Core Network SME – Ericsson EPC & IMS (L2 Operations) StellarIT Solutions

Job DescriptionRoles & ResponsibilitiesJob Summary:We are seeking a highly skilled Core Network SME with hands-on experience in Ericsson EPC & IMS environments. The role involves managing, troubleshooting, and optimizing core network elements, ensuring high availability, performance, and seamless service delivery for LTE/5G networks. The candidate will play a key role in L2 operations, KPI monitoring, and incident resolution, along with supporting cloud-native core deployments.Key Responsibilities:Manage and support Ericsson EPC nodes (MME, SGW, PGW) and IMS components (CSCF, HSS, PCRF).Perform L2 operations support, including incident management, fault isolation, and root cause analysis (RCA).Monitor network KPIs and ensure SLA compliance through proactive performance management.Execute configuration changes, upgrades, and parameter tuning across core network elements.Troubleshoot VoLTE/VoNR call flows, including SIP and Diameter signaling issues.Conduct log analysis, trace collection, and protocol-level debugging for critical incidents.Handle capacity planning and traffic forecasting to ensure scalability and optimal utilization.Support virtualized and cloud-native core deployments using VMware, OpenStack, and Kubernetes.Collaborate with RAN, Transport, and vendor teams for end-to-end issue resolution.Maintain documentation, SOPs, and audit reports for operations and configurations.Required Skills & Qualifications:Strong experience with Ericsson EPC & IMS platforms.Good understanding of LTE/5G Core architecture and signaling flows.Hands-on expertise in Fault, Configuration, Performance, and Capacity Management.Knowledge of VoLTE/VoNR, SIP, Diameter, GTP, and IP networking.Experience with OSS/ENM tools, Wireshark, and monitoring systems.Familiarity with cloud and virtualization technologies (VMware, OpenStack, Kubernetes).Ability to handle L2 escalations and work with cross-functional teams.Strong analytical, troubleshooting, and communication skills.Preferred Qualifications:Experience in Ericsson core network environments (EPC/IMS).Exposure to 5G Core (5GC) and cloud-native architectures (CNF/VNF).Knowledge of automation/scripting (Shell, Python) is a plus.Experience:3–8+ years in Telecom Core Network (EPC/IMS Operations)