Jonas W. Karlsson is a Finnish producer and songwriter. He was with the Finnish band Elokuu, and worked with Madeline Juno. He is a longtime collaborator of Sofi de la Torre, with whom he wrote the song "Vermillion" (2014), a release praised by critics. Discography With Elokuu As producer Another. Not Me. I'm Done (Sofi de la Torre, 2017) References Finnish record producers Living people Year of birth missing (living people)