Orange Business is seeking a Senior Mobile Core Network Engineer to design, deploy, and support cutting‑edge 4G/5G core network solutions across its global portfolio. The role involves creating high‑level and low‑level designs, coordinating CI‑CD pipelines, and ensuring seamless integration in lab, pre‑production, and production environments. Candidates must possess deep expertise in LTE/5G architectures, 3GPP standards, and core network elements such as AMF, SMF, and UPF. Strong skills in functional, performance, and end‑to‑end testing, CI‑CD automation, and containerized deployments on RedHat OpenShift are essential. The position offers a hybrid work model, competitive compensation, and opportunities for continuous learning within a dynamic, multicultural team.