Since then he has worked on several big-name projects such as the Shantae series, Contra 4, Red Faction: Guerrilla, DuckTales: Remastered, Shovel Knight, and Crypt of the Necrodancer.

[6] He was a full-time employee of Volition while working on Red Faction, but in January 2010, he left the company to become the "lead audio guy" for WayForward, for which he had already composed several soundtracks such as those of Shantae and Contra 4.

[8] Original Sound Version named Kaufman their Composer of the Year for 2011, based on his work on BloodRayne: Betrayal and Mighty Switch Force, as well as several other soundtracks and arranged albums.

On November 1, 2014, Kaufman announced that he was leaving WayForward on mutual terms to work as a freelance composer and sound designer from his own studio, in order to be able to set his own schedule and choose his own projects.

[10] The last games which he worked full-time for the company were Teenage Mutant Ninja Turtles: Danger of the Ooze and Shantae: Half-Genie Hero, the latter being composed between 2013 and 2015 but only released in late 2016.

In February 2015, Kaufman collaborated with Jessie Seely, a video game vocalist and professional artist, to launch the Kickstarter campaign of [NUREN] The New Renaissance.

In March 2016, Kaufman and recording engineer Robert Altschuler founded their own music label called Mint Potion, based in Santa Clarita, California.