The University of Luxembourg is seeking a Postdoctoral Researcher in Quantum Networking to join the Signal Processing and Communications (SigCom) research group at the Interdisciplinary Centre for Security, Reliability and Trust (SnT). The university is renowned for its international, multilingual, and interdisciplinary environment, and the SnT centre is a leader in secure, reliable, and trustworthy ICT systems and services. The SigCom group, led by Professor Symeon Chatzinotas, specializes in wireless and satellite communications, with a strong focus on the formulation, modeling, design, and analysis of future 6G communication networks. Research areas include quantum communications, quantum information networks, software-defined networking (SDN), network function virtualization (NFV), and the integration of classical and quantum networks. The successful candidate will play a leading role in developing Key Management System (KMS) software for orchestrating Quantum Key Distribution (QKD) networks and implementing SDN-based frameworks to enable the quantum internet. Responsibilities include developing quantum communication protocols, designing quantum network architectures, building SDN-enabled orchestration software, and supporting PhD candidates in their research. The position is highly collaborative, involving work with academic and industry partners across several European and international projects. Applicants should have a PhD in Computer Science, Electrical Engineering, or Quantum Technologies, with expertise in SDN, software engineering, and quantum communication technologies. Strong coding skills in languages such as C/C++, Python, Java, Go, or Rust are required, along with experience in orchestration tools for complex networks. English fluency is mandatory. The position offers a fixed-term contract of 24 months, with a yearly gross salary of EUR 85,176, and access to state-of-the-art facilities and labs. The university values diversity and inclusion, and encourages early applications through its online HR system. The role is based at the Kirchberg Campus in Luxembourg, providing a modern and dynamic research environment with close ties to industry and society.