He served in the first, fourth and fifth cabinets of Azerbaijan Democratic Republic as its State Controller and Minister of Postal Service and Telegraph.

Upon his return to Azerbaijan in 1915, he worked as a trustee of the Muslim Refugee Committee, which was established to provide assistance to the victims of the First World War in the Seaside district of Batumi province.

Hajinski was appointed the lawyer of the Transcaucasia Committee of the Provisional Government of Russia in April 1917, and worked in this position until July of the same year.

In 1918, Hajinski gave lectures on Azerbaijani art at the "Turkish Homeland" Society, and published articles under the signature "gubali" in the press of the time.

[6][7] Along with his relative Mammad Hasan Hajinski, he was one of the 26 deputies who voted for the Declaration of Independence adopted by the Azerbaijani National Council on May 28, 1918.

Camo bey Hajinski, a member of the "Socialist faction" in the Parliament, was appointed to the position of Minister of Transportation, Postal Service and Telegraph in Nasib Yusifbeyli's fourth and fifth governments.

At that time, the "Socialist faction" nominated Hajinski for the post of Minister of Internal Affairs in the newly formed government.

Hajinski was arrested as part of a group of "eser" (socialists) on April 7, 1922, as a result of a special operation conducted by the Azerbaijan Cheka.

Hajinski returned to Baku after his release, and from July of the same year, he became the secretary and then the head of the Planning Department in the Azerbaijan Agricultural Cooperative Union ("Goybirliyi").