Andrei Harabagiu began his musical studies at the Music High School "C. Porumbescu" in Chișinău, Moldova, under the guidance of Tamara Kaftanat. He later continued his studies at the "G. Verdi" Conservatory in Milan, where he was mentored by Daniele Gay (violin) and Claudio Pavolini (viola). As a member of the string quartet "Indaco," he delved into chamber music at the School of Music in Fiesole, Italy, under the guidance of Piero Farulli and Andrea Nannoni.

After settling in Switzerland, Andrei pursued a master's degree in music pedagogy at the Basel Music Academy, focusing on violin and viola under the guidance of Silvia Simionescu. He garnered awards in national and international competitions, both as a soloist and with the string quartet, including "Val Tidone" and "Laura Cremonesi" in Italy, and "Paul Costantinescu" in Romania.

Andrei made his solo debut with the National Philharmonic Orchestra of Chișinău and the Basel Symphony Orchestra. He participated in international festivals such as the "Festival dei due Mondi" in Spoleto, "Cully Classic" in Switzerland, and "Academia Sighisoara" in Romania, and performed in Armenia, Scotland, and Ireland.

Furthermore, he collaborated with the Ensemble for Contemporary Music at the Teatro alla Scala in Milan and continues to dedicate himself to chamber music, performing in Switzerland, Germany, and Italy. In the realm of education, Andrei taught at music schools in Aarau and Basel and served as a tutor for chamber music courses at the Basel Music Academy from 2011 to 2016.