Ferreras is the creator of HBO’s long-running documentary series Habla (2003–2022) and the author of the award-winning novel B as in Beauty—published in the U.S. in 2009, and Spain, and Italy in 2012. He is also the co-creator of El Perro y el Gato (2003), a bilingual animated series for HBO Family.

His advertising work spans major clients such as HBO, MTV, Verizon, Dish, and DirecTV, as well as branded content for Kmart, P&G, Toyota, GSK, Genworth, and MetroPlus. He created and directed Madres y Comadres (2011), the first branded-content webnovela produced by Kmart for the U.S. Hispanic market, and the documentary Cada Paso del Camino (2017), commissioned by AARP and D Expósito & Partners, which premiered at the New York Latino Film Festival and went viral on Facebook with over 7 million views.

He made his screenwriting debut with the feature film ¡Que Viva la Música! at the 2015 Sundance Film Festival. His award-winning independent short films have been presented at the Berlinale, Outfest, Image + Nation, and numerous other festivals worldwide.

For the stage, Ferreras wrote and directed The Miracle (2024) and Hamlet in Harlem (2022)—both produced at Theater for the New City in New York—, and the comedy My Audition for Almodóvar (2011) at IATI Theater.

His photographic work has been exhibited at the Museum of Modern Art in Bogotá in the digital show Ciudades Durmientes (Sleeping Cities, 2020), and in his video installation Somos, which features 150 of his iPhone portraits of U.S. Latinos.

As a lyricist, he collaborated with Madonna on the Spanish adaptation of What It Feels Like for a Girl for her Drowned World Tour, and with Los Crema Paraíso on Varón Domado for their album De Película.