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
- Solid 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.