Joanna Bednarczyk is a humanities graduate from the Jagiellonian University in Kraków, where she earned a degree in psychology and Russian philology. She also graduated from the Faculty of Theater Directing at the Academy of Theater Arts in Kraków. Since 2014 she has been working as a playwright with the Polish director Paweł Miśkiewicz. Together they staged the plays Idiot (National Theater, Warsaw), Ości (Soho Theater, Warsaw), Sturm (National Theater, Warsaw), Gulliver's Travels (National Stary Theater, Kraków), Serotonin (Studio Theater, Warsaw), Tirza ( Współczesny Theater, Wroclaw) or Demons (National Stary Theater, Kraków).
As a playwright, she also worked with Ewelina Marciniak on the Maid of Orleans at the Nationaltheater Mannheim - the production was invited to the Berlin Theatertreffen 2022. She is the author of the dramas Respublica directed by Łukasz Twarkowski (Lithuanian National Drama Theatre, Vilnius, in co-production with the Munich Kammerspiele) and Transformations staged in collaboration with Michał Borczuch (Studio Theater, Warsaw; Polish Theater, Bydgoszcz). In 2021 she directed the play Kordian and Cham at the Polish Theater in Poznań, which she adapted for the stage after Leon Kruczkowski.