Stefan Rajkow only started in the 2006/2007 and 2007/2008 seasons in international competitions. He took part from January 21 to December 23, 2007 in a total of five World Cup races in the single-seater, with his best result of 31st place in his last race, the first of the 2007/2008 season . However, it also took last place at the same time. In the previous season he was only able to classify himself in the bottom of the World Cup races, but as 42nd in the overall World Cup he was second-best of the six Bulgarians who won World Cup points this winter. At the international junior championships, Rajkow also started in the doubles. At the Junior European Championships 2007 in St. Sebastian he finished with Galabin Bozew as well as at the Junior World Championships 2008 in Latsch with Petar Sawow the tenth and last place in the doubles. In the single-seater he was not included in the ranking on both occasions. The 2008 Junior World Championship was also his last international competition.
Bulgaria