Job Summary

We are hiring an experienced staff level - Layer1 (Physical Layer) Firmware Engineer to work on 5G NR gNodeB Firmware. This role focuses on PHY development on the DUside, 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.

Responsibilities

- Develop and maintain Layer1 (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 realtime performance for latency and throughput
- Integrate PHY software with MAC, RF, and hardware platforms
- Debug complex PHY level and realtime issues

What We're Looking For Required Skills

- 5-8 years of solid experience in Layer1 / 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 realtime or embedded systems
- Good understanding of:
- OFDM / scfdma
- Numerologies and frame structures
- HARQ and link adaptation

Nice to Have

- Experience with gNodeB / eNodeB PHY software
- Exposure to FAPI / nfapi or similar PHYMAC interfaces
- Experience with massive MIMO or beamforming
- Knowledge of ORAN or splitPHY architectures
- Background in DSP or wireless signal processing
- Experience with NBIoT, NTN, or advanced NR PHY features

Tools & Technologies

- Programming: C, C++
- Platforms: Embedded Linux, RTOS, DSP-based systems
- Standards: 3GPP LTE 5G NR
- Domains: PHY, realtime systems, wireless signal processing

Minimum Qualifications Bachelor's degree in Engineering, Information Systems, Computer Science, or related field and 4+ years of Systems Engineering or related work experience.

OR

Master's degree in Engineering, Information Systems, Computer Science, or related field and 3+ years of Systems Engineering or related work experience.

OR

PhD in Engineering, Information Systems, Computer Science, or related field and 2+ years of Systems Engineering or related work experience.

📌 Senior Engineer/Lead - Layer 1 (PHY) Firmware Engineer - 5G NR gNodeB (Hyderabad)
🏢 Qualcomm
📍 Hyderabad