After making his international racing debut in 2014 in Formula Renault, Ralf stepped up to the Italian Formula 4 Championship in 2015, winning the title with Prema Powerteam, taking nine wins and 13 podiums in the 21-race season.

Since then, he has competed for Hitech GP in theFIA Formula 3 European Championship in 2017 and moved over to the Prema Theodore Racing team for 2018, winning races before taking on a team manager role at the team.