In 2014, Kolosovskaya began her professional career with Sparta&K Moscow, playing in the Russian Premier League and the EuroCup.

[2] Kolosovskaya made her international debut at the 2012 FIBA Europe Under-16 Championship in Hungary, where Russia took home the bronze.

In 2013, Kolosovskaya moved up to the FIBA Europe Under-18 Championship in Croatia, where Russia placed fifth.

Russia would remain undefeated until the final, falling to the United States and taking home silver.

[4] However, Kolosovskaya failed to make Russia's final roster for EuroBasket Women 2017 in the Czech Republic.