He is credited with the introduction of the first electric lighting and the construction of the first Teslian polyphase hydroelectric power plants in Serbia.

In 1881, he graduated from the Grande école in Belgrade and Professor Kosta Alković kept him as an assistant trainee at the Department of Physics.

He remained in the position of assistant until 1883 when he passed the professor's exam in physics, mechanics and astronomy.

He is credited with the construction of the first hydroelectric power plants in Serbia: Užice on Đetinja (opened in 1900),[7] Vučje on Vučjanka (opened in 1903),[8] Niš on Nišava, Veliko Gradište on Pek, Vlasotince on Vlasina, Ivanjica on Moravica, Raška on Ibar, Zaječar on Timok and so on.

In early October 1893, Stanojević also constructed the first Belgrade hydrothermal power plant using Tesla's polyphase system in the district of Dorćol,[5] and he became the first person to send audio (wireless telephony) by means of electromagnetic waves (radio demonstration) in 1908 in Belgrade.

At that place, the waterfalls in several jumps, which are not far from each other and bear various names such as Dev Kazan, Djokin Vir, etc., from a height of more than 100 meters.

Stanojević was a proponent of universal education and critical of the Central Powers for targeting institutions of higher learning.