As a junior Kim participated at the 2016 and 2018 World Junior Speed Skating Championships. She won a silver medal in the 500 metres event at the 2016 World Junior Speed Skating Championships and a silver medal in the team sprint event at the 2018 World Junior Speed Skating Championships. Kim represented her nation at elite level at the World Sprint Speed Skating Championships for Women in 2018, finishing 14th overall. She also competed at other international competitions, including at ISU Speed Skating World Cups.