Kostis started classical piano lessons at the age of 5, under the supervision of Despina Stefanidou, an established piano teacher in Athens. He received both his Piano Degree and Piano Virtuosity Diploma with Honours. Whilst Kostis was studying classical piano, he started becoming involved with contemporary and jazz music and, at the age of 13, started jazz piano and contemporary harmony lessons with Petros Chatzigeorgiou, an established soloist, composer and musical director in Greece. While continuing his piano studies, Kostis had lessons of baroque (fugue & counterpoint), classical and contemporary harmony, all resulting in degrees with Honors.
After receiving his Classical Harmony, Fugue, and Counterpoint degrees with honours, Kostis began studying contemporary composition, supervised by the composer Stathis Oulkeroglou in Athens. He became familiar with the 12-note system, and composed several solo pieces for flute & piano. In 2009 he was offered a place in the Masters course in Film & TV composition at the University of Bristol. Under the supervision of William Goodchild and Martin Kiszko he completed his Masters with distinction, studying Film Analysis, Media Composition, Electronic/Studio Composition, Orchestration and Instrumentation, along with Advanced Acoustic Composing Techniques taught by one of the leading contemporary composers in Europe, John Pickard.
Kostis became familiar with percussion instruments relatively early in his life, while listening to his father playing the drums day and night in his childhood home in Athens. He started playing drums at the age of 7 “playing along” with CDs of Beatles, Led Zeppelin, Pink Floyd, TOTO and Chris Rea. Although mainly a pianist, his early jobs as a session musician required him to perform drums and other percussion around Greece. This fact played a major role in Kostis’s compositional character, employing a variety of rhythmic and polyrhythmic elements in his concert and film music, dominated by percussive sounds and patterns.