Senior 5G Software Test Engineer, Physical Layer

About the role

Position Overview

Are you prepared to deliver secure, intelligent connectivity from orbit to every corner of the globe? If so, this opportunity aligns with your ambition. E-Space operates at the intersection of Earth and orbit, enabling massive IoT deployments that were previously impossible. We are engineering a next-generation Low Earth Orbit constellation to revolutionize how IoT solutions are designed, built, and serviced.

Our mission is bold. We are 100% dedicated to advancing space-based communications, generating actionable data for global economies, safeguarding our planet and assets in space, and improving daily life. We seek a meticulous engineer who shares our inquisitive mindset and commitment to excellence.

Role Definition

The incumbent will set the standard for 5G physical layer validation in a high-growth environment. You will own the verification strategy, ensuring software correctness and performance for real-time implementations. The focus spans both central processing units and hardware accelerators, demanding rigorous attention to detail. You will act as the primary liaison between software logic and radio performance.

Collaboration is central to this position. You will work directly with software developers, RF specialists, digital signal processing experts, and hardware engineers. Your analysis will resolve intricate integration challenges, aligning test methods with protocol specifications. This role is based in the United States, with options in Arlington, TX, or Saratoga, CA.

Key Responsibilities

You will architect testing workflows that define channel conditions, model propagation environments, and map requirements to specific releases.

You will develop verification frameworks that synchronize software models with hardware execution paths, ensuring consistent validation results.

You will analyze waveform captures, system logs, and performance telemetry to pinpoint timing anomalies and processing bottlenecks.

You will deliver test packages and regression suites that validate release candidates against strict quality and schedule constraints.

You will partner with RF and link budget experts to validate theoretical models against practical implementation.

You will guide engineering teams through difficult technical issues, documenting procedures and confirming resolutions adhere to standards.

You will maintain living documentation that reflects new environmental scenarios, protocol states, and boundary conditions.

You will refine automation scripts, optimize test execution speed, and manage the infrastructure that enables continuous validation cycles.

Professional Profile

You bring three to five years of specialized experience testing cellular or satellite communication systems. Your background includes protocol-level or physical-layer verification. You comprehend the intricacies of 3GPP specifications governing radio transmission and baseband processing. Proficiency with Python is essential for building analysis tools and driving automation.

You can navigate C or C++ codebases, interpreting system logs and correlating findings with processor-level execution. You configure test benches for both x86 and Arm architectures, with exposure to accelerator integration. You are experienced in using signal generation, channel simulation, and measurement instruments to validate timing, capacity, and integrity metrics.

Additional Qualifications

Hands-on experience with 5G New Radio test equipment, over-the-air testbeds, or channel simulators is advantageous.

Core Competencies

Python, C, C++, 5G NR, Physical Layer, 3GPP Specifications, Continuous Integration, Git, Test Instruments, Jira.

Requirements

Education and Experience

• Bachelor's degree in Electrical Engineering, Computer Engineering, Computer Science, or a related technical field. A Master's degree is preferred.
• A minimum of 3-5 years of professional experience in test engineering, with a focus on cellular or satellite communications.
• Demonstrated history of protocol-level and physical-layer verification for wireless systems.
• Hands-on experience with 5G New Radio (NR) testbeds, channel simulators, or over-the-air test systems.
• Strong proficiency in Python for test automation, data analysis, and toolchain development.
• Solid ability to read, navigate, and debug C or C++ code in real-time system environments.
• Experience configuring and validating test benches on x86 and Arm platforms, including accelerator integration.
• Familiarity with 3GPP specifications relevant to radio transmission and baseband processing.
• Knowledge of RF concepts, link budget analysis, and signal integrity metrics.
• Exposure to Continuous Integration pipelines and version control via Git.
• Experience with test and measurement instruments such as spectrum analyzers, signal generators, and protocol analyzers.
• Track record of creating and maintaining regression test suites and detailed documentation.

Skills and Tools

• Programming: Python, C, C++.
• Wireless Protocols: 5G NR, Physical Layer.
• Standards: 3GPP Specifications.
• Processes: Continuous Integration, Git.
• Tools: Test Instruments, Jira.

Next Steps

All specifics regarding compensation, benefits, and location are confirmed on the official application page. Review those details before proceeding.