Flight Software Engineer

The role

You will write deterministic, real-time C++ code for cargo aircraft flight computers. This includes reading sensors, commanding actuators, and running control laws to ensure aircraft safety.

What you will do

• Develop real-time embedded flight software in C++
• Write drivers and interfaces for sensors, actuators, engine controllers, and data buses
• Implement fault detection and response
• Implement GNC team algorithms in flight code and verify against simulation
• Define software requirements and interfaces and trace them to tests
• Write unit tests and extend software-in-the-loop and hardware-in-the-loop coverage
• Build telemetry, logging, and command paths between aircraft and ground station
• Support aircraft integration, ground testing, and flight test
• Debug flight software in the lab and from flight data
• Participate in code and design reviews

Required qualifications

• B.S. in computer science, engineering, or a related field, or equivalent experience
• 2+ years of professional C or C++ development
• Professional experience developing software for an embedded, real-time, or safety-critical system (aircraft, spacecraft, automotive, robotics, or medical)
• Experience debugging software on real hardware

Nice to have

• Flight software experience on crewed or uncrewed aircraft, or on spacecraft
• RTOS or bare-metal development, with a working understanding of scheduling, timing, and memory
• Modern C++ in production under embedded constraints
• Familiarity with DO-178C or a comparable standard such as ISO 26262
• Python for tooling, test automation, and flight data analysis
• Clear technical writing

Benefits

• Competitive salary
• Meaningful early-stage equity
• Relocation support if applicable
• Employee Health Benefit Plans
• 6% Retirement matching
• Flexible PTO
• Free lunches, snacks, and a stocked fridge at our offices
• AI tools and subscriptions

About the company

Poseidon Aerospace builds and operates full-size autonomous cargo aircraft. The company is headquartered in the San Francisco Bay Area with locations in Washington DC, Oregon, and Maine.