Technische Universität Berlin invites applications for a Postdoctoral Research Associate in Theoretical Physics focusing on active and nonreciprocal systems and open, driven quantum systems within the research groups of Prof. Klapp and Prof. Eckardt. The position involves theoretical and computational research supporting a planned collaborative project, including numerical modeling and interdisciplinary quantum systems studies. Responsibilities also include organizational project support and teaching assistance in theoretical physics courses. Applicants must hold a PhD in physics or a related field with strong theoretical background, numerical methods expertise, and programming skills. Experience in teaching and research project coordination is advantageous.