At the 2014 World Championships, Kim became the first Korean men's singles skater to pass the 200-point total mark.

[2] In August 2022, Kim announced that he was engaged to longtime girlfriend, Park Seon-kyung, and she was pregnant with their first child.

Within a few months, his then-teacher recognized Kim's potential and suggested skating seriously to try to make the Korean national team.

In June 2011, Kim sustained an injury to his left eardrum after falling on a rainy day during an outdoor practice session.

[citation needed] Despite being only partially recovered from the injury, Kim participated in the qualifying event for the ISU Junior Grand Prix (JGP) series but was unsuccessful.

[7] Kim won his country's JGP selection event, held in August, earning two spots for the Junior Grand Prix.

He made his junior international debut at the JGP Austria, where he won the bronze medal after being placed tenth in the short and second in the free skate with a total of 175.87.

[9] At the 2014 Ondrej Nepela Trophy, Kim became the first Korean male skater to break the 70-point mark in the short program with the score of 71.44.

At the Trophée Éric Bompard in Bordeaux, France, he placed 9th in the short program before the free skate was cancelled due to the November 2015 Paris attacks.

Kim finished twenty-sixth in the short program the World Championships, failing to qualify for the free skate segment of the competition.

Kim began the 2017–18 figure skating season with a tenth-place finish at the 2017 CS Ondrej Nepela Trophy.