Jobs in Johannesburg, Südafrika

Job title: Senior Engineer: Mobile Core Network

Job Location: Gauteng, Johannesburg

Deadline: May 03, 2025

Role Description

• Develop and design end-to-end 4G/5G core network solutions, with a focus on MOCN and roaming scenarios. Ensure scalability, reliability, and security in network designs. Collaborate with cross-functional teams to align network design with business requirements. Traffic model and Capacity Management is required to ensure that the network nodes and links are adequately sized. Number range management. E2E FWA solution design, including Provisioning, Charging, Mobile Data Core (4G/5G), and RAN.
• Deploy and integrate core network components, working closely with vendors and partners. Able to configure all components of the Mobile Core 4/5G network.
• Ensure seamless integration with other MNOs for national roaming on 4G/5G networks. Define and complete all integration testing with Provisioning, Charging, and RAN. Signalling Protocols: In-depth knowledge of key signalling protocols, including: 4G (LTE): S1AP, X2AP, GTP, Diameter, SCTP, SIP. 5G: NGAP, XnAP, HTTP/2, PFCP, SBI.
• Perform network performance analysis and optimization to enhance coverage, capacity, and quality of service. Implement optimization strategies for MOCN and roaming scenarios. Monitor network performance and troubleshoot issues to maintain optimal operation. Provide regular reporting of the whole network and the FWA Service. Review and report on network usage and customer usage.
• Stay updated with the latest advancements in MOCN and RAN technologies and standards. Implement MOCN on other MNOs' RAN infrastructure. Ensure proper configuration and management of shared RAN resources. Setting up the correct pooling and high availability configurations between the Mobile Core and RAN. Ensure seamless mobility between 4G/5G sites.
• Implement and manage IP networking protocols (BGP, OSPF, MPLS) to ensure efficient data flow. Configure and troubleshoot IP routers, switches, and firewalls. Ensure robust IP network design to support core network operations. Setting up of DNS servers including setting up authoritative and caching DNS servers. Customize solutions to meet specific requirements and resolve integration issues.
• Create technical documentation, including network diagrams and guidelines. Conduct training sessions for internal teams and customers. Maintain up-to-date records of network configurations and changes.

Requirements

• In-depth understanding of 4G and 5G core network technologies, including EPC, IMS, and telecom call flow/processes: Essential
• 5+ years of experience in designing and deploying mobile core network solutions, with a focus on MOCN and roaming scenarios: Essential
• Relevant certifications (e.g., CCNA, CCNP, 3GPP) are a plus: Desirable
• Strong problem-solving skills and ability to work in a fast-paced environment: Essential
• Maximum of 3 years' experience with network virtualization, NFV (Network Functions Virtualization), and cloud-native architectures: Essential
• Maximum of 3 years planning and configuration on Core Network Elements including all components of EPC and 5G Core: Essential
• Maximum of 3 years strong knowledge of Linux networking, including DPDK applications and SRIOV interfaces: Desirable
• Maximum of 2 years solution design and architecture: Desirable
• Maximum of 2 years vendor solutions and technologies: Desirable
• Maximum of 2 years project management, multiple project handling: Desirable
• Maximum of 2 years' service delivery and management: Desirable
• Maximum of 2 years creation of strategic technology plans: Desirable