Rajski joined the Poland senior foil team in 2010. That same year he won the Poland national championship. With Michał Majewski, Paweł Kawiecki, and Radosław Glonek, he reached the final of the European Championships in Zagreb, but Poland could not overcome Germany and came away with a silver medal. Rajski's best individual result is a place in the table of 16 at the 2014 World Championships in Kazan, where he lost to reigning European champion James-Andrew Davis.