Job Title: 5G Senior System Integration and Test Engineer (5G RAN, Radio & Core)

Job Title : System Integration and Test Engineer

Location: Bangalore, KA

Employment Type : Contract

About the Role

We are 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.

Key Responsibilities

- 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.





Required Skills & Experience

- 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.

Positive 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.

Key Competencies 5G SA | RAN & Radio | 5G Core | System Integration | 3GPP | O-RAN | L1/L2/L3 Debugging | Protocol Analysis | Performance Testing | E2E Troubleshooting | Automation | Field Validation

📌 5G Senior System Integration and Test Engineer (5G RAN, Radio & Core) (Bengaluru)
🏢 Telcosvcs
📍 Bengaluru