Senior Software Engineer, Distributed Simulation (C++)

Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century’s most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril’s family of systems is powered by Lattice OS, an AI-powered operating system that turns thousands of data streams into a realtime, 3D command and control center. As the world enters an era of strategic competition, Anduril is committed to bringing cutting-edge autonomy, AI, computer vision, sensor fusion, and networking technology to the military in months, not years.

ABOUT THE TEAM

The Software Integration Environment (SIE) team builds the platform Anduril uses to test software the way it will actually be flown, driven, and fought: real binaries, running on real services, under conditions we control. We provision isolated, reproducible environments for simulation and integration testing at scale, across AWS, Azure, and on-premise. The platform is used both internally by Anduril engineers and externally by our customers. Compute was the first half of that problem. The second half is the simulated world those binaries run inside — how it gets authored, how heterogeneous simulators agree on it, and how an engineer inspects and trusts what happened during a run. That is what this role owns.

ABOUT THE ROLE

We are looking for a Senior Software Engineer with deep C++ and real-time systems experience to build the simulation layer of the SIE platform. This is a systems software role: you will design and write the services that let independent simulators share one world — a common clock, a common entity namespace, and a clear model of who owns what — and the tooling that lets users author, reuse, and debug the scenarios they run. This is a new area with a wide surface. You will be one of the first engineers on it, which means you will set the technical direction, make the architectural calls, and be accountable for them. Most of your time is spent building, but not all of it: you will periodically work alongside the teams adopting the platform, onboarding Anduril business lines and integrating their simulators with it. Expect ambiguity: the standards in this domain are decades old, the implementations in the wild vary wildly in quality, and the correct design for our constraints is not written down yet. We expect you to work end-to-end — design, implement, ship, operate, and iterate.

WHAT YOU’LL DO

Design and build the C++ services that federate independent simulators into a single simulated world — time management, entity registry and ownership, join/resign lifecycle, and state distribution

Own the wire layer: protocol encoding and decoding, multicast and unicast transport, and the interoperability work required to make simulators built by different teams and vendors talk to each other

Make simulation runs deterministic and reproducible enough that a result is evidence, not a demo — including time control, replay, and the instrumentation that explains a divergence

Build and generalize the scenario and laydown authoring tooling that engineers and operators use to describe what they want to run

Build the content and resource catalogs that let users save, tag, search, and reuse environment and scenario definitions instead of rebuilding them each time

Chase down performance: profile hot paths, control allocation and copying, and hold latency and throughput budgets under load with hundreds to thousands of entities