[5] At the 2014 Scottish Open Grand Prix, she won in the women's doubles event, partnered with Gabriela Stoeva.

[6] In 2015, she won the Dutch Open in women's doubles against the top seeds, World No.7 Eefje Muskens and Selena Piek of Nederlands with the score 24–22, 21–15 in the final.

[16] They then finished runner-up in the Orléans Masters this time losing to Jongkolphan Kititharakul and Rawinda Prajongjai of Thailand.

Her sister, Gabriela, stated that their partnerships were lost communication on court, only arguing, and the energy around them was pretty negative.

[20] In the first semester of 2023, Stoeva has not been able to win any single titles, as her best results with Gabriela was being quarter-finalists in the Malaysia, India and the German Opens.

[21] Stefani and Gabriela claimed their first title of the year by winning the gold medal at the European Games, beating Dutch pair Debora Jille and Cheryl Seinen in the finals.

In the remaining tournaments in 2023, they were able to win the International Challenge titles in Scotland, Bahrain and Wales,[23] as well as finished runner-up in the Irish Open.

[25] She and her partner reached the finals in the German Open, but lost to Chinese pair Li Yijing and Luo Xumin.