Core Network Engineer(5G/IMS/UDM)

  • Frisco, TX
  • Posted 11 hours ago | Updated 11 hours ago

Overview

Hybrid
Depends on Experience
Contract - W2
Contract - 12 Month(s)

Skills

HTTP
SIP
Python
Network

Job Details

We are seeking a Core Network Engineer with strong expertise in 5G Core, IMS, and Subscriber Data Management (UDM/HSS/HLR). The engineer will be responsible for deployment, integration, upgrades, and testing of core network elements, ensuring seamless operations and protocol compliance.

  • Deploy, integrate, and configure UDM, HSS, and HLR in cloud-native environments (OpenStack, OpenShift, Kubernetes).

  • Perform upgrade activities, health checks, and validations on core network elements.

  • Execute Acceptance Test Procedures (ATP) and validate E2E test cases with focus on Diameter, LDAP, HTTP2, and SIP protocols.

  • Support subscriber provisioning flows and handle Change Requests (CRs) for SDM/IMS nodes.

  • Collaborate with production teams to manage deployments, integrations, and upgrades.

  • Monitor KPI, Fault Management (FM), and Performance Management (PM) data via northbound interfaces.

  • Troubleshoot issues by reproducing in lab environments, collecting traces (tcpdump/Wireshark), and analyzing logs.

  • Support 5G IMS product implementation, validating interfaces and protocol compliance.

  • Provide documentation, RCA, and technical support to ensure smooth rollouts.

Required Skills:

  • 5+ years experience with Telecom Core Networks (HSS, HLR, UDM, SDM, IMS, 5G Core).

  • Strong knowledge of telecom protocols: Diameter, LDAP, HTTP2, SIP, SCTP.

  • Experience with E2E and ATP testing, troubleshooting, and RCA.

  • Hands-on experience with OpenStack/OpenShift/Kubernetes environments.

  • Familiarity with network monitoring tools (tcpdump, Wireshark, NetScout).

  • Strong analytical, problem-solving, and documentation skills.

  • Good communication and client-facing skills.

Nice to Have:

  • Exposure to CI/CD automation for deployments.

  • Basic scripting (Python, Shell) for automation.

  • Knowledge of 5G IMS and VoLTE/VoNR testing.

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