Core Network and IP Engineer (MVNO)

Job Description

Lebara Nigeria – Beyond top-tier telecommunications, we have forged strategic partnerships to offer financial services designed to empower the creative industry. Through microloans, device funding, Lebara powered internet hubs, and culture-shaping events to boost the art, culture, tourism and creative economy. we are committed to driving innovation, inclusion, and economic growth.

We are recruiting to fill the position below:

Job Title: Core Network and IP Engineer (MVNO)

Location: Lagos
Job Type: Full-time
Department: Network Technology
Reports To: Core Network and VAS Manager

Role Summary

• The Core Network and IP Engineer will be responsible for the design, deployment, integration, and operations of the MVNO core network and IP infrastructure.
• This role ensures seamless interoperability between the MVNO Core, OSS/BSS platforms, and the host MNO networks while maintaining high availability, scalability, and security of services.

Key Responsibilities
Core Network Responsibilities:

• Design, deploy, and operate MVNO Core Network elements, including:
• HSS/HLR
• PCRF/PCF
• IMS (CSCF, SBC, MGW, TAS, MMTel)
• EPC/5GC elements (MME, SGW, PGW, UPF, AMF, SMF, UDM, AUSF)
• Integrate with host MNO’s RAN and interconnect with roaming partners.
• Perform interoperability testing (IOT) with multiple MNOs (2G/3G/4G/5G NSA/SA).
• Ensure QoS, policy enforcement, lawful interception, and number portability.
• Support VoLTE, VoWiFi, and traditional CS fallback services.
• Manage signaling protocols: Diameter, SIP, SS7, MAP, CAMEL, GTP, SCTP, etc.

IP Network Responsibilities:

• Design, deploy, and maintain IP/MPLS backbone and transport infrastructure for MVNO services.
• Configure and optimize routing (BGP, OSPF, IS-IS) and switching.
• Manage IP address plans, NAT, CG-NAT, and DNS/DHCP platforms.
• Ensure IP capacity planning, redundancy, and resiliency.
• Implement and manage IP interconnects (peering, transit, IXP).
• Integrate IP/MPLS transport with MVNO Core and Data Centers.

Security & Compliance:

• Deploy and manage firewalls, SBC, DDoS protection, and IPS/IDS systems.
• Enforce IPsec/MPLS VPNs for secure MNO interconnection.
• Support regulatory compliance: lawful interception, emergency calling, data retention.
• Work closely with the IP & Security team to safeguard signaling and IP networks.

Operations & Support:

• Provide 2nd/3rd line support for Core and IP issues.
• Troubleshoot network performance, call flows, and subscriber experience issues.
• Participate in change management and release planning.
• Maintain documentation (HLD, LLD, SOPs, configurations, as-built).
• Train and support NOC teams for monitoring and fault management.

Qualifications & Skills

• Education: Bachelor’s Degree in Telecommunications, Computer Science, or related field.
• 5 – 8 years of experience in Core Network engineering in MNO/MVNO/MVNE environments.
• Hands-on experience with EPC/5GC, IMS, HSS, PCRF, MGW, SBC.
• Strong knowledge of IP networking: IPv4/IPv6, MPLS, VPNs, BGP, OSPF, QoS.
• Proficiency in signaling: SIP, Diameter, SS7, CAMEL, GTP, SCTP.
• Experience with VoLTE/VoWiFi, 5G SA/NSA, and roaming platforms.
• Vendor experience (Ericsson, Nokia, Huawei, ZTE, Cisco, Juniper, Mavenir, Affirmed, Open5GS, etc.).
• Familiarity with virtualization/cloud platforms (VMware, OpenStack, Kubernetes).
• Strong troubleshooting and packet analysis (Wireshark, tcpdump).

Key Competencies:

• Analytical problem-solving and root cause analysis.
• Ability to work in multi-vendor, multi-MNO environments.
• Strong communication for cross-functional coordination with OSS/BSS, IT, and regulatory teams.
• Documentation and technical writing skills.
• Flexibility to work in 24×7 operations environment when required.

Application Closing Date
Not Specified.

How to Apply
Interested and qualified candidates should send their Resume to: youbelong@lebara.ng using the Job Title as the subject of the email.