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 ROLEWe 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 DODesign 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 distributionOwn 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 otherMake simulation runs deterministic and reproducible enough that a result is evidence, not a demo — including time control, replay, and the instrumentation that explains a divergenceBuild and generalize the scenario and laydown authoring tooling that engineers and operators use to describe what they want to runBuild the content and resource catalogs that let users save, tag, search, and reuse environment and scenario definitions instead of rebuilding them each timeChase down performance: profile hot paths, control allocation and copying, and hold latency and throughput budgets under load with hundreds to thousands of entitiesIntegrate with the rest of the platform — the Go services that provision and schedule compute, the gRPC/protobuf APIs that expose it, and the web UI the team ownsSet the technical direction for this area, write the design docs that make it reviewable, and raise the bar through code review and mentorship as the team growsPartner with Anduril business lines when they onboard onto the platform — work alongside their engineers to get their simulators, models, and test workflows integrated, and stay with them until it works in their hands and not just yoursReduce the cost of that onboarding over time by turning the integration work you do by hand into documentation, reference integrations, and SDKs, so the next team can self-serveWork directly with the internal teams and external customers who need this, and convert what they tell you into shipped capabilityREQUIRED QUALIFICATIONS7+ years of professional software engineering experienceDeep, current production experience in modern C++ (C++17 or newer) — you are fluent in ownership and lifetime, move semantics, templates, and the standard libraryExperience building networked, concurrent, or real-time systems in C++, including multithreading, synchronization, and the failure modes that come with themStrong systems fundamentals: memory layout and allocation behavior, cache effects, sockets and UDP/TCP, serialization, and LinuxDemonstrated ability to profile and optimize a real system, and to reason about latency and throughput with numbers rather than intuitionExperience owning an ambiguous, cross-cutting project end-to-end and driving it to productionExperience working directly with the engineering teams who consume what you build — integrating them, unblocking them, and taking their feedback into the next versionComfortable working in at least one other language alongside C++ — the surrounding platform is Go and TypeScript, and you will touch bothStrong written and verbal communication — you can write a design document that a skeptical reader can evaluateComputer Science degree or equivalent industry experienceEligible to obtain and maintain an active U.S. Secret security clearancePREFERRED QUALIFICATIONSYou have a bias for action and taking ownership. You have a track record of fixing a problem when you see one, including problems that are not formally yours.Experience with distributed simulation and interoperability standards — DIS (IEEE 1278), HLA/RTI (IEEE 1516), TENA, or equivalent proprietary federation layersExperience with simulation engines, physics or flight dynamics models, game engines, or discrete-event and time-stepped simulation frameworksExperience with software-in-the-loop or hardware-in-the-loop test systems, robotics simulation, or synthetic environments used for test and trainingExperience making a distributed system deterministic or reproducible, including logical clocks, lockstep execution, or record and replayExperience with gRPC/protobuf, or with designing binary protocols and schema evolutionExperience running C++ services on hardware or containers on Kubernetes, or otherwise operating what you buildExperience or interest working in monorepos with modern build systems like Bazel, Buck, Nix, etc. (we use Bazel)Experience with virtualization or hypervisor technologies (KubeVirt, qemu)Experience with GPU programming, rendering, or geospatial and terrain dataExperience building developer tooling or a platform product with real users, and iterating on their feedbackAn active U.S. Secret or higher security clearanceUS Salary Range$191,000—$253,000 USDThe salary range for this role is an estimate based on a wide range of compensation factors, inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Anduril's total compensation package. Additionally, Anduril offers top-tier benefits for full-time employees, including: BenefitsAt Anduril, we invest in our people. Our comprehensive, competitive benefits package (available at little to no cost to employees) ensures you’re supported in health, recovery, and whatever comes next. For more information, Explore Our Benefits.Protecting Yourself from Recruitment ScamsAnduril is committed to maintaining the integrity of our Talent acquisition process and the security of our candidates. We've observed a rise in sophisticated phishing and fraudulent schemes where individuals impersonate Anduril representatives, luring job seekers with false interviews or job offers. These scammers often attempt to extract payment or sensitive personal information.To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind:No Financial Requests: Anduril will never solicit payment or demand personal financial details (such as banking information, credit card numbers, or social security numbers) at any stage of our hiring process. Our legitimate recruitment is entirely free for candidates.Please always verify communications:Direct from Anduril: If you receive an email from one of our recruiters, it will only come from an @anduril.com address.Via Agency Partner: If contacted by a recruiting agency for an Anduril role, their email will clearly identify their agency. If you suspect any suspicious activity, please verify the agency's authenticity by reaching out to View email address on us.fitly.work. Exercise Caution with Unsolicited Outreach: If you receive any communication that appears suspicious, contains grammatical errors, or makes unusual requests, do not engage. Always confirm the sender's email domain is @anduril.com before providing any personal information or clicking on links.What to Do If You Suspect Fraud: Should you encounter any questionable or fraudulent outreach claiming to be from Anduril, please report it immediately to View email address on us.fitly.work. Your proactive caution is invaluable in protecting your personal information and upholding the security and trustworthiness of our recruitment efforts.Data PrivacyTo view Anduril's candidate data privacy policy, please visit . By submitting your application, you consent to Anduril Industries using a third-party service provider to conduct pre-employment risk, integrity, and due diligence screening and assessing potential risks as part of your application process. 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