Juan and Jayne, a husband and wife team, founded Carnival Coffee Roasters in 2019 in Penge, south east London, after a conversation in a local pub. The connection to coffee is deeply personal: Juan's grandfather won a mountain in Medellin, Colombia, in a card game, and the family has grown coffee on it ever since. The roasting runs on a Loring air roaster visible to customers on roasting days, and the sourcing emphasizes relationship coffee from Colombia, Ethiopia, and Nicaragua. All packaging is designed by Penge based artist Rosie Lovelock, with unique mask illustrations inspired by the carnival theme. The operation extends into collaborations with local breweries on specialty coffee beers and cycle deliveries across south east London.