IMS Engineer

Requirements

Must have:

- Strong IMS architecture knowledge (SIP, Diameter, VoLTE call flows) - Hands-on troubleshooting experience (Wireshark, traces) - Experience with LTE/5G Core integration - Proficient in Linux/Unix; Scripting (Python/Shell preferred) - Preferred experience with vendors like Ericsson, Nokia, Huawei - Exposure to UK operators such as Vodafone or BT Group - Knowledge of NFV/Cloud (OpenStack/Kubernetes)

Responsibilities:

- Manage and support IMS nodes (CSCF, HSS/UDM, SBC, TAS) - Troubleshoot SIP/Diameter call flows and perform root cause analysis (RCA) - Support VoLTE/VoWiFi service delivery and optimization - Handle L2/L3 incidents and ensure SLA adherence - Lead upgrades, integrations, and new service rollouts - Collaborate with RAN, Core, and vendor teams

Company:

We are seeking an IMS Engineer to join our team in Reading on a hybrid basis. In this role, you will be responsible for the design, integration, and support of IMS core networks enabling VoLTE/VoWiFi services. We value high availability and service performance and look forward to having you contribute to our mission.