Alexejewa started for the first time in December 2017 in Ruka in the European Cup and finished 12th and ninth. At the 2018 Junior World Championships in Minsk , she jumped to 11th place. She made her World Cup debut in January 2019 in Lake Placid , which she finished in eighth place. The following month, she finished sixth at the World Championships in Park City . In the 2019/20 season in Moscow she achieved her first podium finish in the World Cup with third place and 18th place in the Aerials World Cup at the end of the season.