Career
In 2002 the pair came second at the European under-23 championships in Zagreb, Croatia in the same event. Hungarian coach Zoltán Angyal was confident of Vajda"s ability but took the decision not to give him his senior international debut in 2002 or 2003. In 2004, Angyal was still keeping his cards close to his chest.
The Hungarian team did not take part in the early season international regattas: at the European Championships Hungary was represented in the C-1 races by Márton Joób and Sándor Malomsoki.
Angyal then shocked his rival coaches by selecting Vajda as his "secret weapon" for the 2004 Summer Olympics in the C-1 1000 m event. In his initial heat with a time of 3:57.290, Vajda qualified for the semifinals.
There, he placed second, this time at 3:52.236, advancing to the final round. Hungary is one of the few countries in the world where sprint canoers have the status of stars known to the general public and Vajda suddenly found himself the new "golden boy" of Hungarian canoeing.
His performances in 2005 suffered as a result of these distractions.
He started the season overweight and failed to make the podium in any major international race. Injury prevented him from appearing at the European championships, but he was determined not to miss the 2006 World Championships, held in his hometown of Szeged. At the 2008 Summer Olympics in Beijing, Vajda wore a black armband in dedication to his fallen teammate György Kolonics and dedicated his C-1 1000 m gold in Kolonics" honor.
In June 2015, he competed in the inaugural European Games, for Hungary in canoe sprint, more specifically, Men"s C-1 1000m.
He earned a bronze medal. Herbalife MOL EDF Energy A-HID Naturtex.