Senior System Test Engineer, NTN & Satellite RAN

Skylo; Mountain View (CA); On-site; USD 135,000 - 145,000; Full time

Job summary

Skylo is seeking a System Test Engineer in Mountain View, CA to design and execute QA strategies for our NTN. You will validate 3GPP features across device, RAN, core networks, and satellite segments, coordinating with architects and engineers to ensure reliability and performance.

The role requires lab and field testing, automation, and strong debugging skills. Onsite work is required three days per week; experience with AI-assisted workflows is expected.

Qualifications

• Proven track record in system test or validation engineering or acceptance testing for large-scale systems.
• Strong understanding of 3GPP cellular protocols (LTE/5G/NBIOT-NTN).
• Experience with QA processes from criteria to test suites.
• Hands-on system integration and end-to-end validation.
• Experience with load/chaos testing and fault injection.
• Experience with device testing and UE emulators.
• Familiarity with RESTful APIs and gRPC for testing.
• Ability to script in Bash/Python/Go/Ruby and run automation via Jenkins.
• Strong troubleshooting and cross-functional communication.

Responsibilities

• Design and execute QA strategies for Skylo’s NTN end-to-end system.
• Define test plans and automate where possible.
• Collaborate with architects, developers, and network engineers on test strategies.
• Perform integration, interoperability, and regression testing across device, RAN, core, and satellite segments.
• Conduct lab and field testing under real-world conditions.
• Analyze and debug complex system issues across hardware, software, and network layers.
• Define KPIs, collect telemetry, and validate observability tooling.
• Document results and drive issue resolution with teams.
• Mentor junior engineers and improve validation processes.

Skills

System test

3GPP LTE/5G

QA processes

Automation scripting

Troubleshooting

Communication

AI tools usage

Education

Advanced degree in Electrical Engineering / Telecommunications / Computer Science

Tools

Postman

gRPC

Jenkins

Robot Framework

JIRA

Confluence

Job description

Skylo is seeking a System Test Engineer in Mountain View, CA to design and execute QA strategies for our NTN. You will validate 3GPP features across device, RAN, core networks, and satellite segments, coordinating with architects and engineers to ensure reliability and performance.

The role requires lab and field testing, automation, and strong debugging skills. Onsite work is required three days per week; experience with AI-assisted workflows is expected.