Serdachny played two seasons for Pursuit of Excellence in the Canadian Sport School Hockey League (CSSHL).

She made her debut for the Raiders on September 21, 2019, in a game against Holy Cross Crusaders where she recorded two goals.

[1] Following an outstanding season she was named to the ECAC All-Rookie team and Colgate women's hockey Rookie of the Year.

[15] During the 2022–23 season, in her senior year, she led the league in points with 25 goals and 45 assists in 39 games.

[21] Serdachny represented Canadian at the 2019 IIHF World Women's U18 Championship where she recorded three goals and one assist in five games and won a gold medal.

She represented Canada at the 2023 IIHF Women's World Championship where she recorded one assist in seven games and won a silver medal.

[16] She again represented Canada at the 2024 IIHF Women's World Championship where she recorded two goals and two assists in seven games and won a gold medal.

She scored the game-winning overtime goal in the gold medal game against the United States.