As a contemporary composer, he has founded four different musical projects, including compositions for a symphony orchestra, rock drums, and piano.

[3] During his years at the Academy of Music, Havasi won first prize at a piano competition of Yamaha Foundation of Europe.

[9] The production featured nearly 100 artists, Dohnányi Symphony Orchestra and Budapest Academic Choir Society, together with almost 20 soloists of world music.

[9] At the premiere Havasi hit the same piano key 498 times in a single minute, surpassing the previous world record of 200.

As a part of his performances, he has collaborated with artists including Lisa Gerrard, Lebo M,[11] Karl Jenkins,[12] Leona Lewis,[13] Ronan Keating,[14] and Youssou N'Dour.

Led by Havasi, European and Hungarian musicians gave a joint artistic performance with Yunnan Art Group from China.

[citation needed] At a series of four concerts held at Papp Laszlo Sports Arena in Budapest around this time, he performed in front of an audience of 46,000 people.

[citation needed] In 2021 Havasi made his North American debut of his Symphonic Concert Show, and became the first Eastern-European artist to sell out the Hard Rock Live in Hollywood, Florida.

[citation needed] On May 8th, 2023 the HAVASI production held a symphonic show in the Royal Albert Hall.

It marked the first time that a Hungarian composer presented an entire concert of his original compositions at Royal Albert Hall.