Ester performs as a soloist, chamber musician and in ensembles at various festivals throughout Europe, such as Ultima Oslo, Donaueschinger Tage für Neue Musik, Acht Brücken Köln, Musikfestival Bern, among others.
She is a member of the Améi Quartett, Trio uBu and Trio Radial and regularly plays with her piano partners Sophie Patey and Bernhard Ruchti. Her engagements include working with Ensemble MusikFabrik, Ensemble Modern, Ensemble recherche, Das Neue Ensemble Hannover, Ensemble Proton, Ensemble VIL Stuttgart, Experimentalstudio of the SWR, and many others.
She has received prizes and awards at competitions, including 1st prize at Kammermusikwettbewerb of Polytechnische Gesellschaft Frankfurt (2012 with Améi Quartett), 1st prize at Boris Pergamenschikow Chamber Music Competition in Berlin (2016 with Trio uBu). In collaboration with composer Sivia Rosani and visual artist Inês Rebelo, an interdisciplinary performance for cello and live electronics (White Mask) is currently being created.