Longfield started her YouTube channel in 2007. She gained popularity after collaborating with Rob Scallon on a series of metal covers performed on ukulele.[4][5][6] In 2012, she formed her band, The Fine Constant, with whom she has released two albums. The band performs with Longfield on her solo tours.[7] They have toured with acts such as Marty Friedman, Angel Vivaldi, and Polyphia.[8]
In 2017, Longfield contributed a track to She Rocks, Vol. 1, a compilation released by the record label Favored Nations.[9] In 2018, she signed with label Season of Mist and released the album Disparity. She produced the album herself.[10] The label also reissued her prior album, Collapse // Expand.[11]
Longfield was named on a list of "15 of the World's Greatest Seven- and Eight-String Guitarists" by Guitar World in 2018.[12] In 2019, her signature series guitar was developed by Strandberg Guitars.[13][14]
In 2021, Longfield joined John 5 on tour.[15] She went on a hiatus to pursue a college degree, completing her Furniture Design program at Minneapolis College of Art and Design.[16] In November 2023, Longfield and Eric Collier released the single Glimpse of the Finale as Chrome Coda. In 2024, she was working on a new solo album.[17]
