code-metal - Principal Physics Engine Programmer, C++ (Modeling & Simulation)
Requirements
• Extensive professional C++ development experience, 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, and defense simulations (e.g., HLA, DIS, OneSAF, JSAF, NGTS, STK, AFISM) • Experience supporting Air Force, Space Force, joint, or broader DoW acquisition and mission-analysis programs. • Experience developing models for sensors, weapons, electronic warfare, jamming, communications, logistics, or command and control. • Active U.S. security clearance (Secret, Top Secret, or SCI/SAP). • PRINCIPAL LEVEL EXPECTATIONS • Engineering Craft & Code Quality: Sets the quality and correctness bar across the department; their work is the example others learn from; improves the automated systems and practices that ensure quality department-wide. • Architecture & Technical Knowledge: Provides architectural guidance across the department and invents paradigms that solve CodeMetal-specific domain problems (e.g., translation, optimization, deployment across target environments); a key resource on every major system. • Delivery, Scoping & De-risking: A consistent contributor to the company's technical roadmap; gives reliable estimates for large cross-team initiatives; ensures pragmatic scoping toward the most valuable outcomes. • Technical Leadership & Mentorship: An active driver of company-wide architectural reviews and proposals; mentors mid-level and senior staff at scale; influences others across departments toward the best technical outcome.
Responsibilities
• 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.
Benefits
• Target Salary Range (Principal Physics Engine)Target Salary Range (Principal Physics Engine) $250K – $290K • Offers Equity • Upload your resume here to autofill key application fields. • Drop your resume here! • Parsing your resume. Autofilling key fields... • or drag and drop here • Other (list below) • San Francisco Bay Area • Boston, MA Area • Washington D.C. • Optionally, ad a cover letter or any additional information you'd like to share • Do you presently hold an active U.S. security clearance, or are you eligible to obtain and maintain a U.S. security clearance? • For more information about U.S. Security Clearances: click here. • Yes, I Hold An Active U.S. Security Clearance • Yes, I am Eligble to obtain an U.S. Security Clearance • We'd love a brief answer about why you'd like to work with us! • Decline to self-identify • Hispanic or Latino - A person of Cuban, Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin regardless of race. • Hispanic or Latino • White (Not Hispanic or Latino) - A person having origins in any of the original peoples of Europe, the Middle East, or North Africa. • White • Black or African American (Not Hispanic or Latino) - A person having origins in any of the Black racial groups of Africa. • Black or African American • Native Hawaiian or Other Pacific Islander (Not Hispanic or Latino) - A person having origins in any of the peoples of Hawaii, Guam, Samoa, or other Pacific Islands. • Native Hawaiian or Other Pacific Islander • Asian (Not Hispanic or Latino) - A person having origins in any of the original peoples of the Far East, Southeast Asia, or the Indian Subcontinent, including, for example, Cambodia, China, India, Japan, Korea, Malaysia, Pakistan, the Philippine Islands, Thailand, and Vietnam. • Asian • American Indian or Alaska Native (Not Hispanic or Latino) - A person having origins in any of the original peoples of North and South America (including Central America), and who maintain tribal affiliation or community attachment. • American Indian or Alaska Native • Two or More Races (Not Hispanic or Latino) - All persons who identify with more than one of the above five races. • Two or More Races • Hispanic or Latino • White (Not Hispanic or Latino) • Black or African American (Not Hispanic or Latino) • Native Hawaiian or Other Pacific Islander (Not Hispanic or Latino) • Asian (Not Hispanic or Latino) • American Indian or Alaska Native (Not Hispanic or Latino) • Two or More Races (Not Hispanic or Latino) • I identify as one or more of the classifications of protected veteran listed above • I am not a protected veteran
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