Fagin  studied composition at the Conservatoire National Supérieur de Musique de Paris. He is focus both in instrumental and electronic music. He received commissions by Ars Musica Festival, Ensemble InterContemporain (2011 and 2020 ), French State (2015 and 2022 ), Teatro Colón de Buenos Aires (CETC), Festival Présences, etc. working with conductors like Matthias Pintscher, Guillaume Bourgogne, Zsolt Nagy, Rut Schreiner, Tetsuji Honna, Maxime Pascal, Léo Warynski, Christian Danowicz, Peter Vrábel, Frank Ollu, etc