Hajiyev began playing football at Araz Nakhchivan, which participated in Soviet Second League. He has also managed another Tabriz side Tractor Sazi for a one season In 2005, he worked in Azerbaijan national football team, assisting Vagif Sadygov. In 2006, he returned to Azerbaijan and worked as president consultant at Football Club Baku, however at the end of the 2005-2006 season Football Club Baku head coach Asgar Abdullayev was sacked, and Hajiyev accepted the team as a caretaker.
Foreign a next season the manager signed a one-year contract with Football Club Baku.
But this time capitals finished the season in 3rd position, failing two European companies after first rounds. On this, Hajiyev era at Football Club Baku ended.
After two years of downtime, Hajiyev appointed as a new head coach of Standard Sumgayit replacing Valdas Ivanauskas. That became the managers worst experience and Sumgayit side relegated to Azerbaijan First Division, whereupon Hajiyev was sacked.
Neftchi Baku Hajiyev repeated the success, and brought PFC Neftchi Baku second consecutive championship.
In 2012, he became the first Azerbaijani manager to reach European cups group stage, as Neftchi qualified for the 2012-2013 Union of European Football Associations Europa League group stage, beating APOEL F.C. and being the first Azerbaijani team to advance to this stage in a European competitions. Following Neftchi"s elimination from the Champions League during the 2013-2014, Hajiyev from his position as manager on 25 July 2013, Hajiyev was reappointed as Neftchi"s manager on 11 January 2014. In 2014, in a press conference upon Europa League, Hajiyev said, "I"m an encyclopedia.
I will open the chest, pour the cotton", which resulted in the media dubbing him "The Encyclopedia".