She has won four singles and four doubles titles on the ITF Women's Circuit.

Playing for Thailand Fed Cup team, Thamchaiwat has a win–loss record of 3–0.

[1] Thamchaiwat made her WTA Tour main-draw debut at the 2024 Thailand Open 2, in the doubles event, partnering Thasaporn Naklo.

In the First round, Belgian Lara Salden and Kimberley Zimmermann were defeated in both sets.

This biographical article relating to Thai tennis is a stub.