5G RAN L1/PHY Engineer Position
• *Position:** 5G RAN L1/PHY Engineer
- *Type of Contract:**
Full-time, Permanent
- *Start Date:**
Immediate
- *Location:**
United States
- *Eligibility:**
Candidates must be based in the United States and authorized to work in the United States.
- *Job Description:**
The OAI L1 5G stack is a fully open-source implementation of the 5G/NR physical layer (3GPP 38.2xx, Rel. 15), written in C and running on generic Intel/AMD-based and ARM-based CPUs. It supports both gNB and UE implementations, covering:
- All FR1 bandwidths with 256-QAM
- SISO and up to 4-layer MIMO in both downlink and uplink
- 100 MHz and 200 MHz bandwidths in FR2
The stack includes all control and transport channels required for 5G standalone (SA) operation, along with SRS and CSI-RS support for advanced MIMO functionalities, including Massive MIMO. The full list of supported features can be found here: https://gitlab.eurecom.fr/oai/openairinterface5g/-/blob/develop/doc/FEATURE_SET.md#gnb-phy You will contribute to the improvement of the 5G L1/PHY stack of OAI. Specifically, you will start working on the L1/PHY of the gNB:
- Support with the implementation of digital beamforming in the downlink
- Support with the integration of the OSC xRAN library into OAI and testing of the 7.2 interface
- Support of implementation activities towards Cat-B O-RU handling in the OAI DU
We are seeking a telecom software development engineer with strong expertise in C/C++. The applicant should have a deep understanding of 3GPP 5G/NR L1 operations as well as O-RAN Open Fronthaul Interface specifications. This includes hands-on experience implementing 3GPP specifications in code (L1 required, L2/L3 as a plus). Prior experience with 5G/NR L1 implementations or the MATLAB toolbox is a strong advantage. Contributions to the UE L1/PHY stack may be considered as a follow-up. GitLab link: https://gitlab.eurecom.fr/oai/openairinterface5g/
- *Required / Mandatory Skills
- Very strong C/C++ skills
- Very good knowledge of 3GPP 5G/NR L1 operation and O-RAN Open Fronthaul Interface specifications
- Solid experience in RAN software development (L1 required, L2/L3 is a plus) and use of SIMD intrinsics
- Very good understanding of Git SCM
- Experience with 5G/NR L1 implementations or MATLAB is a plus
- *Qualifications
- Work experience of a minimum of 3 years
- Master’s degree in Computer Science, Telecommunications, or equivalent
- Strong analytical and problem-solving skills
- Good interpersonal and teamwork skills to collaborate and work well with others
- *Salary**
Commensurate with experience and skill set
- *Why Join Us?
- Contribute to one of the most impactful open-source communities in cellular networks
- Work with cutting-edge technologies in 5G and 6G
- Gain international exposure through collaboration with industry leaders and open networking communities
- Be part of an organization that values autonomy, fosters mastery, and is driven by a strong sense of purpose
- *Ready to apply?
Send your application to
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