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Job Description
Job Title: IMS Engineer
Location: Reading (Hybrid)
Role Overview
Responsible for design, integration, and support of IMS core networks enabling VoLTE/VoWiFi services, ensuring high availability and service performance.
Key Responsibilities
- Manage and support IMS nodes (CSCF, HSS/UDM, SBC, TAS)
- Troubleshoot SIP/Diameter call flows and perform 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
Required Skills
- Strong IMS architecture knowledge (SIP, Diameter, VoLTE call flows)
- Hands-on troubleshooting (Wireshark, traces)
- Experience with LTE/5G Core integration
- 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)
