At the 2015 World Championships, Kuc competed with Claudia Chmielowska, Katarzyna Jurkowska-Kowalska, Klara Kopeć, Gabriela Janik, and Marta Pihan-Kulesza, and the team finished 19th. She finished 4th in the all-around and won the silver medal on the uneven bars at the 2016 Polish Championships. Then at the Gym Festival Trnava, she won the silver medal in the all-around behind Hitomi Hatakeda of Japan. She competed at the 2016 European Championships alongside Katarzyna Jurkowska-Kowalska, Klara Kopeć, Gabriela Janik, and Paula Plichta, and they finished 11th. At the 2017 European Championships, Kuc competed only on the uneven bars and finished 18th in the qualification round.