You will be taken to Tejas Networks Ltd.’s own careers page to apply. Job ID 371.
Job description
Tejas wireless team has developed high-capacity LTE macro eNodeB, 5G NR gNodeB along with Radio Units as part of end-to-end integrated solution to their customers. Our systems are already deployed in customer’s commercial network and engineers are working on to enhance the capacity and improve system level performance.
Tejas Networks has invested in Wireless product development since 2012 with a vision to create globally deployable telecom RAN solutions. Several of the key components developed by the Wireless R&D team have been installed and commissioned across three continents. We are an active partner for 5G in the Indian Ecosystem and have significantly contributed to India’s standardization efforts in 3GPP, through TSDSI. The wireless team has over 100 patents. As part of the wireless team, you will work on developing products for next generation wireless systems.
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.
Requirements
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
