Roser Aguilar earned a licentiate in journalism from the Autonomous University of Barcelona and a degree in film direction from the Cinema and Audiovisual School of Catalonia (ESCAC), as part of the school's first graduating class.

She specialized in management, and completed her studies with courses in screenwriting from Fernando Trueba and Joaquim Jordà [es], directing from Bob McAndrew and Juan José Campanella, and photography from Manuel Laguillo [es], Antonio Corral, and Pepe Baeza.

[3] Produced by Escándalo Films (linked to ESCAC) and starring Marian Álvarez, Juan Sanz, Lluís Homar, Alberto Jiménez, Marieta Orozco [es], and Carmen Machi, the film gained Aguilar widespread recognition in Spain.

It also received multiple international awards, including the 2007 Silver Leopard (award for the best performer) for Marian Álvarez,[4] and was nominated for the Golden Leopard for best director at the Locarno Festival, where it also won Boccalino D'Oro for Best Film of the festival, according to the Independent Review.

[5] In 2017, Aguilar released Brava, a film starring Laia Marull which explores the feeling of loneliness, misunderstanding, and shame that torments victims of sexual violence after the aggression is reported.