Pianist, composer and arranger, winner of many national and international competitions, the Fryderyk and the Polityka Passport awards. He is a co-founder and member of the Lutosławski Piano Duo and the Kwadrofonik quartet. Wąsik has performed in Europe, Asia and the Americas. At Carnegie Hall and the Chicago Symphony Hall, he presented his own arrangements of Fryderyk Chopin's works. At the Berlin Philharmonic, together with the Kwadrofonik, he performed his original arrangement of Igor Stravinsky's Rite of Spring and songs from the album Folklove - awarded the Folk Phonogram of the Year. His project Nowa Warszawa (recorded with Stanisława Celińska and the Royal String Quartet), featuring 12 newly arranged songs about Warsaw, was enthusiastically received by critics and honored with the Gwarancje Kultury and Wdechy awards. He has collaborated, among others, with Bartek Konopka (the film New Warsaw), Jan Komasa (the show Xenophony), Artur Rojek (Industrial Symphony), Adam Strug (Folk Requiem - awarded the Folk Phonogram of the Year), Katarzyna Nosowska, Ralph Kaminski and Dorota Miśkiewicz (Lutosławski, Tuwim – piosenki nie tylko dla dzieci [Lutosławski, Tuwim - Songs not only for Children] - the album obtained the Gold Record status) and the Stary Theater in Lublin (the project Kocham, Lublin, Szanuję recorded on DVD by FiNA). In 2020, together with Mela Koteluk, he composed songs for the album Astronomia poety. Baczyński [Astronomy of the poet. Baczyński].