E-Space · 20 hours ago
Senior 5G Software Test Engineer, Physical Layer
Saratoga, CA
Full-time
Onsite
Senior Level
$150K/yr - $200K/yrE-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. 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, ensuring correctness and robustness of real-time implementations.
Information ServicesSatellite Communication
No H1B
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
Qualification
Required
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
Preferred
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
Benefits
Health and wellness care options
Financial solutions for the future
Optional legal services (US only)
Paid holidays
Paid time off
Company
E-Space
E-Space is bridging Earth & space with the most sustainable LEO space system, delivering real-time, anywhere comms, IoT & Smart-IoT services
Founded in 2021
201-500 employees
Funding
Current Stage
Growth StageTotal Funding
$50MKey Investors
Prime Movers Lab
2024-10-01Series Unknown
2022-02-07Seed· $50M
Leadership Team
Cindy (Huimin) Du
Chief Financial Officer
Recent News
2025-08-29
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