Senior System Test Engineer

Zoomcar; Mountain View (CA); On-site; USD 125,000 - 135,000; Full time

Job summary

A technology company based in Mountain View, CA is looking for a System Test Engineer to enhance their satellite network’s reliability and performance. The ideal candidate will design test plans, perform integrations, and ensure compliance with 3GPP standards for advanced systems. The position requires strong experience in system validation and troubleshooting, with a salary range of $125,000 - $135,000 plus equity. The role emphasizes collaboration and innovation in a dynamic environment.

Qualifications

• Proven experience in system test or validation engineering.
• Strong understanding of 3GPP cellular protocols.
• Hands-on experience with load testing and chaos testing.

Responsibilities

• Develop comprehensive test plans for NTN system functionality.
• Collaborate with engineers to define testing strategies.
• Analyze and debug complex system issues.

Skills

System test engineering

3GPP cellular protocols

QA processes

Troubleshooting and problem-solving

Communication skills

Education

Advanced degree in Electrical Engineering, Telecommunications, or related discipline

Tools

JIRA

Confluence

Postman

Robot Framework

Job description

About Skylo

Skylo Technologies is building the world’s most affordable and accessible satellite network, enabling real-time IoT connectivity for industries such as agriculture, logistics, maritime, and emergency services. Our network leverages existing geostationary satellites, cloud-based infrastructure, and cutting‑edge software‑defined networking to connect devices anywhere on the planet.

This role is located Mountain View, CA where we are onsite 3 days a week in office.

Summary Of How You Will Impact Skylo

We are seeking a highly skilled System Test Engineer to design and execute quality assurance strategies for Skylo’s end‑to‑end satellite Non‑Terrestrial Network (NTN). This role will focus on ensuring system reliability, performance, and compliance with 3GPP standards across device, radio access, and core network layers. The engineer will be responsible for test planning, execution, and analysis to validate network features, field deployments, and customer‑facing services.

Responsibilities

• Develop and execute comprehensive test plans to validate Skylo’s NTN system functionality, scalability, and performance—from understanding requirements, to defining test plans to execution to automation.
• Collaborate with system architects, software developers, and network engineers to define test strategies for new features and releases.
• Conduct integration, interoperability, and regression testing across device, RAN, core network, and satellite segments.
• Perform lab‑based and field‑based testing to validate performance under real‑world conditions.
• Analyze and debug complex system issues, identifying root causes across hardware, software, and network layers.
• Define KPIs, collect telemetry, and assess observability tools for ongoing system validation.
• Document test results, provide clear feedback to development teams, and drive resolution of issues.
• Actively participate in test automation, enhancing test coverage for different test categories.
• Mentor junior engineers and contribute to best practices in system validation methodologies and processes.

Required Experience

• Proven track record in system test or validation engineering or acceptance testing for large‑scale, distributed, or telecommunications systems.
• Strong understanding of 3GPP cellular protocols (LTE/5G/NBIOT-NTN), with a strong emphasis on RAN and Core Network components.
• Strong understanding of QA processes—from defining acceptance criteria to requirements to test suites.
• Hands‑on experience with system integration, performance benchmarking, and end‑to‑end validation.
• Hands‑on experience with load testing, chaos testing, fault injection, efficiency testing.
• Hands‑on experience with protocol validation, device testing (using AT commands and otherwise), UE emulators.
• Familiarity with RESTful APIs for testing using tools such as Postman, along with gRPC APIs.
• Ability to script and/or program in either Bash, Python, Go, Ruby on a Unix/Linux or equivalent program and to execute automation jobs using Jenkins.
• Strong troubleshooting, root‑cause analysis, and problem‑solving skills.
• Ability to thrive in a fast‑paced, execution‑driven environment with minimal oversight.
• Excellent communication skills for cross‑functional collaboration.

Nice to have

• Experience with satellite or NTN systems, including LEO/MEO/GEO connectivity.
• Familiarity with RF testing methodologies, lab equipment, and field measurement tools.
• Exposure to cloud‑based infrastructure and virtualized test environments.
• Advanced degree in Electrical Engineering, Telecommunications, Computer Science, or related discipline.
• Hands‑on experience using JIRA & Confluence.
• Experience with designing and building test automation frameworks using Robot Framework and Python.
• Experience leading system validation projects or mentoring junior engineers.

Additional information

The compensation range for this position is: $125,000 - $135,000 plus equity. This range reflects the low and high end of the range Skylo reasonably and generally expects to pay the hired candidate in this role.

EEO Statement

Skylo is an equal‑opportunity employer and we celebrate diversity. We do not discriminate on the basis of race, religion, color, ancestry, national origin, caste, sex, sexual orientation, parent or caregiver status, political affiliation, gender, gender identity or expression, age, disability, medical condition, pregnancy, genetic makeup, marital status, or military service consistent with applicable federal, state, and local laws.

We are also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. Please let us know if you need assistance or accommodation due to a disability.