As a Grammy Award-winning songwriter, Hansen often works with his bandmates and producer Frank Dukes and is credited for co-writing hit songs by Drake, Kendrick Lamar, Daniel Caesar, and Kali Uchis, among others.

[4][6] In his first year, he met fellow music students Alexander Sowinski and Matthew Tavares and began collaborating with them, creating what would become BADBADNOTGOOD.

The band had viral success in 2011 after posting jazz covers of Odd Future songs online, and released their debut record that Fall.

[7] With BBNG, Hansen has released five full-length albums, including a collaborative record with Ghostface Killah, and has been short-listed for the Polaris Music Prize twice.

One critic commented, "Hansen has married the sounds and dexterous, melodic playing style of yesteryear with a modern band and music scene.