Key Responsibilities:

• Perform daily health checks and monitor alarms on PS Core nodes (MME, SGSN, GGSN, EPG, DNS/PCC/PCG, SAPC, SMF/UPF).
• 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 PS Core portfolio: SGSN-MME, EPG (GGSN/PGW/SGW), PCC/PCG, SAPC, DRA, SMF/UPF.
• Understanding of 2G/3G/4G/5G call flows (Attach, TAU/RAU, Handover, Session Management).
• Proficient in protocols: GTP-C/U, Diameter, Radius, HTTP/2, SIP, SCTP, TCP/UDP/IP.
• Familiarity with virtualization technologies (VMware, OpenStack, Kubernetes, Docker).
• Hands-on experience with 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 manage high-priority incidents.
• Excellent communication and documentation skills for effective cross-team collaboration.

Skills

Qualifications:

• Bachelors degree in Telecommunications, Electronics, Computer Engineering, or a related field.
• 4–8 years of experience in PS Core / EPC / 5G Core networks .
• Knowledge of cloud-native 5G Core (dual-mode 5GC, CNIS, SMF/UPF integration) is an advantage.