Eszter Zemlényi graduated from the Ferenc Liszt Academy of Music in 2013 after studying oratorio and art song singing under Katalin Halmai. She started working with voice teacher Ingrid Kertesi in 2016. She has won numerous honours, including winning the Zoltán Kodály Special Prize at the First National József Gregor Singing Competition, the Annie Fischer Scholarship for Performing Artists in 2016, as well as winning a special prize at the József Simándy International Singing Competition and first place at the Emil Perovics Singing Competition. Since 2008, she has regularly appeared in performances of operas and oratorios in Hungary. She has performed in concert with such ensembles as the Budapest Festival Orchestra, the Orfeo Orchestra, the MÁV Symphony Orchestra, Concerto Budapest and the Mendelssohn Chamber Orchestra, and she has also made her debut at the Budapest Spring Festival and the Eszterházi Festivities. She regularly helps develop contemporary music in Hungary, in addition to popularising modern Hungarian music with concert tours of Sweden and Transylvania. Apart from singing oratorios and art songs, she has also tested her mettle in the genres of opera and singspiel, following up later with the roles of Blonde (Die Entführung aus dem Serail), Pamina (Die Zauberflöte), Nannetta (Falstaff), Marie Louise (Háry János) and Bastienne (Bastien und Bastienne) by making her Müpa Budapest debut as Damigella (L'incoronazione di Poppea). She made her debut at the Hungarian State Opera House in 2016, in the role of Blonde.