Janik competed at the 2017 European Championships, and she was the second reserve for the vault event final. At the FIG World Cup in Osijek, she won the bronze medal on the uneven bars behind Anastasiia Iliankova and Zsófia Kovács. She then competed at the 2017 Summer Universiade, and she finished 7th in the all-around final with a total score of 52.050, and she finished 5th in the vault final. At the FIG World Cup in Cottbus, she finished 7th in the vault final.