Min arrived to international recognition playing "Ben Hargreeves" on the hit Netflix series The Umbrella Academy. Season 2 (which premiered earlier in the pandemic) of the wildly successful series has been very well-received, spent over a month on the Netflix Top 10, while also leading Nielsen's first streaming Top 10. The first season of the show was Netflix's 3rd most popular of 2019.

Justin also took on the title character in A24’s drama feature After Yang, directed by the acclaimed filmmaker Kogonada. Min plays Yang opposite Colin Farrell. The story centers on a father and daughter as they try to save the life of their robotic family member in a world where robotic children are purchased as live-in-babysitters. In the story, Yang has been programmed to help his little sister learn about her cultural heritage, and we/he learns what it means to be human.

Justin can be seen reprising his role as "Ben Hargreeves" in The Umbrella Academy. He also appears in the dramedy series, Beef, joining co-stars Steven Yeun and Ali Wong.