2017 In 2017, when she was just 12 years old, Sfiringu made her junior elite debut, competing at the 2017 Romanian Championships. There, she was 8th in the All-Around with a score of 50.232. She won the bronze medal in vault and was 7th on floor exercise. Later that year she competed at the 2017 Romanian Junior Championships where she won her level (Junior II Level 4) with an AA (all-around) score of 53.430. She also won the silver medal on vault, uneven bars and balance beam and the bronze medal on floor. She finished her junior elite debut with her first international competition at the 2017 Top Gym Tournament that was held from November 25 through November 26 in
Charleroi, Belgium. She placed 22nd in the AA with a total score of 46.700, 8th on vault and 6th on floor.
2018 In April 2018, Sfiringu competed in
Jesolo, Italy at the 2018 City of Jesolo Trophy, placing 6th with the team (Iulia Berar,
Antonia Duță, Ana Maria Puiu). She was 20th in the AA with 49.766, the second best Romanian after Berar who finished 12th. In May she went to
Rabat, Morocco for the 2018 Gymnasiade and won 2 bronze medals (beam and floor). In July, Sfiringu won the gold on vault and led the team to victory at the Izvorani Friendly. She then had her biggest competition so far in
Glasgow, Scotland at the
2018 European Championships with teammates
Ioana Stănciulescu,
Daniela Trică, Antonia Duta and Ana Maria Puiu. They finished 4th as a team. Sfiringu finished the AA in 7th with a score of 51.265. She also made the vault and beam finals, where she placed 5th and 6th, respectively. In October, Sfiringu became first junior gymnast in Romanian Gymnastics history to win the all-around national competition at the age of 14, with a score of 53.600, after
Larisa Iordache won the title 5 years in a row. There, she also won the team competition for CS Farul Constanta with Ioana Stanciulescu and Maria Holbura, vault, floor and the bronze for the uneven bars. Sfiringu finished her year at the 2018 Top Gym Tournament where she won vault.
2019 Sfiringu's first competition of the year was the 2019 FIT Challenge in
Ghent, Belgium where she won gold with the junior team and silver with the seniors led by
Denisa Golgotă. Sfiringu was 2nd in the AA to teammate
Ioana Stănciulescu who won the competition. At the 2019 Romanian Junior Championships Sfiringu won her 3rd junior AA national title. In June at the
2019 Junior World Artistic Gymnastics Championships in
Győr, Hungary, Sfiringu and her team (Ioana Stănciulescu and
Antonia Duță) finished 4th despite having a total of 6 falls. Sfiringu also made the floor final where she placed 6th. At the
2019 European Youth Summer Olympic Festival Sfiringu qualified to all apparatus finals except uneven bars, where she had a fall in qualification. In this meet she won silver with her team (behind Russia) and on balance beam (behind
Ondine Achampong of Great Britain), as well as getting the bronze medal on vault and floor exercise. At the 2019 Romanian Championships (September 6 through September 8) in
Ploiești, Romania, Sfiringu won the silver medal in the all around with a score of 53.350. In this meet she also won the team and uneven bars gold medals and the balance beam bronze medal. == Senior career ==