[1][3] St. John has written for a number of artists, most notably Britney Spears, Kim Petras, Dorian Electra, Charli XCX, Brooke Candy, and The Neighbourhood, among others.
[1][2] Jesse Saint John began his career in songwriting writing for Brooke Candy, a personal friend.
He has also worked with artists such as Britney Spears, Camila Cabello, Lauv, the band The Neighbourhood, Charli XCX and Aquaria.
[2][3] In 2019, a song Saint John wrote with Lizzo in 2017 titled "Truth Hurts" gained popularity, eventually topping the Billboard Hot 100.
[4] In 2020, he wrote an English version of the song "Voice" (목소리; Moksori) by Loona, called "Star".