Software Engineer - Simulation Fidelity

Anduril Industries•Seattle, WA

About The Position

Anduril's TRS Simulation team owns the ecosystem, frameworks, and guidance that make simulation possible, repeatable, and scalable across the Tactical Recon & Strike business line. We don't just run sims, we define what it means for a simulation to be trustworthy. Our team operates across four pillars: Sim Infrastructure, Sim Fidelity, Sim Integrations, and Training Simulations, supporting products like Altius, Ghost, Bolt, and Anvil from early development through field deployment. Every fidelity improvement, every validated model, and every simulation environment we deliver directly determines whether autonomous systems are ready to fly real missions. Our vision is one simulation framework that serves every product and every deployment target, from a developer's laptop through CI pipelines, operator training environments, and large-scale HPC Monte Carlo campaigns. The same declarative workspace definition can be composed, extended, and deployed wherever simulation is needed, so teams spend their time on mission problems instead of reinventing infrastructure.

Requirements

Bachelor's degree in Computer Science, Engineering, Physics, Mathematics, or a related field.
At least 3+ years of professional software engineering experience with a systems language (C++, Rust) and an analysis/scripting language (Python, MATLAB).
Experience with performance analysis and optimization of complex software systems (profiling, bottleneck identification, latency reduction, computational efficiency).
Comfort with numerical and scientific computing concepts (integration methods, statistical analysis).
Demonstrated ability to take deep ownership of a system end-to-end: understand it, identify problems, design solutions, implement them, and validate the results with data.
Experience building or maintaining automated test/validation infrastructure that enforces correctness over time.
Track record of working effectively across team boundaries, particularly with domain experts whose systems you need to understand and integrate with.
Ability to quickly understand and navigate complex systems and established code bases.
A desire to work on critical software that has a real-world impact.
Eligible to obtain and maintain an active U.S. Secret security clearance.
5+ years of professional software engineering experience.
Experience driving technical strategy and making architectural decisions that affect multiple teams or systems.
Track record of mentoring engineers and raising the bar for engineering practices within a team.

Nice To Haves

Master's degree or PhD in a relevant field.
Experience working with simulation frameworks, game engines, physics engines, or real-time systems.
Experience with Monte Carlo methods, parameter sweeps, or statistical validation campaigns.
Familiarity with flight dynamics, control systems, sensor modeling, or other aerospace-adjacent domains (even at a high level).
Experience with modern build and deployment tooling (Nix, Docker, CI/CD systems).
Background in academic research or computational science with a transition (or desire to transition) into applied software engineering.
Experience with data pipelines for comparing simulation output against real-world reference data.
Familiarity with HPC environments (SLURM, containerized workloads, cluster computing).
A bias toward rapid delivery and iteration.

Responsibilities

Analyze simulated subsystems within the framework to identify where system-level behavior diverges from real-world data, quantifying gaps and their downstream impact on simulation trustworthiness.
Partner with functional engineering teams (flight dynamics, perception, guidance, comms) who own subsystem models to understand requirements, integrate their higher-fidelity models into the simulation framework, and validate the integration through statistical analysis.
Engineer framework-level solutions that enable higher-fidelity models to run efficiently, addressing performance constraints, timing coordination, and numerical integration concerns.
Build and maintain validation tooling and benchmarks that make fidelity measurable: automated comparison against real-world data, regression detection, and acceptance threshold enforcement.
Design and run Monte Carlo validation campaigns to verify that fidelity improvements hold across parameter sweeps and edge cases, not just nominal conditions.
Work across faster-than-real-time simulation and software-in-the-loop (SITL) environments, understanding the performance and fidelity trade-offs at each tier.
Identify opportunities where industry-standard or academic approaches could improve our simulation strategy, and coordinate with the appropriate domain teams to evaluate and adopt them.
At the senior level: drive cross-cutting fidelity strategy across the simulation stack, mentor other engineers, and represent the fidelity team's technical perspective in cross-functional design reviews.

Benefits

Comprehensive medical, dental, and vision plans at little to no cost to you.
Life and disability insurance for all employees.
Highly competitive PTO plans with a holiday hiatus in December.
Caregiver & Wellness Leave is available to care for family members, bond with a new baby, or address your own medical needs.
Coverage for fertility treatments (e.g., IVF, preservation), adoption, and gestational carriers, along with resources to support you and your partner from planning to parenting.
Access free mental health resources 24/7, including therapy and life coaching.
Additional work-life services, such as legal and financial support, are also available.
Annual reimbursement for professional development.
Company-funded commuter benefits based on your region.
Relocation Assistance: Available depending on role eligibility.
Traditional 401(k), Roth, and after-tax (mega backdoor Roth) options.