Job Description:
Job Title: Senior Layer 2 Developer – 4G LTE eNodeB
Experience: 8+ Years
Location: Bengaluru
Job Summary:
We are seeking a highly skilled Layer 2 Developer with deep expertise in LTE eNodeB protocol stack development. The role focuses on designing, coding, and optimizing Layer 2 components (MAC, RLC, PDCP) with strong emphasis on real-time performance, scalability, and standards compliance.
Key Technical Skills:
- Design, develop and maintain LTE Layer 2(PDCP/RLC/MAC) stack.
- Design and optimize Uplink/Downlink scheduling algorithms (QoS aware, fairness, etc.)
- Optimization of Resource allocation block.
- Design, develop and optimization of HARQ process, Power control, SPS, TTI Bundling, Link Adaptation, CA, ENDC.
- Implement L2–L1 interface handling via FAPI / nFAPI: encode/decode primitives, timing synchronization, error handling.
- Implement L2–L3 (RRC) interface: configuration primitives, bearer setup/release, re-establishment procedures.
- Read and translate 3GPP LTE Release 8–17 specifications directly into code, handling edge cases and error conditions.
- Write and maintain unit tests with high code coverage for each developed module.
- Debug L2 protocol issues independently — analyze PCAP captures, L2 traces, and scheduler logs to isolate root causes
- Should be able to prepare LLD, HLD and Interface specifications
- Expert in C/C++
- Strong experience in Linux-based development with IPC and multi-threading
Debugging Tools
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gdb, valgrind
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Wireshark / protocol analyzers
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QXDM
Soft Skills:
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Strong debugging and analytical thinking
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Ownership of features end-to-end
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Ability to mentor junior developers
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Good communication skills
Education:
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B.Tech / M.Tech in Electronics, Telecommunications, Computer Science, or equivalent
