Mike Lévy (born 13 June 1987), known professionally as Gesaffelstein, is a French record producer and DJ. He has worked alongside artists as varied as The Weeknd, Tiga, Miss Kittin, A$AP Rocky, Lana Del Rey, Phoenix and Kanye West. He co-produced two tracks on Yeezus, the sixth album of American rapper Kanye West, including the lead single "Black Skinhead" and "Send It Up", both tracks produced with Kanye West, Daft Punk, Brodinski and Mike Dean. On October 28, 2013, Gesaffelstein released his debut album Aleph under OWSLA, Bromance Records, Parlophone Records and EMI Music, which had been recorded since 2011. His remix of "Shockwave" by The Hacker is featured in the 2013 video game Grand Theft Auto V, on the Soulwax FM radio station. In 2015, Gesaffelstein released the single "Conquistador" in collaboration with Jean-Michel Jarre and also produced the soundtrack for the 2015 film Maryland. In early 2018, he produced the tracks "I Was Never There" and "Hurt You" from The Weeknd's My Dear Melancholy, EP. Gesaffelstein signed to Columbia Records in November 2018, with whom he released the lead single "Reset" from his second studio album Hyperion in the same month. In January 2019, he released a collaboration with The Weeknd titled "Lost in the Fire" as the second single from Hyperion.