Kim Hyun-jin debuted as a model in 2015 and then made his acting debut in 2020 with the web drama Sugar Coating. That same year, he appeared in another web series titled Can You Deliver Time. In 2021, he became part of Tencent Video’s boys’ love series Peach of Time, which also had a movie version that was released the same year. He then acted alongside Yoon So-hee in the rom-com web series Peng. In 2022, he was cast as one of the main characters in the SBS campus drama Cheer Up.