4G/5G RAN Layer 2 (MAC/RLC/PDCP) C++ Engineer (Contract)

Project overview

Contract role for a 4G/5G RAN Layer-2 engineer to design, develop, optimize, and debug MAC scheduling and L2 protocol features (MAC/RLC/PDCP) for LTE eNB and 5G NR gNB. The position requires strong C/C++ (plus Python), deep understanding of 3GPP specs and L2 behavior across FDD/TDD (HARQ timing, UL grants, DRX, QoS), and hands-on log/protocol analysis using tools like Wireshark/QCAT/Viavi/Ixia/Spirent. Work location is Bengaluru (Manyata) or Delhi NCR; BE/BTech required; Google Test is preferred.

Responsibilities

• Systems Engineering, design, architecture, coding, debugging and implementation, feature scalability from a broader system-level perspective for 4G/5G L2
• FDD and TDD
• Review and Mentor high performance L1 teams towards delivery excellence in the following PDCP/RLC/MAC layer development on various platforms and integrations with L1 and L3, OAM etc for high performance basestations
• Ability to drive large scale 4G/5G L2 product development, sustenance and customer support programs involving multiple variants of eNodeBs/gNodeBs in various forms including vRAN/ORAN/custom
• Ability to communicate with senior levels of internal and external stakeholders

Requirements

• 4G/5G RAN Layer 2
• LTE/NR MAC layer
• MAC scheduling algorithms (eNB/gNB)
• RLC (segmentation/reassembly, retransmission, flow control)
• PDCP (ciphering/integrity interaction points, packet duplication/splitting)
• 3GPP specifications (LTE/NR)
• FDD vs TDD timing implications (HARQ/scheduler timing)
• DRX interactions and buffer status behavior
• QoS concepts (QoS flow to radio bearer mapping, logical channel prioritization)
• C/C++ programming
• Debugging/state machines/error handling/traceability
• Log analysis and protocol decode workflows (e.g., ASN.1/protocol decode)

Project details

• Start: flexible
• Remote: onsite
• Location: India, IN