Core Network Engineer

1. Responsibilities

• Install, commission, and integrate Core Network elements (5GC / 4G EPC / IMS /CS) to ensure smooth network go-live;
• Perform routine maintenance, patrol, and fault handling on Core Network equipment; quickly identify and resolve anomalies to guarantee network stability;
• Support network planning, capacity expansion, upgrades, and cut-over activities; prepare and execute technical solutions;
• Coordinate integration and joint commissioning between Core Network and wireless, transport, and transmission domains; optimize network KPIs;
• Collaborate with local operator customers and R&D teams; collect and escalate network issues and optimization requirements;
• Produce technical documents, operation manuals, and maintenance reports; train local operation & maintenance teams to enhance local self-delivery capability;
• Comply with company quality and security standards and implement network security management requirements.

2. Requirements

Education

• Bachelor's degree or above in Telecommunications, Electronic Engineering, Computer Science, Network Engineering, or related fields.

Technical Skills

• Solid understanding of LTE / 5G NSA/SA core network architecture and principles; familiarity with 5GC (AMF/SMF/UPF/UDM/NRF) or EPC (MME/SGW/PGW), IMS, and NFV cloud-based deployment is a plus;
• Familiar with TCP/IP and signaling procedures (e.g., S1, NG, Diameter, SIP) with packet capture, signaling tracing, and protocol analysis capability;
• Proficient in using core network management/operation tools; strong troubleshooting and log-analysis ability;
• Basic knowledge of Linux OS and common command-line operations; virtualization/cloud fundamentals are a bonus.

Language

• Good command of English (spoken and written) as the working language for communication with customers and teams; local language proficiency is an advantage.

Experience

• 1+ years of related work experience in core network or telecommunications is preferred; outstanding fresh graduates are also welcome for development;
• Hands-on experience in core network delivery, integration, or maintenance projects with operators or equipment vendors is preferred.

<