Senior Specialist

Infinite Computer Solutions·Noida

Pay not statedMid levelFull-time

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About the role

The L3 IMS/CS Core Expert is responsible for advanced troubleshooting, performance optimization, and end-to-end support of IMS and Circuit Switched (CS) Core network elements. The role involves handling complex issues escalated from L1/L2 teams, ensuring service continuity, and providing expertise for incident, problem, and change management.

What you'll do

Provide advanced troubleshooting for IMS and CS Core issues (VoLTE, VoWiFi, MO/MT call failures, SMS failures, Handover failures)
Analyze call traces (SIP, Diameter, ISUP, MAP, CAP) and perform deep-dive RCA
Support high-severity (P1/P2) incidents and ensure timely resolution
Handle escalations from Tier-1/2 NOC for CS/IMS nodes (MSC/MSC-S, MGW, HLR/HSS, STP, MTAS, CSCF, SBG, ENUM, DRA, IBCF/TrGW)
Handle SIP registration issues, VoLTE attach failures, IMS bearer issues, and interworking problems