Välimäki turned professional in early 2019 after the completion of his military service in Finland.

He won his first professional victory in February at the Open Casa Green Golf in Morocco.

In his fifth start of the 2020 season, he won the Oman Open, beating Brandon Stone in a playoff.

[5] In October 2023, Välimäki claimed his second European Tour win at the Commercial Bank Qatar Masters, beating Jorge Campillo in a playoff.

[7] Source:[8] European Tour playoff record (2–0) Results not in chronological order in 2020.