Senior Flight Software Engineer II - Automation & Test

Please Note: To conform with the United States Government Space Technology Export Regulations, the applicant must be a U.S. citizen, lawful permanent resident of the U.S., conditional resident, asylee or refugee (protected individuals as defined by 8 U.S.C. 1324b(a)(3)), or eligible to obtain the required authorizations from the U.S. Department of State.

At Cesium Astro
, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, Cesium Astro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team.

• Design and implement an automated testing ecosystem to verify Cesium Astro satellite flight software and satellite systems.
• Develop, execute, and maintain test scripts to validate software functionality on flatsat, Hardware-in-the-loop (HIL) systems and simulated systems.
• Create complex testing automation plans using industry standard languages and frameworks.
• Create test plans aligned to validate system requirements and mission objectives.
• Integrate automated tests into CI/CD pipelines to support rapid iteration during release cycles.
• Analyze test results to provide clear, actionable feedback to engineering teams.
• Work with engineers across all teams at Cesium Astro to debug, investigate, and document hardware and software defects.
• Improve test coverage, execution efficiency, and reliability over time.
• Identify areas of improvement on our test automation posture across the organization.

• Bachelor of Science (BS), Master of Science (MS), or Doctorate (PhD) degree in Software or Computer Engineering from an accredited university or institution.
• Minimum of 6 years of industry experience in spacecraft software development.
• Experience writing automated testing scripts with Python, C, or C++.
• Experience with OpenC3 COSMOS software for operations and test automation
• Strong debugging, troubleshooting, and root-cause analysis skills.
• Strong communication and organization skills.

• Experience testing software on hardware test platforms (HIL, flatsat, integration benches, or similar).
• Experience with Linux, Single Board Computers, embedded computers, and FPGAs.
• Experience using git, Continuous Integration, and monitoring tools to fully automate validation and testing during development.
• Experience with containerization tools like Docker.
• Deployment of testing software used in real-world applications.
• Fundamental knowledge of communication protocols (UART, SPI, I2C, Ethernet, CAN, etc.)
• Familiarity with requirements traceability tools.
• Understanding of mission-critical or safety-critical software validation.
• Basic experience with RF and electrical engineering lab equipment for testing and debugging.