Flight Software Engineer

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Xona is the navigational intelligence company bringing real‑time, centimeter‑level certainty to any device, anywhere on Earth. With Pulsar – the world’s most advanced PNT satellite infrastructure in Low Earth Orbit – Xona will offer a future‑proof, backwards‑compatible global positioning system optimized for absolute precision, superior power, and robust protection.

• Develop, integrate, and optimize embedded flight software for satellite subsystems, writing production‑quality code daily.
• Execute comprehensive full‑system test campaigns, emphasizing detailed hardware/software interface validation.
• Collaborate closely with Integration & Test (I&T), hardware engineering, and operations teams to implement robust software interfaces, manage fault conditions, and develop effective mitigation strategies.
• Continuously improve software components and integration procedures, contributing to long‑term reliability and scalability.
• Translate complex operational workflows into clear technical documentation, ensuring maintainability and knowledge transfer.
• Optimize software performance, stability, and resilience, enhancing spacecraft operational reliability.

• You love writing clean, robust, and maintainable code for embedded systems and thrive when diving deeply into complex software‑hardware integrations.
• You have a passion for building reliable software and solving intricate technical challenges.
• You have a high attention to detail, are methodical, and comfortable debugging code in real‑time embedded environments.
• You enjoy collaborating across engineering disciplines, proactively identifying risks, and solving challenging technical problems.
• You have hands‑on experience integrating GNC auto‑generated or hand‑written control algorithms into a flight software stack, ensuring seamless interfacing, timing determinism, and performance under real‑time constraints.

• Experience with on‑orbit operations, fault detection, isolation & recovery (FDIR), or embedded autonomy.
• Prior experience developing embedded systems software in aerospace or similarly rigorous industries.
• Hands‑on experience working with satellite flight hardware or spacecraft testbeds.

• Strong proficiency in writing embedded software in C/C++ on real‑time operating systems (RTOS) or space‑focused software frameworks (e.g., cFS, F', TASTE).
• Solid understanding of software testing methodologies and best practices.
• Demonstrated experience with full‑system testing and software/hardware interface validation.
• Proven experience implementing communication protocols and interfaces (e.g., CAN, RS‑422/485, Ethernet).
• Excellent analytical, debugging, and problem‑solving skills.
• Strong written and verbal communication abilities and collaborative teamwork skills.

For U.S. Roles: applicant must be a U.S. citizen, lawful permanent resident of the United States, or other protected individual as defined by 8 U.S.C. 1324b(a)(3).
For U.K. Roles: successful candidates must be eligible to obtain UK Security Clearance (SC) and pass Baseline Personnel Security Standard (BPSS) checks.
For Canada Roles: successful candidates must obtain and hold a security clearance at the reliability status level, and pass security assessment for the Canadian Controlled Goods Program (CGP) and ITAR.

We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.