Janik competed at the 2008 Junior European Championships and finished 7th in the vault final. She won the silver medal on vault behind Paula Plichta at the 2010 FIG World Cup in Osijek. She competed at the 2010 World Championships alongside Plichta, Marta Pihan-Kulesza, Katarzyna Jurkowska, Monika Frandofert, and Joanna Litewka, and they finished 17th in the team qualification round.