Senior System Test Engineer, Skylo

• 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

Desirable

• 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
• 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