C++ Simulation Engineer — High-Performance Vehicle Dynamics

SpaceX; Redmond (WA); On-site; USD 125,000 - 200,000; Full time

Benefits offered by this job

Medical, Vision & Dental coverage

401(k) retirement plan

Stock options / long-term incentives

Paid parental leave

3+ weeks paid vacation + holidays

Shuttle service Seattle↔SpaceX Redmond

Job summary

SpaceX is hiring a Software Engineer, C++ Simulations (Starlink), in Redmond to architect, refactor, and build high-performance C++ core infrastructure for the Starlink vehicle dynamics simulator and associated environments.

You will own the design and evolution of the simulation backbone, drive major refactors, and work across teams to model multi-body physics and hardware representations with emphasis on speed and maintainability.

Qualifications

• Bachelor’s degree in a STEM field and 1+ years of software development experience, or 4+ years of professional C++ experience.
• Expert-level C++ with focus on performance, memory management, and concurrency.
• Experience with high-performance simulations or real-time systems.
• Strong communication skills to coordinate with partner teams.

Responsibilities

• Lead the design, major refactors, redesigns, and ongoing evolution of the core C++ vehicle dynamics simulator and associated testing/support infrastructure for Starlink, ensuring it scales in performance and capability with the constellation.
• Architect and improve high-performance C++ Monte Carlo simulation infrastructure, including parallelization, dispersion handling, and reliability for large-scale runs.
• Drive development of new simulation features, models, and tooling in collaboration with users—focusing on performance, usability, and extensibility of the C++ core.
• Own performance optimization, profiling, continuous integration, unit/integration testing, and reliability improvements across the simulation stack.
• Design and implement new testing frameworks, support infrastructure, and visualization components to accelerate GNC development.
• Collaborate cross-functionally to accurately model multi-body physics, environmental effects, and hardware behaviors while maintaining rigorous software quality.

Skills

Expert-level C++

Multithreading

Monte Carlo simulations

Performance optimization

Numerical methods

GNC data visualization

Education

Bachelor’s degree in STEM

Tools

Testing frameworks

CI pipelines

Visualization tooling

Job description

SpaceX is hiring a Software Engineer, C++ Simulations (Starlink), in Redmond to architect, refactor, and build high-performance C++ core infrastructure for the Starlink vehicle dynamics simulator and associated environments.

You will own the design and evolution of the simulation backbone, drive major refactors, and work across teams to model multi-body physics and hardware representations with emphasis on speed and maintainability.