[8] Polimá WestCoast's first steps in music were in 2015, however, it wasn't until 2018 that his career would take a turn with his single "Brokeboi", which became an anthem for the movement known as Brokeboyz (a fast and worrieless life), which he formed together with other musicians from the Chilean urban scene.

[9][10][11] Later, WestCoast together with fellow Chilean artists Ceaese and Young Cister released the song "Te Quiero Ver", which has more than 50 million views on Spotify.

On February 15, 2022, he released the single "Ultra solo" with Chilean singer Pailita, the latter was a success on digital platforms such as Spotify, in which he collected more than 200 million views.

On February 14, 2022, WestCoast alongside Pailita released the song "Ultra Solo", which was a commercial success and which on June 27, 2022, was included in the Billboard Global 200, occupying position number 9.

[17] On June 16, 2022, the remix of "Ultra Solo" was released, with the participation of Chilean-American singer Paloma Mami, Colombian singer-songwriter Feid, and Puerto Rican-American rapper De la Ghetto, which was also a success.