The Senior Mobile Core Network Engineer will lead the design, deployment, and operation of Orange Business’s mobile core network infrastructure, ensuring seamless integration with 5G CNaaS and IoT services. This role demands deep expertise in LTE/5G architectures, 3GPP standards, and containerized Telco cloud deployments, coupled with strong CI‑CD, testing, and security skills. The engineer will coordinate technical activities, manage supplier relationships, and prioritize tasks in a 24/7 shift environment, while fostering collaboration across multi‑national teams. Fluency in English and a graduate degree in telecommunications or software engineering are required.