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# 5G Senior System Integration and Test Engineer (5G RAN, Radio & Core)

- **Company:** Medley Networks Inc
- **Location:** San Diego, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Bash Shell, Beamforming, Software Debugging, Linux, Interoperability, Traceroute, Python (Programming Language), Pcap, Shell Script, System Integration Testing, System Testing, Systems Integration, Test Execution Engine, Wireshark, O-RAN, 5G NR, Grafana, Containerization, Kubernetes, Information Technology, Low Latency, Stream Control Transmission Protocol
- **Published:** October 30, 2026
- **Apply:** https://www.careerboard.com/us/en/find-jobs-in-United-States/-960D2C85297A7ADC25/

## About the Role

* Bachelor's or master's degree in Electronics & Communication, Computer Science, Telecommunications, or a related field.
 * 9-15 years of experience in wireless RAN/Core integration, system testing, and validation, including 4+ years of hands-on 5G integration and validation.
 * Strong knowledge of 3GPP NR protocols and procedures, including RRC, PDCP, RLC, MAC, PHY, NGAP, XnAP, and F1AP.
 * Strong understanding of 5G Core architecture and procedures, including AMF, SMF, UPF, registration, PDU sessions, mobility, QoS, and slicing.
 * Good understanding of 5G Radio/PHY, including modulation, MIMO/rank adaptation, TDD configurations, beamforming, and CSI reporting.
 * Strong end-to-end debugging and root-cause analysis skills across RAN, Radio, and Core.
 * Hands-on experience with QXDM/QCAT, Wireshark, PCAP analysis, protocol traces, and system logs.
 * Experience with iPerf, ping/traceroute, Keysight simulators, TM500, Amarisoft, and Grafana.
 * Experience with Linux, Shell scripting, Kubernetes, and containerized deployments.
 * Hands-on experience with lab equipment such as servers, attenuators, shielded boxes, RRUs, and test UEs.
 * Ability to read and interpret relevant 3GPP specifications, including TS 38.331, TS 38.413, TS 23.501 and related specifications.

Good to Have

 * Experience with O-RAN and multi-vendor integration.
 * Hands-on experience with MU-MIMO and industrial 5G/URLLC use cases.
 * Experience with CU/DU containerized deployments using Kubernetes.
 * Python/Bash automation for test execution, log collection, and analysis.
 * Experience with automated regression frameworks, CI/CD pipelines, and cloud-based NMS/EMS platforms.

## Description

XCOM Labs is seeking an experienced System Integration and Test (SIT) Engineer/Senior Engineer with strong hands-on expertise in 5G end-to-end system integration and validation across RAN, Radio, and 5G Core domains.

The role involves test planning, system-level integration and feature validation, end-to-end troubleshooting, performance characterization, and ensuring product readiness for deployment in lab and field environments., * Design, develop, and own end-to-end test plans for 5G SA integration, regression, feature validation, and characterization.

 * Execute System Integration Testing (SIT) across 5G NR gNB, RAN, Radio, and 5G Core components.
 * Validate end-to-end 5G call flows, including UE registration/deregistration, PDU session establishment/release, handover, and QoS flows.
 * Perform L1/L2/L3 debugging across PHY, MAC, RLC, PDCP, RRC, F1AP, NGAP, and XnAP.
 * Validate radio and system performance, including DL/UL throughput, MCS adaptation, SU/MU-MIMO, beamforming, rank adaptation, latency, and stability.
 * Test O-RAN architectures, including 7.2x split and CU-DU-RU integration.
 * Analyze PCAPs, QXDM/QCAT logs, protocol traces, L2/L3 logs, OAM counters, and Grafana KPIs to identify and root-cause issues.
 * Troubleshoot SCTP, NGAP, and GTP-U connectivity and protocol issues across gNB and 5G Core components.
 * Validate QoS, network slicing, and policy enforcement.
 * Conduct throughput benchmarking, latency, stress, endurance, and stability testing.
 * Collaborate with development teams to reproduce, isolate, track, and resolve defects.
 * Support field deployment, interoperability, integration, and characterization activities.