroad. Since 2003 he is the coordinator of Alliance of Central and Eastern European Film Festivals. In 2005 he founded the CentEast Market Warsaw, specializing in films from Eastern Europe.
He is an adviser for numerous film directors, producers, and festivals, and also jury member and panelist at various film events in Europe, Asia and the Americas. He occasionally writes about film, most recently for “Psychiatra” quarterly.
Stefan studied scriptwriting and dramaturgy at The Film Academy (FAMU) in Prague. He wrote several television films and plays, as well as the feature Only a Day (1988).
In 1992 he started to work for The International Film Festival Karlovy Vary creating The Forum of Independents, an important part of the main programme. In 2007 he established Prague Short Film Festival. Since 1998 he also works for the International Film Festival Mannheim-Heidelberg, where he was in charge of Co-production Meetings and in 2012 he became the member of The Program Committee.
In 2004 he produced for two documentaries, Souvenir, directed by Alice Nellis, and The Memorial Who Wasn´t, directed by Peter Kerekes.
He wrote for several Czech film magazines and newspapers, lectured about independent cinema at Prague Film school FAMU and Masaryk University in Brno and was member of several festival juries (Warsaw, Munich, Sofia, Potsdam, Pilsen, and in 2017 main jury of the Karlovy Vary film festival).