Choi competed at the 2022
FIS Snowboarding Junior World Championships where she won a gold medal in the halfpipe event. In January 2023, she competed at the
Winter X Games XXVII and won a gold medal in the SuperPipe event. At 14 years, two months, she broke
Chloe Kim's record as the youngest X Games snowboard halfpipe gold medalist. During the
2023–24 FIS Snowboard World Cup, Choi made her
World Cup debut on 16 December 2023 and won the halfpipe event with a score of 92.75, defeating the
2022–23 FIS Snowboard World Cup crystal globe winner
Mitsuki Ono. During the
2025–26 FIS Snowboard World Cup season opener on 11 December 2025 she won the halfpipe event with a score of 92.75. A week later on 19 December 2025, she won the halfpipe for the second consecutive week with a score of 94.50. She was the only rider in the final to score above 90 points. On 17 January 2026 she won her third consecutive World Cup halfpipe event. In January 2026, Choi was selected to represent South Korea at the
2026 Winter Olympics. She competed in the
halfpipe event and won a gold medal with a score of 90.25. She overcame a leg injury during competition to defeat two-time Olympic gold medalist Chloe Kim, becoming the first South Korean athlete to win gold in snowboarding at the Winter Olympics. At 17 years, 101 days, she became the youngest Olympic gold medalist in snowboarding history, surpassing the previous record set by
Red Gerard at the
2018 Winter Olympics. ==References==