Senior 5G Software Test Engineer, Physical Layer

E-Space•Arlington, TX

6d•$150,000 - $200,000

About The Position

Ready to make connectivity from space universally accessible, secure and actionable? Then you’ve come to the right place! E-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. We are building a highly-advanced low Earth orbit (LEO) space system that will fundamentally change the design, economics, manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems. We’re intentional, we’re unapologetically curious and we’re 100% committed to innovate space-based communications and deliver actionable intelligence that will expand global economies, protect space and our planet and enhance our overall quality of life. As a Senior 5G Software Test Engineer focused on the Physical Layer , you will lead the verification, validation, and performance testing of 5G NR PHY software for 3GPP Release 15/16/17 and beyond-5G systems. Your primary focus will be ensuring correctness, performance, and robustness of real-time PHY implementations running on processor- and accelerator-based platforms. You will work closely with PHY software developers, RF engineers, DSP teams, and hardware teams to validate PHY features, diagnose complex issues, and ensure high-quality, production-ready software. This position is based in the USA (Arlington, TX or Saratoga, CA) .

Requirements

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

Nice To Haves

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

Responsibilities

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