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 Country.

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. For both the gNB and UE, it supports all FR1 bandwidths with 256-QAM as well as SISO and 2-layer MIMO in downlink and uplink, and 100 and 200 MHz bandwidths in FR2. It supports all control and transport channels necessary for operation in 5G standalone (SA), and SRS and CSI-RS for MIMO operation. The full list of supported features can be found here.
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 in OAI, and test of the 7.2 interface
Refactoring of the existing L1 code base towards a more efficient implementation, writing of tests

We are looking for a telecom dev software engineer with very good knowledge of C/C++. The applicant should have very good knowledge of 3GPP 38.2xx and 38.331 specifications in Release 15+. This means that the applicant should have a background in implementing 3GPP in code (L1 required, L2/L3 as a bonus). Prior experience with 5G/NR L1 in other implementations and the MATLAB toolbox is a strong plus. Working on the UE L1/PHY stack can be a possible follow-up.

Gitlab link: https://gitlab.eurecom.fr/oai/openairinterface5g/

Required/Mandatory Skills:

Very strong C/C++ skills
Very good knowledge of 3GPP 38.2xx and 38.331 specifications in Rel.15+
Solid experience in RAN software development (L1 experience required, L2/L3 is a bonus) and using SIMD intrinsics
Very good understanding of Git SCM
Experience with 5G/NR L1 implementations or MATLAB is a plus

Qualification:

Work experience of a minimum of 3 years
Master’s degree in Computer Science, Telecommunications, or equivalent
Strong analytical skills and problem-solving attitude
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 careers@openairinterface.org