Senior 5G Software Test Engineer, Physical Layer

Espace; Saratoga (CA); On-site; USD 150,000 - 200,000; Full time

Benefits offered by this job

Health and wellness care options

Paid holidays

Continuous learning and development

Job summary

Espace is looking for a Senior 5G Software Test Engineer to work in Saratoga, CA. This full-time role involves designing and executing test plans for 5G technologies, validating PHY layer functions, and collaborating with global teams. Ideal candidates should have a Master's in Electrical or Communications Engineering and strong experience in 5G testing.

Compensation ranges from $150,000 to $200,000 annually, with additional benefits focused on health and wellness, and opportunities for continuous development.

Qualifications

• Master's degree in Electrical or Communications Engineering.
• Strong experience in 5G NR PHY testing and validation.
• Solid understanding of digital communications concepts.

Responsibilities

• Design and execute PHY-level test plans for 5G NR software.
• Validate key PHY functions and compliance with specifications.
• Collaborate closely with development and testing teams.

Skills

5G NR PHY testing

Digital Communications

Test Automation

Debugging Skills

MATLAB

Python

SDR platforms

Real-time Embedded Systems

3GPP Specifications

Non-Terrestrial Networks

Education

Master of Science in Electrical Engineering

Master of Engineering in Communications Engineering

Tools

DSPs

RF Test Equipment

Job description

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