Benjamin Stefanski (born 17 April 1987), better known by his stage name Raffertie, is a British composer and producer, based in London, England.

Recognised as both a producer and DJ he has a reputation for performances filled with a dynamic energy that saw him play across Europe from Fabric to Space as well as festivals Glastonbury and Bestival before he had graduated.

"Visual Acuity EP," his first physical release for Ninja Tune was record of the week on Nick Grimshaw's show on BBC Radio 1, who described it as "Crazy, but so, so good.

"[6] It also received airplay from Rob Da Bank, Lauren Laverne, Huw Stephens, Jen Long and Mary Anne Hobbs.

Subsequent to the release of his debut album, Raffertie has largely worked as a film score composer, including a remix of The Heavy's 2009 hit "How You Like Me Now?"