[1] A member of the Renault Sport Academy in 2017,[2] Opmeer previously raced in the SMP F4 Championship, where he finished runner-up to Richard Verschoor in 2016 with MP Motorsport.

Opmeer moved into sim racing for the 2019 Formula One Esports Series with Renault, finishing fourth in his rookie season.

He took seven victories and thirteen podiums in his debut year of F4, finishing second place in the championship to fellow countryman Richard Verschoor.

[3] He had seven-point-scoring finishes including the 5th place in the penultimate race of the season at Circuit de Barcelona-Catalunya.

The 2022 season proved to be much more difficult for Opmeer, as his struggles in qualifying heavily affected his race results.

[11] As a free agent driver, Jarno signed a multi-year deal with Red Bull Sim Racing on 21 August 2024, joining Frederik Rasmussen on the team.

In his first year he finished fifth overall in the standings, scoring his debut podium in the final round set in Rome.