BUDAPEST — Maggie Steffens, just 24, has won nearly everything in water polo.

As a member of the United States national team, she has won two Olympic gold medals, two world championships, two Pan-Am Games titles and two World Cups. At Stanford, she won three N.C.A.A. championships.

Arguably the world’s best female water polo player, Steffens now has an unexpected feat in her sight: a Hungarian League title.

This season she is lending her prodigious offensive skills to the Hungarian professional club UVSE, which is seeking its fourth consecutive championship. It plays its home matches on Margaret Island in the middle of the Danube River, the same venue where Steffens and her American teammates defeated Spain to win the 2017 world championship.

Not having similar professional opportunities in the United States, Steffens joined UVSE midseason in January after completing classes at Stanford, where she is pursuing a master’s degree in management science and engineering.