He was one of the founders of the Democratic Party and a prominent presenter on RTV Studio B, which he co-founded.

[1] In his early career, Janković was a swimming coach and a disc jockey at the "Crveno i crno" (Red and black) club in Belgrade.

[1] He later began working as a journalist, founding the Studio B radio and television broadcaster in 1970.

[2] He was the author and host of various radio shows, such as Od doručka do ručka (From breakfast to lunch), Pingvin and Index.

[1][2] Beginning in 1979, he hosted Pop Ekspres, a music show, on Yugoslav Radio Television.

[6] In 2014, Janković accepted the proposal to become Dveri's mayoral candidate in the 2014 Belgrade City Assembly election.