Flight Simulation Engineer — Real-Time Dynamics

Grex Defense, Inc.; Huntsville (AL); On-site; USD 110,000 - 150,000; Full time

Job summary

Grex Defense, Inc. seeks a software engineer to build high-fidelity flight and mission simulations in a defense context. You will work on vehicle dynamics, sensors, and environmental models to support autonomy and engineering teams.

The role emphasizes real-time performance, fidelity trade-offs, and readiness for U.S. security clearance, with ITAR/EAR compliance and potential security clearance preferred.

Qualifications

• Strong software engineering (C++/Python) for real-time or physics simulation.
• Experience with flight dynamics, robotics sim, or game engines.
• Instinct for fidelity-vs-speed trade-offs.
• U.S. person status (ITAR/EAR) required.
• Eligible to obtain and hold a U.S. security clearance.
• Active security clearance preferred.

Responsibilities

• Build the simulation that lets us fly thousands of missions before we leave the ground.
• Develop high-fidelity flight and mission simulation — vehicle dynamics, sensors, and environment.
• Your work shortens the distance from idea to validated capability and makes every real flight count for more.

Skills

C++

Python

Real-time simulation

Flight dynamics

Education

Bachelor's degree in CS/CE/Robotics

Tools

ROS

Game engines

Job description

Grex Defense, Inc. seeks a software engineer to build high-fidelity flight and mission simulations in a defense context. You will work on vehicle dynamics, sensors, and environmental models to support autonomy and engineering teams.

The role emphasizes real-time performance, fidelity trade-offs, and readiness for U.S. security clearance, with ITAR/EAR compliance and potential security clearance preferred.