Joslyn Barnes is a writer and producer. Among the films that she has been involved with producing since co-founding Louverture Films are the features: Bamako (Abderrahmane Sissako), The Time that Remains (Elia Suleiman), Uncle Boonmee Who Can Recall His Past Lives and Cemetery of Splendour (Apichatpong Weerasethakul), White Sun (Deepak Rauniyar), Zama (Lucrecia Martel) and Capernaum (Nadine Labaki). 

Among the documentaries are: Trouble the Water (Lessin & Deal), Black Power Mixtape 1967-1975 (Göran Olsson), The House I Live In (Eugene Jarecki), Strong Island (Yance Ford), and Hale County This Morning,This Evening (RaMell Ross). 

Forthcoming documentaries include Angels Are Made of Light by James Longley and Aquarela by Victor Kossakovsky. 

In 2017, Barnes was the recipient of the Sundance Institute | Amazon Studios Producer Award. In 2018, she won the Emmy Award for Exceptional Merit in Documentary Filmmaking, and in both 2018 and 2019 earned Oscar Nominations for Best Documentary Feature.