Senior Engineer/Lead - Layer 1 (PHY) Firmware Engineer – 5G NR gNodeB

Overview

Develop and optimize Layer 1 (PHY) firmware for 5G NR gNodeB systems on the DU side, supporting high-performance, real-time wireless software.

What you'll do

• Develop and maintain PHY firmware for 5G NR gNodeB.
• Implement uplink and downlink channels including PUSCH, PDSCH, PUCCH, PDCCH, PRACH, SRS, and SSB.
• Implement channel estimation, equalization, HARQ, MIMO, and beamforming algorithms.
• Develop FEC processing using LDPC, Polar, and LTE Turbo coding.
• Optimize firmware for real-time latency and throughput.
• Integrate PHY software with MAC, RF, and hardware platforms.
• Debug PHY-level and real-time issues.

What you'll need

• 5–8 years of Layer 1 or PHY firmware development experience.
• Hands-on LTE and/or 5G NR experience.
• Strong C/C++ programming skills.
• Experience with real-time or embedded systems.
• Understanding of 3GPP PHY specifications.
• Knowledge of OFDM, SC-FDMA, numerologies, frame structures, HARQ, and link adaptation.
• Bachelor's degree with 4+ years, master's degree with 3+ years, or PhD with 2+ years of related experience.

Nice to have

• Experience with gNodeB or eNodeB PHY software.
• Exposure to FAPI, nFAPI, or similar PHY-MAC interfaces.
• Experience with massive MIMO or beamforming.
• Knowledge of O-RAN or split-PHY architectures.
• Background in DSP or wireless signal processing.
• Experience with NB-IoT, NTN, or advanced NR PHY features.

Details

• Location: Hyderabad, Telangana, India.