She first gained recognition for playing the title role in director Park Hoon-jung's action-mystery film The Witch: Part 1.

[4] In 2018, Kim played the role of a high school student in mystery thriller film Marionette.

[5] The same year, she played the lead role of Koo Ja-yoon in the action-mystery film The Witch: Part 1.

She received universal acclaim for her strong performance in a challenging role that included intense fighting scenes, and winning a large number of newcomer awards.

In March 2021, Kim was confirmed to join the SBS drama Our Beloved Summer with Choi Woo-shik, which premiered in December 2021.