In 2009 Pakhtakor qualified for the quarter-finals of the 2009 AFC Champions League and Tadjiyev was the top goalscorer of the club, scoring 5 goals in the tournament.

In 2013, he played the first half of season for Lokomotiv, scoring 4 goals in 9 matches.

In February 2015 he left Dinamo and signed a contract with FK Buxoro.

Tadjiyev has made 18 appearances for the Uzbekistan national football team, including seven FIFA World Cup qualifying matches, scoring a total of 3 goals.

This gave him entry to the Gennadi Krasnitsky club of Uzbek top goalscorers.