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.
We’re seeking a Staff Flight Software Engineer. You’ll serve as a primary contributor to the flight software design, working to shape system interfaces and component interactions.

DESIRED QUALIFICATIONS

• Hands-on experience with on-orbit operations, telemetry analysis, or spacecraft HIL testbeds.
• Background in aerospace or other safety-critical industries.
• Advanced degree in Computer Science, Electrical Engineering, or related field.

REQUIREMENTS

• Experience: 8+ years developing C/C++ embedded software on RTOS or space-grade frameworks (cFS, F’, TASTE, etc.).
• Integration & Testing: Proven track record executing full-system hardware/software validation and fault-injection test campaigns.
• Protocols & Interfaces: Deep expertise with RS-422/485, Ethernet, I2C, or similar communication buses in embedded environments.
• Real-Time Systems: Solid understanding of real-time scheduling, FDIR principles, and performance profiling under resource constraints.
• Communication: Excellent written and verbal skills for cross-team collaboration and technical documentation.
• CCSDS Expertise: Hands-on experience implementing CCSDS Telemetry (TM) and Telecommand (TC) packet standards, including header/payload formats, Virtual Channel multiplexing, and CRC/error-control procedures.
  To comply with U.S. Government space technology export regulations, applicant must be a U.S. citizen, lawful permanent resident of the United States (i.e. Green Card holder), or other protected individual as defined by 8 U.S.C. 1324b(a)(3).
  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.
  Compensation Range: $190K - $230

• Develop & Integrate: Implement embedded flight software modules in C++ on RTOS or space-grade frameworks; carry features from concept through flight-ready validation.
• System Validation: Plan and execute comprehensive hardware/software integration tests, including fault-injection scenarios and performance benchmarking.
• Cross-Functional Collaboration: Partner with hardware engineering, GNC, and operations to define interfaces, manage fault conditions, and implement mitigation workflows.
• CCSDS TT&C Integration: Develop and validate CCSDS-compliant Telemetry, Tracking & Command (TT&C) subsystems—implement frame assembly/disassembly, packetization, CRC/error-control coding, and end-to-end link workflows.
• Optimization & Reliability: Profile and tune software for CPU, memory, and I/O efficiency; contribute to FDIR logic and scheduler enhancements to maximize on-orbit reliability.
• Mentorship & Best Practices: Coach mid-level engineers through design reviews and code walks; promote coding standards, automated testing, and CI/CD pipelines.
• Documentation & Tooling: Produce clear technical artifacts - ICDs, test plans, runbooks - and help build digital tools for telemetry analysis and on-orbit diagnostics.