Välimäki turned professional in early 2019 after the completion of his military service in Finland. He played mostly on the Pro Golf Tour during 2019. He won his first professional victory in February at the Open Casa Green Golf in Morocco.[2] He won twice more on the tour in August and also won the end-of-season Castanea Resort Championship for his fourth win of the season. Despite his four wins he only finished second in the Order of Merit.[3]
After his third win on the 2019 Pro Golf Tour, Välimäki earned a place on the Challenge Tour,[4] but later he qualified for the European Tour for 2020 by finishing 8th in qualifying school. In his fifth start of the 2020 season, he won the Oman Open, beating Brandon Stone in a playoff.[5]