He made his debut as a member of Golden Child in the reality series Woollim Pick in 2017.

[2] Jaehyun was appeared in the first episode of Dingo web drama Convenience Store Fling on January 23, 2021, marking his acting debut.

[3][4] On April 6, 2023, Jaehyun was confirmed to cast members on web drama High School Return of a Gangster[5] scheduled to premiere in 2024.

[6][7][8] Later that months, he made his screen debut in horror film Urban Myths premiered on April 27.

[9][10] On August 22, 2023, Jaehyun was confirmed to cast as Eunho[11] in the drama Twinkling Watermelon, which aired on September 25.