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

Company:

Qualcomm India Private Limited

Job Area:

Engineering Group, Engineering Group > Systems Engineering

General Summary:

We are hiring a Layer‑1 (Physical Layer) Firmware Engineer to work on 5G NR gNodeB Firmware . This role focuses on PHY development on the DU side , building high‑performance, real‑time wireless software used in modern cellular networks.

You will work closely with PHY, RF, platform, and system teams to develop and optimize carrier‑grade NR PHY features .

What You’ll Do

Develop and maintain Layer‑1 (PHY) firmware for 5G NR gNodeB

Work on uplink and downlink PHY channels , including:

PUSCH, PDSCH, PUCCH, PDCCH, PRACH, SRS, SSB

Implement and optimize signal processing algorithms such as:

Channel estimation and equalization

HARQ processing

MIMO and beamforming

Work on FEC processing :

Turbo coding/decoding (LTE)

LDPC and Polar coding/decoding (5G NR)

Optimize real‑time performance for latency and throughput

Integrate PHY software with MAC, RF, and hardware platforms

Debug complex PHY‑level and real‑time issues

What We’re Looking For

Required Skills

Strong experience in Layer‑1 / PHY firmware development

Hands‑on experience with LTE and/or 5G NR

Solid understanding of 3GPP PHY specifications

Strong C/C++ programming skills

Experience working on real‑time or embedded systems

Good understanding of:

OFDM / SC‑FDMA

Numerologies and frame structures

HARQ and link adaptation

Nice to Have

Experience with gNodeB / 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

Minimum Qualifications:

Bachelor's degree in Engineering, Information Systems, Computer Science, or related field and 2+ years of Systems Engineering or related work experience.

OR

Master's degree in Engineering, Information Systems, Computer Science, or related field and 1+ year of Systems Engineering or related work experience.

OR

PhD in Engineering, Information Systems, Computer Science, or related field.

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