[2] Lee made her international debut at the 2017 Junior Asian Championships where she helped the South Korean team win the bronze medal behind China and Japan.

She also placed fourth in the all-around and sixth on the balance beam, and she won the bronze medal on the floor exercise behind Chinese gymnasts Li Qi and Chen Yile.

[3] She also competed at the 2018 Junior Asian Championships where South Korea once again won the team bronze medal behind China and Japan.

[11] She was then selected to compete at the World Championships alongside Eom Do-hyun, Ham Mi-ju, Lee Eun-ju, and Yeo Seo-jeong, and they finished 16th in the qualification round.

She returned to competition at the postponed 2020 Olympic Games and qualified for the all-around final where she finished 21st with a total score of 51.632.

[23] Lee competed on the uneven bars at the 2023 City of Jesolo Trophy, helping South Korea win the team silver medal behind Italy.

She won the bronze medal in the uneven bars final behind Italians Alice D'Amato and Giorgia Villa.

[30] At the 2024 Summer Olympics, she finished 56th in the all-around, placing 63rd on uneven bars and balance beam, and 75th on floor exercise.