After the reconstruction of the only Georgian race track Rustavi in 2011 Kajaia joined one of a newly established national teams, the MIA Force, sponsored by the national Ministry of Internal Affairs and won his first Legends race after a closely fought battle with more experienced rivals from Russia.

In 2012, Kajaia continued driving in the Georgian Legends championship and also contested Europe Nations Cup of the same category.

[9] In 2015 Kajaia entered the European Touring Car Cup series (ETCC) with the TC2T class BMW 320 Engstler team.

During the first race of the opening round on Hungaroring Kajaia was on his way to a shock win against the dominant Seat Leon Cup class cars in his inferior BMW but a mistake on a last lap relegated him to second overall.

During the first race he chased Petr Fulin in a Seat for the win but could not close in sufficiently to attack the Czech driver in a superior single make machinery.

Kajaia pushed his teammate hard, closing down on the German and putting pressure on him for the last several laps but could not find the way past and had to settle for second.