Principal Physics Programmer, C++ – Modeling & Simulation

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Code Metal

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2023

🚀 Aerospace

🚘 Automotive

🎖️ Defense

Aerospace • Automotive • Defense

Code Metal is a B2B software company that provides verifiable code translation and automated toolchains to convert high-level research/AI code into low-level, standards-compliant, production-ready software for mission-critical systems. It combines AI-guided translation, static analysis, automated test-generation (including MCDC), formal verification, and target-specific optimization to produce traceable, safety- and compliance-checked code (C/C++, Rust, VHDL, CUDA, OpenCL, etc. ) that can be deployed across chips and embedded platforms. The platform targets defense, aerospace, automotive, semiconductor and robotics customers who need guaranteed functional equivalence, safety compliance, and chip portability.

📋 Description

• Architect and implement the core C++ runtime behind a large-scale, interactive wargaming platform. • Own the structure, performance, and long-term health of a substantial engine codebase. • Design and evolve an entity-component-system architecture for representing large numbers of heterogeneous simulation entities. • Build data-oriented component storage, entity lifecycle management, system queries, execution graphs, and dependency-aware scheduling. • Define the engine interfaces through which physics, AI, sensor, weapon, behavior, and environmental models are registered and executed. • Create stable extension points that allow model developers to add capabilities without modifying or destabilizing the engine core. • Design simulation loops, fixed and variable time stepping, event processing, system ordering, state transitions, and deterministic replay. • Develop multithreaded and task-based execution systems that safely parallelize simulation workloads. • Optimize memory layout, allocation, cache locality, component access, serialization, and data movement. • Profile and improve CPU utilization, memory use, latency, throughput, and simulation rate against explicit performance budgets. • Build spatial indexing, broad-phase query, collision-candidate, visibility, and proximity-query infrastructure. • Integrate externally developed physics and mathematical models into a consistent, performant runtime. • Develop checkpointing, snapshotting, state replication, save-and-restore, and reproducible replay systems. • Establish clear architecture for networked and distributed simulation, including ownership, synchronization, prediction, and state transfer. • Build tooling that allows model developers to inspect entities, debug system execution, profile model cost, and understand simulation state. • Identify and eliminate architectural bottlenecks as simulation scale and model complexity increase. • Lead engine design reviews, mentor other programmers, and raise the standard for C++ architecture and performance engineering. • Remain deeply hands-on in implementation, profiling, debugging, and code review.

🎯 Requirements

• Eight or more years of professional C++ development, or equivalent experience, building performance-critical production software. • Significant experience in commercial game development, game-engine development, or a similarly performance-constrained real-time environment. • Experience shipping at least one commercial game, engine, platform, or interactive real-time product. • Demonstrated ownership of foundational engine systems rather than primarily gameplay features, scripting, tools, or application-level integrations. • Experience building or substantially extending a physics engine, game engine, simulation runtime, ECS, job system, or comparable core technology. • Expert command of modern C++, including object lifetimes, ownership, templates, concurrency, synchronization, profiling, and low-level debugging. • Strong understanding of data-oriented design, memory layout, cache behavior, allocation strategies, and performance-sensitive data structures. • Experience designing or extending an entity-component system or comparable composition-based runtime architecture. • Experience with engine loops, execution graphs, task systems, event systems, dependency management, or runtime scheduling. • Demonstrated ability to optimize against hard CPU, memory, latency, and frame- or tick-time budgets. • Experience using commercial profiling and debugging tools to diagnose CPU stalls, memory issues, thread contention, allocation problems, and cache inefficiencies. • Working knowledge of real-time physics concepts such as coordinate systems, numerical integration, collision detection, spatial partitioning, constraints, and simulation stability. • Experience designing APIs, plugin systems, SDKs, or extension frameworks used by other programmers. • Experience maintaining and improving a large C++ codebase while continuing to deliver production capabilities. • Experience leading major technical initiatives while remaining an active individual contributor. • Active Secret clearance or eligibility to obtain one. • Strongly Preferred: Experience with SIMD, GPU compute, custom allocators, job systems, lock-free structures, or platform-specific optimization. • Experience supporting very large worlds or simulations containing large numbers of active entities. • Experience with engine-level serialization, snapshotting, replay, world partitioning, or streaming. • Familiarity with aerospace, robotics, autonomy, defense simulation, HLA, DIS, or AFSIM. • Active TS/SCI clearance.

🏖️ Benefits

• Pay depends on experience, but we strive to be at the upper end of the salary range • Health care plan with 100% premium coverage, including medical, dental, and vision • 401k with 5% matching • Paid Time Off (uncapped vacation, plus sick and public holidays) • Flexible hybrid or remote work arrangement • Relocation assistance for qualifying employees