Detailed JD is below:
Operate and support 5G Core (AMF/SMF/UPF/AUSF/UDM/PCF) and EPC nodes, including configuration, software upgrades, and fault restoration.
Perform endtoend Core troubleshooting using signaling traces for Registration, PDU Session Setup, Handover, and VoNR call flows.
Analyze key 5G Core KPIs: registration success, PDU session setup, drop rates, SM/AMF failures, UP throughput, latency, and user-plane integrity.
Execute the Core optimization process, including KPI baseline, RCA, corrective configuration changes, and postoptimization validation.
Debug interface-level issues across N1/N2/N3/N4/N7/N8/N10/N11 with protocol analysis tools (Wireshark, etc.,).
Manage interworking between EPC–5GC, including mobility anchors, ENDC procedures, and IMS/VoLTE/VoNR call scenarios.
Perform capacity and performance tuning across CP/UP functions, session load balancing, PFCP tuning, NF load, and throughput optimization
Ops experience with Core. Also CNF