Karting Korjus was born in
Tallinn, the son of former
sidecarcross racer Aivar Korjus. He made his pan-European karting début in 2006, competing in the Rotax Max Euro Challenge for the AGS Racing team. He finished sixth overall in the championship standings, 25 points behind the champion
Jack Hawksworth. As well as that, he finished thirteenth in the Challenge finals, as well as being Estonian champion at Junior level. 2007 saw Korjus win the Estonian title once again, and he also picked up the Baltic Junior title and was the winner of the
Rotax Max finals. He did however finish runner-up by two points to Mats van den Brand in the Euro Challenge. In 2008, Korjus competed in the Junior classes in the pan-European championship, but progressed to the Senior class in his local championships. In the Junior championships, he won the Euro Challenge and was second to Facundo Chapur in the Challenge Finals and Rotax Max Grand Finals at La Conca, Italy, 2008.
Formula Renault 2.0 While completing his career in karts, Korjus also spent 2008 adjusting to single-seaters, competing in the first
Finnish Formula Renault championship. Racing for the T.T. Racing Team, Korjus finished all but one race on the podium, as he finished runner-up to
Jesse Krohn in the championship. Of those podiums, three were race victories that came in the final four races of the season, including a double at
Ahvenisto. Korjus continued with the team into the 2009 season, but moved into the
Formula Renault 2.0 Northern European Cup. Korjus finished all bar one race as he finished fifth in the championship; his best result being a second-place finish at
Most. Korjus stepped up to the
Eurocup Formula Renault 2.0 championship for its
2010 season, and moved to the Koiranen Bros. Motorsport team. Despite qualifying on the third row for both races, Korjus won them both, becoming the first driver to win a race in the championship in the newly introduced cars designed by
Barazi-Epsilon. He is also the youngest person to win a Eurocup Formula Renault 2.0 season.
Formula Renault 3.5 Series With his results and potential in the
Formula Renault series, Korjus joined the
Renault Driver Development programme for the continuation of his career. He was signed to drive for
Formula Renault 3.5 Series team
Tech 1 Racing in late 2010. In
2011 season he placed sixth place overall and second in the Rookie of the Year standings, and finished the season with fastest lap, three wins and four podium finishes during the season. Korjus began the
2012 season with Tech 1, where he was partnered with series debutant
Jules Bianchi. Korjus endured a difficult season, with a string of early retirements and mechanical problems that affected his qualifying performances, though he recovered to finish on the podium in the second race at the
Moscow Raceway. However, with three rounds left in the season, Korjus left Tech-1 and joined the
Lotus-backed
Charouz Racing System team, and his place at Tech 1 was taken by
GP3 series runner-up
Daniel Abt.
GP3 Series Korjus left the Formula Renault 3.5 Series at the end of the 2012 season, moving to the
GP3 Series for
2013, racing for
Koiranen GP. He finished the season seventh overall, recording four podiums, and finished in the points in 11 of the season's 16 races.
Formula One Korjus had his first outing in a
Formula One car at the
Abu Dhabi young driver test on November 16, 2011, driving a
Renault R31. Korjus served as
Lotus F1's testing and reserve driver at the
2012 Italian Grand Prix. With regular driver
Romain Grosjean serving a one-race ban for causing a serious accident at the
Belgian Grand Prix, the team promoted regular test driver
Jérôme d'Ambrosio to fill Grosjean's seat for the race, and Korjus was recruited to fill in the vacant reserve driver position.
European Le Mans Series In 2014, Korjus moved to sports car racing, driving an
ART Grand Prix McLaren MP4-12C in the
European Le Mans Series. ==Racing record==