He is the younger brother of Slovak figure skater Alexandra Hagarová, who is also one of his coaches.

Debuting on the ISU Junior Grand Prix series, Hagara placed 13th in Košice, Slovakia, in early September 2021.

Deciding to continue in the senior ranks, he placed ninth at the Budapest Trophy and then won medals at his following three events: gold at the Tirnavia Ice Cup in Slovakia, bronze at Skate Celje in Slovenia, and bronze at the Santa Claus Cup in Hungary.

In April, he qualified to the final segment at the 2022 World Junior Championships, finishing 16th in the short and 21st overall.

[4] Competing as a senior, Hagara had one Challenger assignment, and finished eighth at the 2022 Nepela Memorial.

[8] At the 2024 World Junior Championships in Taipei, Hagara finished third in both segments of the competition and overall, claiming the bronze medal.

[4] Beginning the season on the Junior Grand Prix, Hagara won the short program at the JGP Czech Republic, but after finishiing fifth in the free skate, he dropped to third overall and claimed the bronze medal.

[4] With these results, Hagara was named as the first alternate for the 2024–25 Junior Grand Prix Final.

[11] Going on to compete as a senior on the 2024–25 ISU Challenger Series, Hagara finished fourth at the 2024 Nepela Memorial.