Core Network Engineer 5G

Core Network Engineer 5G – Job Number: 26-00605

Location:

Richardson, TX. Client: ECLARO’s leading technology solutions provider.

The Core Network Engineer (5G) works within the Engineering department and is responsible for the design, deployment, operation, and optimization of the client’s 5G core network platforms. The role focuses on hands‑on engineering execution, supporting both internal network operations and contracted wholesale customer deployments across U.S. and international environments. Innovation is delivered through practical improvements in automation, reliability, observability, and deployment efficiency rather than strategic product ownership.

• Design, deploy, operate, and maintain 5G Core Network (5GC) components including AMF, SMF, UPF, NRF, PCF, AUSF, and UDM across both SA and NSA deployments.
• Deploy, manage, and operate 5G core environments in high‑availability and geo‑redundant configurations, ensuring resilience, scalability, and service continuity.
• Support inter‑PLMN connectivity including roaming, SEPP, and secure interconnect architectures.
• Support mediation requirements for billing/charging and performance statistics on 5G core platform.
• Perform end‑to‑end call‑flow debugging and protocol‑level troubleshooting across N1, N2, N3, N4, N6, N10, N11, and N12 interfaces.
• Implement and support network slicing, policy control, and service function chaining.
• Ensure compliance with relevant 3
  
  GPP specifications, security requirements, and interface protocols (e.g. HTTP/2, PFCP, SCTP).
• Collaborate with RAN and infrastructure teams to support lab test‑cells and limited production radio deployments where required.
• Integrate, harden, and operate vendor‑supplied and open‑source 5G core solutions (e.g. Open5GS, free5GC, Magma) in test, pre‑production, and production environments.
• Contribute fixes, enhancements, and operational tooling where appropriate to support production stability and maintainability.
• Use automation to reduce Mean Time To Repair (MTTR), improve deployment repeatability, and increase operational visibility.
• Develop and maintain custom scripts and tooling (e.g. Python, Bash, Go) to automate deployment, configuration, testing, monitoring, and fault analysis.
• Provide technical input and peer review to pre‑sales and solution architecture activities, validating feasibility, integration complexity, and operational impact.
• Contribute implementation‑level considerations and constraints to High‑Level Design (HLD) documentation produced by Solution Architects.
• Execute assigned technical work streams within contracted wholesale customer projects, including deployment, integration, testing, and handover to operations.
• Provide Tier‑3 technical support to the Network Operations Centre (NOC) for live network incidents affecting wholesale and internal services, participate in escalation and support on‑call rotations as required.
• Conduct root‑cause analysis, document findings, and implement corrective and preventative actions.
• Continuously develop technical expertise across core network functions, infrastructure platforms, and emerging 3
  
  GPP features relevant to Client’s network roadmap.

• Bachelor’s or Master’s Degree in Computer Science or Engineering.
• Minimum of 5–8 years working in the telecommunications industry designing, integrating and managing mobile core network propositions for a network equipment provider or carrier/MNO.
• Deep understanding of 5G Core architecture (SA/NSA), 3
  
  GPP specs, and control/user plane functions.
• Experience with open source 5G cores like Open5GS, free5GC, or Magma; experience with Mongo database for open‑source 5G solutions is a plus.
• Programming in at least one of the following languages: C, Python, Golang, Bash, or equivalent.
• Familiarity with containerization (Docker, Kubernetes), Git, and CI/CD tools.
• Hands‑on experience with Wireshark, PCAP analysis, and log‑level debugging.
• Minimum of five years of systems integration, management, and/or technical support of 4G/LTE and 5G mobile core network components.
• In‑depth knowledge of mobile voice and data core network architecture (including MNO/MVNO/MVNE infrastructure…