Hungarian goalkeeper Krisztián Hegyi joined the Academy of Football from Szombathelyi Haladás in his home country in May 2019.

Hegyi had made an impression on first-team goalkeeping coach Xavi Valero before international clearance allowed him to make his West Ham United U18s debut against Brighton & Hove Albion in April of 2019.

Hegyi established himself as the first-choice goalkeeper for the U23s in the 2021/22 season and was named captain for the 2022/23 campaign. Capped regularly by Hungary U21s, Hegyi earned his first senior international call-up in March 2023.

He was loaned to EFL League One club Stevenage in summer 2023 and helped them defeat Championship side Watford in a penalty shootout on his debut in the EFL Cup first round. After making six appearances, Hegyi returned to West Ham in January 2024 before being loaned to Dutch Eerste Division outfit FC Den Bosch for the second half of the 2023/24 season, where he contributed six clean sheets in 17 outings to help his team stay in the second tier.

Hegyi was rewarded with a contract extension with the Hammers until the summer of 2027, with the option of a further year, then joined Scottish top-flight side Motherwell on loan in summer 2024, before being recalled and moving to Hungarian club Debreceni VSC on loan until the end of the 2024/25 season in mid-January 2025.