Katarzyna Lassak is a Polish virtuoso violinist, a graduate of the Chopin University of Music in Warsaw (2020), where she received her Ph.D. degree with honours (2022) under the direction of Professor Janusz Wawrowski. She also studied under Professor Agata Szymczewska. She made a world premiere recording of the forgotten "Highlander" Violin Concerto No. 2 by Jan A. Maklakiewicz with the Polish Radio Orchestra, at the Witold Lutosławski Concert Studio. Katarzyna Lassak comes from a highlander family from Zakopane (Southern Poland, Tatra Mountains), which continues a multigenerational history of folklore music traditions. She is a lead violinist of the Lassak "Helios" Family. During her concerts, she often juxtaposes her interpretation of folklore-inspired classical music with traditional performances of Podhale music.

She has performed as a soloist with the symphony orchestras of the Karłowicz Philharmonic in Szczecin, Paderewski Pomeranian Philharmonic in Bydgoszcz, Kolberg Philharmonic in Kielce, Baird Philharmonic in Zielona Góra, the Gorzów Philharmonic, the Polish Philharmonic "Sinfonia Baltica" in Słupsk and the Polish Radio Orchestra in Warsaw, as well as the chamber orchestra Warsaw Players, Tatra Mood Orchestra and Atom String Quartet. She has worked with such conductors as Michał Klauza, Łukasz Borowicz, Paweł Kapuła, Przemysław Fiugajski, Norbert Twórczyński, Agnieszka Kreiner and Michał Krężlewski. She has performed at the international music festivals, including the String Festival "Masters of Polish Violin Playing", "Emanations", "Gaude Mater", "Musical Spaces", "Musical Gardens", and the Piotr Janowski Festival. She has played recitals at the ROMA Music Theater in Warsaw, the Karol Szymanowski Museum in the "Atma" villa in Zakopane, and the Presidential Palace, among others.

She is the winner of many competitions. At the age of 18, she won the "Let's Remember Osiecka" Vocal Competition. Throughout the last year, she won 10 first prizes at national and international competitions, including: Grand Prix "Sabała's Fiddle" for the best instrumentalist at the International Festival of Highlander Folklore, and the "Dziadońka's Bow" Honorary Award. She was a recipient of a scholarship from the Minister of Culture and National Heritage. In 2023, she was awarded the honorary title of "Wierchowa Orlica" (Mountain Eagle).