The group's initial struggles gave way to sudden success after they went viral in 2019, and their discography includes the album Get in the Zone (2020) and two extended plays (EPs).

As SB19's creative director, Justin has directed several of their music videos and spearheaded their 2021 online concert Back in the Zone.

They were considering giving up on the band before their dance practice video for "Go Up" went viral in 2019, leading their leader Sejun (now Pablo) to call it their "redemption song".

[9] Justin wrote and directed the animated music video of "Hanggang sa Huli" (lit.

[7][12] The group became the first Filipino act to be nominated for a Billboard Music Award when they became a contender for the fan-voted category Top Social Artist.

[13] Justin later co-led the EP's merchandise campaign, offering input on artists Irmay Ledesma and Bea Zaragoza's designs.

[7][15] In May 2022, Justin surpassed one million followers on the social media platform TikTok and shared an unreleased original song titled "Parellel Universe".

[16] In July, he and members of his friends and family started Visar Society, a business selling products with a "nature-like aesthetic".

[21] The song was a commercial success,[22] while its popularity on TikTok helped introduce SB19 to viewers in other countries, such as the United States.