[4] FKJ has performed at music festivals including Coachella,[5] Euphoria,[6] CRSSD,[7] Lollapalooza, and Lightning in a Bottle.

[9][10] FKJ achieved significant public attention after the release of the fully improvised song "Tadow" and accompanying studio recording in 2017.

[11] In April 2017, FKJ announced that he was performing at the 2017 Coachella Valley Music and Arts Festival at the Do Lab Stage.

From a young age, he immersed himself in music from his parents' libraries, including "English rock, Queen, Pink Floyd, The Police... '70s rock, Led Zeppelin... some jazz or Nina Simone, Billie Holiday, Miles Davis... a little bit of French music, but not too much, like Serge Gainsbourg.

"[12][11] In March 2019, FKJ married fellow musician June Marieezy[13] (who uses the stage name ((( O )))) with whom he had previously collaborated, on the track "Vibin' Out".