Orange Business is seeking a Senior Mobile Core Network Engineer to lead the design, deployment, and operation of 5G and 4G core networks. The role demands deep expertise in LTE/5G architectures, 3GPP standards, AMF/MME, SMF/SPGW-C, UPF/SPGW-U, and containerized Telco‑cloud deployments. Candidates will manage technical activities, supplier relationships, and support operations across global projects, ensuring high‑quality delivery within cost and time constraints. Fluency in English and a graduate degree in telecommunications or software engineering are required.