Senior Satellite Simulation & Test Software Engineer (Aerospace)

TL;DR

Senior Satellite Simulation & Test Software Engineer (C++/Python): Designing, developing, and verifying simulation environments for the TeraWave satellite communications network with an accent on flight software validation and scalable simulation models. Focus on building SIL/HIL environments, implementing deterministic lockstep simulations, and integrating spacecraft C&DH and telemetry processing.

Location: Greater Seattle Area. Must be a U.S. citizen, national, permanent resident, or lawfully admitted refugee/asylee.

Salary: $181,626 – $276,539

Company

hirify.global is developing reusable, safe, and low-cost space vehicles and systems to enable millions of people to live and work in space for the benefit of Earth.

What you will do

• Design and implement simulation software to test and verify TeraWave's flight software.
• Build scalable simulation environments supporting software-only, HWIL, and real-time environment tests.
• Collaborate with hardware and autonomy engineers to define software requirements and behavioral boundaries.
• Develop models to test FSW across a range of nominal and off-nominal operational scenarios.
• Execute software integration, verification, and validation testing using SIL and HIL environments.
• Support on-orbit operations troubleshooting and mentor junior engineers.

Requirements

• Must be a U.S. citizen, national, U.S. permanent resident (Green Card holder), or lawfully admitted refugee/asylee.
• 10+ years of experience in spacecraft, simulation, or embedded software development.
• Proficiency in C, C++, and Python with strong Object-Oriented design skills.
• Experience with deterministic lockstep simulation and HIL/SIL verification practices.
• Knowledge of IPC mechanisms (sockets, shared memory, message queues) and CI/CD pipelines.
• Understanding of flight hardware interfaces including TCP/IP, UDP, CAN, I2C, SPI, and RS-422/485.

Nice to have

• Master’s degree in Computer Science, Software Engineering, or Aerospace Engineering.
• Experience with NASA’s Trick or cFS software architecture.
• Knowledge of orbital mechanics and CCSDS standards for telecommand/telemetry.
• Familiarity with RTOS such as Linux, QNX, VxWorks, or RTEMS.
• Experience with onboard time management and GPS-disciplined synchronization.

Culture & Benefits

• Medical, dental, and vision insurance.
• 401(k) with company match up to 5%.
• Stock options for all regular employees.
• Paid Time Off: Up to 4 weeks per year and 14 company-paid holidays.
• Education Support Program and paid parental leave.