Senior Software Engineer, Simulation Platform

Anduril Industries•Costa Mesa, CA

About The Position

Platform work is leverage. Every API you design, every millisecond you shave off the frame loop, every rough edge you smooth in the developer experience — it multiplies across every model, every scenario, and every engineer which builds atop Anduril’s mission simulator. You'll work on a genuinely complex system (real-time, multi-domain, deterministic, plugin-extensible) where architectural decisions have concrete, measurable consequences and correctness matters. The simulator is how Anduril tests autonomy before it touches hardware, how operators train on mission scenarios, and how engineers validate that sensors and platforms behave as expected. This platform is what makes that possible at scale. This role is open to senior engineers and strong mid-career engineers who are ready to own significant pieces of a complex system. If you've spent your career building applications and want to shift toward framework and infrastructure work, this role is for you!

Requirements

3 years of professional experience with C++20 and strong C++ skills; you should be comfortable with templates, move semantics, smart pointers, and the kinds of design decisions that show up in framework code
Experience designing internal APIs and frameworks that other engineers build on — you care about backwards-compatibility, ergonomics, not just correctness
Solid understanding of systems programming fundamentals: memory management, shared libraries, ABI stability, linking, and platform-level concerns
Comfort with linear algebra and applied math
Familiarity with Linux based C++ development toolchains
Ability to reason about performance-sensitive code--cache behavior, memory layout, algorithmic complexity
Clear technical communication and ability to work in a large, shared codebase with architectural decision making that impacts a growing team
Eligibility to obtain and maintain an active U.S. Government Secret security clearance

Nice To Haves

5+ years of professional experience with C++20
Experience with military simulation, defense modeling & simulation (M&S), or related domains
Experience with Entity-Component-System architectures or game engine design patterns
Familiarity with gRPC, DIS (IEEE 1278.1) distributed simulation standard
Experience with Python/C++ interop (pybind11, embedded interpreters)
Familiarity with behavior trees or autonomous agent architectures
Exposure to Nix for reproducible builds
Experience with numerical simulation, physics modeling, or scientific computing

Responsibilities

Performance and scale — keep the simulation loop fast enough for real-time and faster-than-real-time execution with hundreds of concurrent entities; reasoning about memory layout, cache behavior, and contention as entity counts grow
Custom Entity-Component-System architecture that underpins the entire simulator: entity lifecycle, component storage, system registration, and the update loop
Plugin and SDK development: maintain a versioned C ABI, enabling external teams to extend the simulator
Integration architecture: gRPC services, DIS protocol interoperability, networking messaging, and file recording for playback
Support domain experts in integrating new and enhancing existing capability models

Benefits

Healthcare Benefits
US Roles: Comprehensive medical, dental, and vision plans at little to no cost to you.
UK & AUS Roles: We cover full cost of medical insurance premiums for you and your dependents.
IE Roles: We offer an annual contribution toward your private health insurance for you and your dependents.
Additional Benefits
Income Protection: Anduril covers life and disability insurance for all employees.
Generous time off: 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.
Family Planning & Parenting Support: 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.
Mental Health Resources: 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.
Professional Development: Annual reimbursement for professional development
Commuter Benefits: Company-funded commuter benefits based on your region.
Relocation Assistance: Available depending on role eligibility.
Retirement Savings Plan
US Roles: Traditional 401(k), Roth, and after-tax (mega backdoor Roth) options.
UK & IE Roles: Pension plan with employer match.
AUS Roles: Superannuation plan.