Stealth Startup
GNC Engineer, Simulation and Modeling
Stealth Startup - El Segundo, California, United States, 90245
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Senior Software Engineer, Simulation and Modeling
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Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google We are a stealth-mode Aerospace & Defense startup headquartered in El Segundo, CA. Our founding team hails from SpaceX, Anduril, and Lockheed Martin, and we are backed by Joint Staff-level military leadership and several Silicon Valley firms. With a world-class business development & leadership team already in place, we are well positioned to capitalize on already overwhelming demand . Job Overview : As a Senior Software Engineer focused on Simulations, you will lead the development of high-fidelity physics-based simulations for end-to-end missile flight and guidance validation. These simulations serve as a digital proving ground for our flight software, autonomy stack, and control systems—enabling us to iterate rapidly and validate in silico what would otherwise require expensive, slow, or impossible real-world testing. You’ll own simulation architecture, real-time physics integration, and testbed development. If you’re comfortable writing performant simulation code in Rust and Python, and you’re looking to do impactful work on a system that must work the first time, this is your chance. Key Responsibilities Design high-performance 6-DOF flight and physics simulations Build simulation components that replicate real-world dynamics and sensor behavior Integrate guidance, navigation, and control (GNC) logic into full-stack simulations Develop Monte Carlo, Hardware-in-the-Loop (HITL), and closed-loop test infrastructure Collaborate closely with flight software, autonomy, and hardware teams to ensure simulation fidelity matches real-world constraints Create tooling to support scenario authoring, data visualization, and performance analysis Own simulation pipeline performance and determinism across a wide range of conditions. Basic Qualifications: Bachelor's degree in Computer Science or a related technical field 5+ years of experience building simulations or numerical modeling frameworks Proficient in Rust and Python for performance-critical and test-driven development Understanding of rigid body dynamics, kinematics, numerical integration, and physics Experience building tools for flight dynamics, aerospace simulation, or autonomous systems Preferred Qualifications: Experience with Monte Carlo testing, sensor emulation, and closed-loop control validations Familiarity with real-time systems, latency-sensitive architectures, or distributed simulation Experience deploying or validating autonomous systems (missiles, drones, satellites, or vehicles) Familiarity with Rust game engines or physics libraries (e.g., Rapier, Bevy) Exposure to 3D rendering for simulation visualization (e.g., WebGL, OpenGL, Three.js) Contributions to aerospace open source or simulation frameworks (e.g., JSBSim, Gazebo) ADDITIONAL REQUIREMENTS: To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Seniority level
Seniority level Mid-Senior level Employment type
Employment type Full-time Job function
Industries Technology, Information and Internet, Space Research and Technology, and Defense and Space Manufacturing Referrals increase your chances of interviewing at Stealth Startup by 2x Inferred from the description for this job
Medical insurance Vision insurance 401(k) Get notified about new Software Engineer jobs in
El Segundo, CA . Don't see a job that matches your experience? Submit your resume here!
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Join to apply for the
Senior Software Engineer, Simulation and Modeling
role at
Stealth Startup Continue with Google Continue with Google Senior Software Engineer, Simulation and Modeling
Join to apply for the
Senior Software Engineer, Simulation and Modeling
role at
Stealth Startup Get AI-powered advice on this job and more exclusive features. Sign in to access AI-powered advices
Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google Continue with Google We are a stealth-mode Aerospace & Defense startup headquartered in El Segundo, CA. Our founding team hails from SpaceX, Anduril, and Lockheed Martin, and we are backed by Joint Staff-level military leadership and several Silicon Valley firms. With a world-class business development & leadership team already in place, we are well positioned to capitalize on already overwhelming demand . Job Overview : As a Senior Software Engineer focused on Simulations, you will lead the development of high-fidelity physics-based simulations for end-to-end missile flight and guidance validation. These simulations serve as a digital proving ground for our flight software, autonomy stack, and control systems—enabling us to iterate rapidly and validate in silico what would otherwise require expensive, slow, or impossible real-world testing. You’ll own simulation architecture, real-time physics integration, and testbed development. If you’re comfortable writing performant simulation code in Rust and Python, and you’re looking to do impactful work on a system that must work the first time, this is your chance. Key Responsibilities Design high-performance 6-DOF flight and physics simulations Build simulation components that replicate real-world dynamics and sensor behavior Integrate guidance, navigation, and control (GNC) logic into full-stack simulations Develop Monte Carlo, Hardware-in-the-Loop (HITL), and closed-loop test infrastructure Collaborate closely with flight software, autonomy, and hardware teams to ensure simulation fidelity matches real-world constraints Create tooling to support scenario authoring, data visualization, and performance analysis Own simulation pipeline performance and determinism across a wide range of conditions. Basic Qualifications: Bachelor's degree in Computer Science or a related technical field 5+ years of experience building simulations or numerical modeling frameworks Proficient in Rust and Python for performance-critical and test-driven development Understanding of rigid body dynamics, kinematics, numerical integration, and physics Experience building tools for flight dynamics, aerospace simulation, or autonomous systems Preferred Qualifications: Experience with Monte Carlo testing, sensor emulation, and closed-loop control validations Familiarity with real-time systems, latency-sensitive architectures, or distributed simulation Experience deploying or validating autonomous systems (missiles, drones, satellites, or vehicles) Familiarity with Rust game engines or physics libraries (e.g., Rapier, Bevy) Exposure to 3D rendering for simulation visualization (e.g., WebGL, OpenGL, Three.js) Contributions to aerospace open source or simulation frameworks (e.g., JSBSim, Gazebo) ADDITIONAL REQUIREMENTS: To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Seniority level
Seniority level Mid-Senior level Employment type
Employment type Full-time Job function
Industries Technology, Information and Internet, Space Research and Technology, and Defense and Space Manufacturing Referrals increase your chances of interviewing at Stealth Startup by 2x Inferred from the description for this job
Medical insurance Vision insurance 401(k) Get notified about new Software Engineer jobs in
El Segundo, CA . Don't see a job that matches your experience? Submit your resume here!
ML Software Engineer (L4/L5) - Media Algorithms
Santa Monica, CA $100,800 - $161,000 6 days ago Software Engineer, Game Support, Game Studio
Hawthorne, CA $129,300.00 - $223,600.00 5 days ago West Hollywood, CA $195,000.00 - $215,000.00 3 days ago Santa Monica, CA $109,400.00 - $146,700.00 1 day ago Culver City, CA $99,500.00 - $200,000.00 1 day ago Software Engineer II - Back End / ABC News
Glendale, CA $114,900.00 - $161,300.00 1 week ago Los Angeles, CA $100,000.00 - $150,000.00 2 years ago Dec 2025 New Graduate Engineer, Software (Starship)
Hawthorne, CA $120,000.00 - $145,000.00 6 days ago Los Angeles, CA $150,000.00 - $250,000.00 2 weeks ago Santa Monica, CA $160,000.00 - $170,000.00 3 months ago Backend Software Engineer, TikTok - Social User and Relation
Los Angeles, CA $119,000 - $237,500 2 weeks ago Long Beach, CA $124,000 - $158,000 2 days ago Long Beach, CA $100,000 - $125,000 1 week ago Hawthorne, CA $120,000 - $170,000 1 week ago Los Angeles, CA $120,000 - $150,000 2 weeks ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.
#J-18808-Ljbffr