Before his time in motorsport, Cais was a downhill bike racer alongside another rally driver, Frenchman Nicolas Vouilloz.

His rally debut came in an Opel Adam Cup in 2018 before quickly moving to a Peugeot 208 R2 in the Czech championship.

In the following year he competed in the FIA European Rally Championship (ERC) behind the wheel of a Ford Fiesta R2T19.

In 2020, the British motoring weekly Motorsport News named him one of the current TOP 10 world rally talents (who do not yet drive in the WRC premier class).

[4] He appeared at the Auto UH Rallysprint Kopná race, where he won first place on almost home soil.