Back Office PS Core Engineer

The Back Office PS Core Engineer will be responsible for the configuration, optimization, integration, monitoring, and troubleshooting of Packet Core networks, including EPC and 5G Core solutions. The role requires strong hands-on technical expertise in mobile Packet Core technologies and the ability to work closely with planning, operations, NOC, and other engineering teams to ensure high availability, reliability, and performance of mobile broadband services.

Key Responsibilities

• Perform daily health checks and monitor alarms across PS Core network elements, including MME, EPG, PCC/PCG, SAPC, SMF/UPF, NEF, ESOA, and related nodes.
• Troubleshoot and resolve network faults, capacity issues, service-impacting incidents, and performance degradation.
• Manage subscriber sessions, PDP contexts, bearer handling, and IMSI tracing.
• Implement and configure new APNs, IMSI ranges, rating groups, and QoS profiles.
• Configure PCC rules and PDR/QER/FAR/URR policies and support integration with PCRF/SAPC.
• Manage DNS, NAPTR, and SRV configurations for IMS and EPC services.
• Support the integration and commissioning of new PS Core nodes, including virtualized EPG, MME, and UPF platforms deployed in cloud and Kubernetes environments.
• Plan and implement software upgrades, patches, configuration changes, and capacity expansions.
• Analyze network KPI trends, including attach success, bearer setup, handover success, latency, throughput, and session performance.
• Develop and maintain scripts using Bash, Python, Expect, AWK, or similar tools for log analysis, KPI monitoring, troubleshooting, and automation.
• Support incident management and provide technical assistance during high-priority network incidents.
• Coordinate with NOC, RAN, Transport, IMS, IT, and other engineering teams to resolve complex technical issues.
• Prepare technical reports, troubleshooting documents, configuration records, and operational procedures.
• Participate in network optimization and continuous service improvement activities.

Required Skills & Competencies

• Strong knowledge of PS Core technologies, including SGSN/MME, EPG (GGSN/PGW/SGW), PCC/PCG, SAPC, DRA, SMF/UPF, NEF, ESOA, and related network functions.
• Strong understanding of 2G/3G/4G/5G call flows, including Attach, TAU/RAU, Handover, Session Establishment, and Session Management.
• Strong knowledge of telecommunications protocols, including:
  • GTP-C/U
  • Diameter
  • RADIUS
  • HTTP/2
  • SIP
  • SCTP
  • TCP/UDP/IP
• Familiarity with virtualization and cloud technologies, including VMware, OpenStack, Kubernetes, and Docker.
• Hands-on experience with PS Core CLI and configuration environments.
• Experience with OSS/BSS integration and network management platforms.
• Proficiency with network monitoring and troubleshooting tools such as ENM, NetAct, ENIQ, Wireshark, or equivalent platforms.
• Strong analytical and problem-solving skills.
• Ability to work under pressure and manage high-priority incidents within agreed SLA requirements.
• Good communication, coordination, and technical documentation skills.
• Ability to work effectively with cross-functional and multi-vendor engineering teams.

Qualifications & Experience

• Bachelor’s degree in Telecommunications, Electronics, Computer Engineering, or a related field.
• 4–8 years of relevant experience in PS Core, EPC, or 5G Core networks.
• Hands-on experience with Packet Core operations, configuration, troubleshooting, optimization, and integration.
• Experience working with major telecom vendor Packet Core solutions is preferred.
• Relevant vendor certifications in Packet Core or telecommunications technologies are an advantage.
• Knowledge of cloud-native 5G Core, including dual-mode 5GC, CNIS, SMF/UPF integration, containerized network functions, and Kubernetes-based deployments, is an advantage.