Layer-3 Developer

5 days ago

Bengaluru, India Softpath Technologies LLC Full time

Description : Layer-3 Developer (5G NR)Experience : 35 YearsLocation : BangaloreDomain : Telecom / 5G / Wireless / L3 Protocol StackMode : Work From OfficeKey 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 : - Work 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.O-RAN Interface Development : - 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.Software Development & Optimization : - 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.Standards, Compliance & Documentation : - 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.Debugging, Testing & Integration : - 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).Required Skills & Experience : - 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 : a. RRC (Radio Resource Control)b. PDCP (Packet Data Convergence Protocol)c. SDAP (Service Data Adaptation Protocol)- 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.Preferred Qualifications : - 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. (ref:hirist.tech)

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