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)