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Layer-3 Developer - 5G / Telecom Protocols
Softpath Technologies LLCBangalore2 days ago
Job descriptionWork on CU-CP, CU-UP, and DU components within gNB architecture. Integrate and optimize L3 modules in CU / DU split environment. Ensure alignment with 3GPP Release standards and interoperability requirements. Work with O-RAN F1 (F1-C / F1-U) and E1 interfaces. Participate in integration and validation of O-RAN compliant CU / DU components. Support interoperability testing with multi-vendor O-RAN implementations. Develop high-performance, scalable, and efficient code in C / C++ on Linux environment. Work on multi-threaded programming, inter-process communication, and low-latency processing. Participate in code reviews, performance optimization, and debugging. Interpret and implement features based on 3GPP specifications (38.xxx series). Contribute to design documents, architecture diagrams, configuration guides, and release notes. Ensure code quality, documentation, and best engineering practices are followed. Debug issues at Layer-3 and interface with Layer-2 / Layer-1 teams. Work closely with system integration teams to validate features in lab and field environments. Support protocol testing, logging analysis, KPI monitoring, and trace analysis (RRC, PDCP logs). 3 to 5 years of experience in 5G NR / 4G / 3G wireless protocol stack development. Strong understanding of 5G NR architecture, especially CU / DU split. Hands-on experience with L3 protocols : Strong programming skills in C / C++, Linux environment, multi-threaded programming. Proficiency in O-RAN interfaces : F1-C / F1-U, E1. Knowledge of QoS, SON, mobility management, and data / session handling. Strong understanding of 3GPP 5G NR specifications (Release 15 / 16 / 17). Experience with debugging tools, log analysis, and protocol analyzers. Experience with 4G LTE L3 protocols (RRC / PDCP) is an added advantage. Exposure to Wireshark, QXDM, UERANSIM, or similar protocol testing tools. Experience working in Agile development environments. Exposure to O-RAN specifications and open-source RAN projects.
Description : Layer-3 Developer (5G NR)
Experience : 35 Years
Location : Bangalore
Domain : Telecom / 5G / Wireless / L3 Protocol Stack
Mode : Work From Office
Key Responsibilities :
5G NR Layer-3 Protocol Development :
- Design, develop, implement, and optimize Layer-3 (L3) modules including RRC, PDCP, and SDAP.
- Work on control plane procedures (RRC connection setup, reconfiguration, release, measurement, etc.).
- Implement mobility management (handover, cell reselection), security, QoS, and session management functions.
5G CU / DU Architecture :
O-RAN Interface Development :
Software Development & Optimization :
Standards, Compliance & Documentation :
Debugging, Testing & Integration :
Required Skills & Experience :
a. RRC (Radio Resource Control)
b. PDCP (Packet Data Convergence Protocol)
c. SDAP (Service Data Adaptation Protocol)
Preferred Qualifications :
(ref : hirist.tech)
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Developer • Bangalore
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