Campillo has first worked as an editor and then as co-author in some of Cantet films, like the Palm d’Or winner Entre le Murs (The Class, 2008). He made his debut in directing in 2004 with the art-house zombie drama Les Revenants (They Came Back). Eastern Boys is his second feature-length film and has been participated in the Orizzonti section of the 70th Venice Film Festival.