 She began appearing internationally in the advanced novice category in November 2013, taking gold at the Warsaw Cup.In the following years, she won the Rooster Cup, Gardena Spring Trophy and NRW Trophy.Gubanova's junior international debut came at the 2016–17 ISU Junior Grand Prix (JGP) competition in Ostrava, Czech Republic; she won the gold medal by a margin of 0.08 over Japan's Rika Kihira, after placing second in the short program and first in the free skate.