From 2007 to 2008, he served in the Azerbaijani Armed Forces in the Aghjabadi District, before being transferred to the Central Sports Club of the Ministry of Defence due to his status as a promising sportsman.

Participating in the first national competition, he was noticed and invited to train in one of the famous sports clubs of the Republic, Budokan, under the leadership of Fizuli Musayev.

[2] At the first championship of the Republic, Aghayev won an overwhelming victory over all his rivals and was noted by the President of the National Karate Federation, Yashar Bashirov, who saw great potential in him and his unusual fighting tactics.

[2] At his first World Championship among Cadets and Juniors, which was held in 2001 in Athens, he won 3rd place in the team event, and the following year became the European Champion.

From the official sponsor of the Federation, the International Bank of Azerbaijan, he received the keys for a new apartment in one of the elite areas of the city, as well as an Audi Q7.

In August 2021, Aghayev competed in the inaugural Olympics Karate event, earning silver medal in the Men's kumite 75 kg division.