Senior 5G Software Test Engineer, Physical Layer

Senior 5G Software Test Engineer – Physical Layer Ready to make connectivity from space universally accessible, secure and actionable? 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 space system that will fundamentally change the design, economics, manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems. This position is based in the United States (Arlington, TX or Saratoga, CA). The role may require occasional nights and weekends to meet critical deadlines. Responsibilities 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 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 Verify PHY functionality using 5G test equipment such as R&S and Keysight/Agilent and commercial UEs Perform over‑the‑air and conducted testing in lab environments Debug complex PHY, timing, RF, and performance issues across software and hardware boundaries 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 using SCRUM/Agile and continuous integration practices Document test plans, results, and issues in Confluence, JIRA, or equivalent systems Qualifications Master of Science or Master of Engineering 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 Deep understanding of 3GPP 5G NR PHY specifications (Rel 15/16/17+) Experience testing Non‑Terrestrial Networks 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 Compensation & Benefits Full‑time, exempt position based out of our Saratoga office Target base pay $150,000 – $200,000 annually with total compensation based on relevant experience Opportunity to really make a difference Sustainability at our core Fair and honest workplace Innovative thinking encouraged Competitive salaries Continuous learning and development Health and wellness care options Financial solutions for the future Optional legal services (US only) Paid holidays Paid time off #J-18808-Ljbffr Espace