Senior Core Network & Signaling Engineer

About the Role

Our client in the Telecom industry is seeking a highly experienced Core Network & Signaling Engineer to design, operate, and evolve the end-to-end MVNO core network, ensuring seamless interworking with multiple Mobile Network Operators (MNOs) and third-party service platforms.

This role requires deep, hands-on expertise in telecom core networks, signaling (SS7 / Diameter / SIP), voice and data services, and proven experience working within MNO environments. The successful candidate will be responsible for architecture, deployment, interconnectivity, troubleshooting, optimization, and regulatory compliance of the MVNO core infrastructure.

Key Responsibilities

Core Network Operations & Management

• Design, deploy, and maintain core network elements including HLR/HSS, MME, SGSN, GGSN, PGW, SGW, and IMS components
• Manage SIP-based voice services including VoLTE, VoWiFi, and traditional circuit-switched voice interconnections
• Configure and optimize signaling interfaces (Diameter, SS7/SIGTRAN, SIP/IMS) between MVNO core and host MNO networks
• Implement and maintain roaming agreements and interconnect configurations with partner networks

Network Interworking & Integration

• Lead technical integration projects with host MNO networks, ensuring proper MAP, Diameter, and SIP protocol implementations
• Configure and troubleshoot IPX/GRX connections for international roaming and signaling
• Manage relationships with host MNOs on technical matters including interface specifications, capacity planning, and service enablement
• Coordinate with vendors and partners on core network equipment and service delivery

Technical Support & Troubleshooting

• Perform advanced troubleshooting of core network issues including call setup failures, registration problems, and data session issues
• Lead incident response for major network outages and service-affecting events

Compensation & Location

Salary: N800,000 - N1,200,000 monthly

Location: Lagos, Nigeria