In 2020, Juliana Vieira represented the Brazilian national team at the
Pan Am Women's Team Championships, winning a bronze medal. In 2021, she secured a bronze medal at the
Junior Pan American Games and won titles at the
Brazil International and the
Dominican Open. In 2022, Vieira won women's singles titles at the Brazil International and the
Peru International. She also competed at the
South American Games, claiming gold medals in women's singles, women's doubles, and the mixed team events. In 2023, Vieira won the women's singles title at the
Santo Domingo Open, where she also secured the women's doubles title alongside
Sânia Lima. She additionally won the
El Salvador International and qualified for the
World Championships. At the World Championships, she defeated
Insyirah Khan of Singapore in the first round before being defeated by
Pornpawee Chochuwong in the second round. In 2024, Vieira qualified for the
2024 Summer Olympics women's singles event. In Group D, she was defeated by
Supanida Katethong of Thailand. In her second match, she defeated
Lo Sin Yan of Hong Kong, becoming the first Brazilian woman to win a badminton singles match at the Olympic Games. In 2025, Vieira won the gold medal at the
Pan Am Championships, becoming the first Brazilian woman to win the women's singles title at that tournament. == Achievements ==