She swam the women’s 100m backstroke in a time of 59.42 in the short course race to win the gold medal, becoming Israel’s first-ever youth swimmer to break the minute barrier, surpassing the previous national junior record of 1:00.15 that Anastasia Gorbenko had set in 2018.

[3][16][17] Barzelay is a student at Texas A&M University, where she studies business administration, and a member of its Aggies swimming team.

[18] In June 2021 at the Internazionali di Nuoto - 58 Settecolli in Rome, Italy, at 19 years of age she won the silver medal in the 200 back with a time of 2:10.76, two seconds behind Italian former 3-time European champion Margherita Panziera.

[19][20] She split 1:03.32/1:07.44, breaking the previous Israeli record of 2:10.86 established by Anastasia Gorbenko earlier in the year.

[17] She earned College Swimming Coaches Association of America (CSCAA) Scholar All-America honors.

[17] In May 2022 Barzelay competed at the Trofeu Internacional Ciutat de Barcelona / Mare Nostrum in Sant Andreu, Spain, and won the bronze medal in the 200 L back with a time of 2:11.68.

[25] In her sophomore year, at the 2023 NCAA Division I Women's Swimming and Diving Championships in the 100 back Barzelay swam 53.45.

[26][27] At the 2023 European U23 Championships held in August in Dublin, Ireland, Barzelay won the gold medal in the 200L back with a time of 2:11.35.

[28][29] In 2023–24, in her junior year, at the 2024 NCAA Division I Women's Swimming and Diving Championships, Barzelay had a time of 53.28 in the 100 back.