Born in Kassel, Germany, in 1972, he grew up in Zurich, Switzerland. Studied film and psychology and worked as a journalist, editor, cultural organizer and musician. Before his debut as a director, he wrote several screenplays. Directed the short film Herr Goldstein (2005), winner of the Golden Leopard award at the Locarno Film Festival. Mostra presented his features The Friend (2008) and A Decent Man (2015).