James Gregory Scheffer, known professionally as Jim Jonsin, is an American record producer and songwriter from South Florida. He has produced for numerous musical artists, including Beyoncé, Kelly Rowland, Usher, Lil Wayne, Kid Cudi, Eminem, Pitbull, Yelawolf, Nelly, Mary J. Blige, Wiz Khalifa, Danity Kane and Jamie Foxx, among others.