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Staff Engineer

Tejas Networks
Bengaluru, IND
Full-time
Senior
Onsite
Discovered 3 weeks ago
linuxpython

Full Job Posting

Qualifications

  • Experience: 11 to 14 yrs+ years of experience in Wireless Communications, LTE, and 5G NR technologies
  • Education: B.Tech/BE (CSE/ECE) or any other equivalent degree

Responsibilities

  • Own system integration and validation activities for 4G/5G RAN products and solutions.
  • Lead integration of Firmware (FW), FPGA, Layer 1, Layer 2, Layer 3, and OAM components to enable Integrated SW build for required feature bring-up and product verification.
  • Review product requirements and derive integration and validation scope for feature and maintenance releases.
  • Perform end-to-end testing of features: LTE and NR features including Carrier Aggregation, MIMO, VoLTE, EN-DC, and mobility scenarios, etc.
  • Analyze protocol logs, KPI data, and system traces to identify and resolve defects.
  • Work closely with development, architecture, product management, and customer support teams for issue resolution and feature acceptance.
  • Define SIT test strategies, test plans, and validation methodologies for new product releases.
  • Lead root cause analysis and provide technical guidance for complex integration issues.
  • Contribute to test automation, continuous integration, and quality improvement initiatives.
  • Support customer trials, field testing, and production deployment activities.
  • Drive continuous improvement in system integration processes, tools, and development infrastructure.
  • Mandatory Skills:
  • Working in 4G/5G eNB/gNB product with strong involvement in integrating L1,L2,L3 & OAM components as a SIT feature/maintenance release.
  • Strong understanding of RAN architecture and LTE/NR Layer 1, Layer 2, and Layer 3 protocols.
  • Hands-on experience in system integration, feature validation, and troubleshooting.
  • Strong Knowledge in LTE/NR call flows, mobility procedures, and performance optimization.
  • Experience with FAPI-based integrations, front-haul debugging, and O-RAN interfaces.
  • Experience with protocol analyzers, network tracing, and log analysis tools.
  • Strong expertise in debugging system-level DL and UL timing issues across DU, RU, and UE interfaces, including synchronization, scheduling, HARQ timing, frame alignment, latency analysis, and front-haul timing-related anomalies.
  • Hands-on experience in analyzing and resolving LTE/5G NR timing issues using protocol logs, FAPI traces, Layer 1 logs, OTA captures, and O-RAN/eCPRI front-haul diagnostics.
  • Strong Linux knowledge and scripting skills in Python & Shell
  • Excellent debugging, analytical, and problem-solving skills.
  • Desired Skills:
  • Hands-on experience with UE simulators such as TM500, Keysight, or equivalent test platforms.
  • Good understanding of Core Network configuration and integration for LTE/5G testing.
  • Exposure to O-RAN architecture and multi-vendor interoperability testing with CU/DU.
  • Experience in CI/CD, build integration, test automation, and continuous validation frameworks.

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