Hajdari started his career with Partizani Tirana at youth level at a young age. He played for the 17s and 19s sides for the club before transferring to KF Tiranain the summer of 2007. Following his move away from Partizani, Hajdari was put into the senior team straight away and began to train with the first team players. He was selected as a federated player for the 2007–2008 season for KF Tirana. However, despite being in the first team he was also selected for some KF Tirana U-19 matches in order to gain more experience at the club.
KF Tirana
2007–2008
He made his league debut for KF Tirana on 8 December 2007 against KS Skenderbeu Korce, Hajdari came on in the 63rd minute for the veteran Nevil Dede. His first league start of his career came on the final day of the season against KS Kastrioti Kruje. Hajdari played the full game in midfield. During the 2007-08 champaign he managed to feature in 4 games without scoring.
2008–2011
Hajdari was part of a number of young players that were in the senior team ahead of the new season, all of them trying to impress new manager Blaž Slišković in order to gain a place in the senior team for the 2008–09 season. Hajdari was part of the lucky few that were picked by Slišković to feature in his team for the new season. His first game of the 2008–2009 season came on the opening day of the season against KS Vllaznia Shkoder. Hajdari came on in the 83rd minute for Migen Memelli. During the 2008–2009 season KF Tirana were crowned champions of Albania after a successful season, Hajdari was part of the success but played just 5 games during the entire season, including a start in a Tirana derby against Dinamo Tirana.
Hajdari decided to move to United States where he joined the New YorkRed Bulls. He was made part of the team from John Wolyniec, an ex player now the coach of the New York red Bulls 2nd team. Hajdari played 12 games in the NPSL league where the Red Bulls was part and scoring 9 goals.
International career
Albania U-17
He was selected by coach Edmond Licaj to be tested for the Albanian U-17 team on 13 September 2006, whilst still playing for KF Partizani Tirana. He was selected by Licaj for the match against Finland in which Albania lost 4–1 in Finland. Hajdari was given the number 11 shirt and was picked in the starting eleven and also the captain of this team.
