PS Core Engineer

Overview The PS Core Engineer will be responsible for the design, configuration, optimization, and troubleshooting of Ericsson Packet Core solutions, including EPC, MME,5G Core. The role demands hands-on experience with Ericsson equipment and interfaces with planning, operations, and cross-functional engineering teams to ensure high availability and performance of mobile broadband services.Key Responsibilities■ Perform daily health checks and monitor alarms on Ericsson PS Core nodes (MME, EPG, PCC/PCG, SAPC, SMF/UPF, NEF ,ESOA, ..etc.).■ Troubleshoot and resolve network faults, capacity issues, and performance degradation.■ Manage subscriber sessions, PDP contexts, bearer handling, and IMSI tracing.■ Implement new APNs, IMSI ranges, rating groups, and QoS profiles.■ Configure PCC rules, PDR/QER/FAR/URR policies, and interface with PCRF/SAPC.■ Manage DNS/NAPTR/SRV configurations for IMS and EPC services.■ Support integration of new PS Core nodes (vEPG, vMME, vUPF on cloud/Kubernetes).■ Plan and implement software upgrades, patches, and capacity expansions.■ Analyze KPI trends (Attach success, bearer setup, handover success, latency, throughput).■ Develop and maintain scripts (Bash, Python, Expect, AWK) for log parsing, KPIs, and automation.Required Skills & Competencies■ Strong knowledge of Ericsson PS Core portfolio: SGSN-MME, EPG (GGSN/PGW/SGW), PCC/PCG, SAPC, DRA, SMF/UPF,NEF,ESOA.■ Understanding of 2G/3G/4G/5G call flows (Attach, TAU/RAU, Handover, Session Management).■ Protocols: GTP-C/U, Diameter, Radius, HTTP/2, SIP, SCTP, TCP/UDP/IP.■ Familiarity with virtualization (VMware, OpenStack, Kubernetes, Docker).■ Hands-on with Ericsson CLI (gsh, vshell, epg, pcc).■ Proficiency in OSS/BSS integration, NetAct, ENM, ENIQ, Wireshark.■ Strong analytical and problem-solving skills.■ Ability to work under pressure and handle high-priority incidents.■ Good communication and documentation skills for cross-team collaboration.Qualifications■ Bachelor’s degree in Telecommunications, Electronics, Computer Engineering, or related field.■ 4–8 years’ experience in PS Core / EPC / 5G Core networks (Ericsson preferred).■ Vendor certifications (Ericsson Certified Professional) are a plus.■ Knowledge of cloud-native 5G Core (dual-mode 5GC, CNIS, SMF/UPF integration) is an advantage.