4G LTE/NB IoT Layer-2/3 Developer

Skills

• Number of Years of Experience  5-15
• Strong understanding of LTE/NB-IoT and  5G NR layer 2 or layer-3 architecture and protocol stack.
• Good knowledge of 3GPP standards (Rel-15/16/17/18).
• Hands-on experience in LTE Layer 2 (MAC/RLC/PDCP) development  (or)LTE Layer 3 (RRC/S1AP/OAM) development 
• Proficiency in C/C++ programming. Knowledge of multi-threading and concurrency.
• Strong debugging and problem-solving skills.
• Experience with tools like Wireshark, protocol analysers, log analysis tools.  
• Familiarity with hardware-based test tools such as TM500 or UE simulators and protocol analysers like QXDM, QCAT is a plus. 
• Proficiency in GIT, Jenkins (CI/CD), and JIRA for agile development.

Key Responsibilities:

• Design, develop, and maintain Layer 2 protocols (MAC, RLC, PDCP)  or Layer 3 protocols (RRC/S1AP/NGC) features Coverage for LTE/NB-IoT.
• Contribute to documentation, including design specs and test plans.
• Analyse and debug Layer2 /Layer 3 issues using logs, traces, and protocol analysers.
• Collaborate with Core Network team for end-to-end feature integration.
• Ensure compliance with 3GPP specifications for 4G
• Participate in system design, code reviews, and performance optimization.
• Work on throughput, latency, and reliability improvements in 4G
• Support field testing, interoperability testing, and customer issue resolution.