Senior 5G Software Test Engineer, Physical Layer

What you will do:

5G PHY Software Testing and Validation

Design, develop, and execute PHY-level test plans for 5G NR software implementations

Validate key PHY functions such as modulation/demodulation, channel estimation, synchronization, equalization, coding/decoding, and HARQ

Verify compliance of PHY implementations with 3GPP Rel 15/16/17 specifications

Test Case Development and Automation

Create PHY-level test cases, regression tests, and validation scenarios

Generate, analyze, and verify PHY test vectors, waveforms, and logs

Develop scripts and tools (e.g., Python, MATLAB, bash) to support test automation and analysis

Lab Verification and Debug

Verify PHY functionality using 5G test equipment (e.g., R&S, Keysight/Agilent) and commercial UEs

Perform over-the-air (OTA) and conducted testing in lab environments

Debug complex PHY, timing, RF, and performance issues across software and hardware boundaries

Work closely with developers to reproduce issues and validate fixes

Platform, RF, and System Interaction

Validate integration of PHY software with RF front-end hardware and digital baseband chains

Work with SDR platforms and SoC architectures, including ARM, DSPs, and hardware accelerators

Understand and test within real-time and low-latency constraints

Collaboration and Ways of Working

Collaborate closely with PHY development, RF, systems, hardware, and protocol stack teams

Work effectively in a global, distributed team across the U.S., Europe, and India

Follow SCRUM / Agile and Continuous Integration development practices

Document test plans, results, and issues in Confluence, JIRA, or equivalent systems

What you bring to this role:

Master of Science or Master of Engineering degree in Electrical Engineering, Communications Engineering, or equivalent

Strong experience in 5G NR PHY testing, validation, or development

Solid understanding of digital communications and PHY-layer concepts

Experience working with SDR platforms and SoC-based systems

Working knowledge of MATLAB and Python for test development and analysis

Strong understanding of real-time embedded system behavior

Excellent problem-solving, communication, and debugging skills

Bonus Points:

Deep understanding of 3GPP 5G NR PHY specifications (Rel 15/16/17+)

Experience testing Non-Terrestrial Networks (NTN) or satellite communication systems

Hands-on experience with DSPs and hardware accelerators

Strong understanding of link budgets, channel models, RF impairments, and lab measurements

Experience with waveform generation, PHY simulation, and system bring-up