Bobby Kostadinov began playing the cello at the age of seven. He initially received his training at the Johann Sebastian Bach Music School in Leipzig and at 16 became a junior student at the Leipzig university of music and theatre. There, he studied with Professor Peter Bruns from 2017 to 2024, graduating with top marks. He received artistic inspiration also from Claudio Bohórquez, Maximilian Hornung, Wen-Sinn Yang, Marc Coppey, Siegfried Pank, Boris Kuznezov, and others.

He is a multi-award-winning musician, having received over 60 first and second prizes at national and international competitions, as well as numerous other special awards. These include four first prizes at the german competition "Jugend musiziert" with the highest possible score as a soloist and chamber musician at the "Jugend Musiziert" competition, four consecutive first prizes at the "Musik aus Kommunen" competition, first prizes at the Gustav Mahler Cello Competition, the Fanny Mendelssohn Competition, the Brahms Competition, and the Gabriel Fauré Competition, and second prizes at the Carl Bechstein Competition, Allegra, and many others.