In June 2015, she competed in the inaugural European Games, for Poland in canoe sprint, more specifically, the women's K-4 500m with Ewelina Wojnarowska, Edyta Dzieniszewska, and Beata Mikołajczyk. She earned a bronze medal. That year Naja and Mikołajczyk won the gold medal in the K-2 500 m and silver medals in the K-2 200 m in the K-2 1000 m at the European Championships.