[2] He is a frequent collaborator of fellow Atlanta rapper Young Thug and has also worked with Kodak Black, Nicki Minaj, Juice WRLD, Birdman, Lil Wayne, Lil Baby, Rich Homie Quan, Gucci Mane, Giggs, Drake, Post Malone, T.I., 21 Savage, 50 Cent, Sfera Ebbasta, Summer Walker, Roddy Ricch and Ariana Grande, among others.

[clarification needed] As a way to save money, London drew upon his experience playing piano arrangements in church and began making beats for rappers.

By proximity of Young Thug, a member of Cash Money Records's spin off project Rich Gang, Holmes was led to sign with the label as an in-house producer by 2014.

[6] In April of that year, he was credited on labelmate Tyga's single "Hookah", which marked Holmes' first production to enter the Billboard Hot 100.

[7] In August of that year, rapper and label boss Bryan "Birdman" Williams referred to Holmes as "the best producer in the business, as we speak today".