Her music has been performed by groups such as Ensemble Musikfabrik, L'instant Donné, EXAUDI, Ensemble Mosaik, The Nieuw Ensemble, Apartment House, The London Sinfonietta, The BBC Scottish Symphony Orchestra, the SWR Vokalensemble and the Ives Ensemble. She has been programmed at events such as the Donaueschinger Musiktage, Venice Biennale, Huddersfield, SPOR Festival, Festival Reims Scènes d'Europe, Tuned City, Darmstadt, the Borealis and Ultima festivals in Norway and the Transit festival in Belgium.
Her recent work includes chamber music and installation, and is characterized by the use of field recordings together with acoustic instruments. She is also interested in the interplay between the audio and visual as evidenced by her works for camera obscura which include the installation The place you can see and hear and the music-theatre piece Analogue.
Together with composer Matthew Shlomowitz, Joanna is the founder and artistic director of Ensemble Plus-Minus, in May 2010 she was the guest curator at the SPOR Festival in Aarhus, Denmark and in September 2015 she curated and produced the Cut and Splice Festival for BBC Radio 3. She has taught composition at City University London, The Royal Academy of Music in Aarhus and at the 47th edition of the Darmstadt International Summer Course for New Music. In 2016 she was a guest of the DAAD Artists-in-Berlin-program.