Aleksandra Kornowicz graduated with distinction from the Fryderyk Chopin University of Music in Warsaw in the violin class of Jakub Jakowicz and Roksana Kwaśnikowska. She is currently a student at the University of Music and Performing Arts Graz, majoring in Performance Practice in Contemporary Music, run by the Klangforum Wien.

She honed her skills under the guidance of virtuosos such as Augustin Dumay, Jan Stanienda, Robert Szreder, Edward Zienkowski, Christian Altenburger, Ernst Kovacic, Sebastian Hamann, Elisabeth Glab, Szymon Krzeszowiec, Janusz Wawrowski, and Mariusz Patyra.

She has performed at international music festivals, including: in Shanghai – New Music Week, Lviv – Contrasts, Cologne – Acht Brücken, Graz – Musikprotokoll, Impuls Festival, Salzburg – Salzburger Festspiele, Paris, Bled, Krakow, Lublin, and Warsaw, including the International Festival of Contemporary Music “Warsaw Autumn.” She has given concerts in such venues as the National Philharmonic in Warsaw, the Witold Lutosławski Polish Radio Concert Studio, the Shangyin Opera House in Shanghai, the Lviv Philharmonic, and the Ballroom of the Royal Castle in Warsaw. As a soloist, she has performed with orchestras such as the Lviv National Philharmonic Orchestra – under the baton of Vincent Kozlovsky, the Shanghai Symphony Orchestra – under the baton of Shinik Hahn, and the Symphony Orchestra of the Fryderyk Chopin University of Music under the baton of Jacek Rogala. She has collaborated with outstanding artists such as Jan Stanienda, Jakub Jakowicz, Jakob Kullberg, Cameron Shahbazi, Klaudiusz Baran, Pia Davila, and Roksana Kwaśnikowska. She regularly collaborates with the Klangforum Wien ensemble, with whom she performed four concerts at the Salzburger Festspiele 2025.

Aleksandra Kornowicz is interested in performing 20th- and 21st-century works and new music in its broadest sense. Her repertoire includes works by Luciano Berio, Iannis Xenakis, Helmut Lachenmann, Pierre Boulez, Arnold Schönberg, Georg Crumb, Isang Yun, Simon Steen-Andersen, Krzysztof Penderecki, and Witold Lutosławski, among others. From 2019 to 2024, she was a member of the Chopin University Modern Ensemble, with which she gave approximately 30 premieres. From 2020 to 2024, she was a member of the German Music Council project and the International Festival of Contemporary Music "Warsaw Autumn" – European Workshop for Contemporary Music, conducted by Rüdiger Bohn. During the ensemble's concerts, she had the opportunity to collaborate with artists from Ensemble Musikfabrik and Ensemble Recherche.

She is a laureate of national and international competitions, both solo (including 2nd Prize at the 6th Odin International Music Competition in Estonia, 1st Prize at the Festival 4 Arts in Romania, 2nd Prize at the ISCART International Music Competition in Switzerland) and chamber music (including 2nd Prize and a special award for the best performance of a work by Juliusz Zarębski at the 20th International Juliusz Zarębski Competition, 3rd Prize at the 3rd Opus International Music Competition). In a duet with pianist Szymon Drabiński, she recorded the album "101 Years of the Life of Sonata" in 2022, featuring five Polish sonatas for violin and piano (works by Karol Szymanowski, Mieczysław Weinberg, Eugeniusz Knapik, Jerzy Kornowicz, and Aleksander Nowak).

Aleksandra Kornowicz is a scholarship holder of the Rector of the Fryderyk Chopin University of Music, a recipient of the Société Générale Bank Award 2022, a Witold Lutosławski scholarship, and a "Young Poland" 2025 scholarship from the Minister of Culture and National Heritage.