CS Core Engineer

Job Summary

We are seeking a CS Core / IMS / SVC Engineer to support, operate, and evolve mobile core networks. The role covers CS, IMS, and SVC solutions , with responsibilities and technical depth aligned to the candidates experience level. Engineers will work in live network environments, ensuring service availability, performance, and continuous improvement.

Core Network Knowledge

• Understand the basic structure of mobile communication networks
• Knowledge of CS / SVC solutions or IMS / SBC services with basic configuration capabilities

Signaling & Protocols

• Basic knowledge of SS7 , M3UA , signaling link configuration, and GT routing
• Familiarity with ISUP, BICC, SIP
• Understanding of mobility control protocols:
• BSSAP, RANAP, MAP, CAP
• General knowledge of SIP, SDP, DIAMETER, DNS, ENUM

Mobility & Subscriber Concepts

• Understanding of authentication and encryption mechanisms
• Knowledge of LAI, LAC, cell, service area, paging, roaming, handover, STN-SR
• Ability to check subscriber profiles in HSS and understand basic subscriber parameters

Operations & Support

• Perform L1 health checks and maintain operational scripts
• Monitor network performance, system logs, and capacity
• Enable traces and support basic call troubleshooting
• Provide first-line technical support for CS/IMS core network elements