Principal Physics Programmer, C++ (Modeling & Simulation)

Location: Flexible hybrid or remote work arrangement within the United States; listed locations include California, San Francisco, Houston, Mountain View, Santa Clara, and the San Francisco Bay Area.

Salary: $200,000+ annually

Company

hirify.global is hiring for work on a next-generation defense wargaming and force-design platform.

What you will do

• Architect and own the C++ runtime of a large-scale interactive wargaming platform.
• Evolve the entity-component system with data-oriented storage, lifecycle management, queries, execution graphs, and dependency-aware scheduling.
• Define and integrate physics, AI, sensor, weapon, behavior, and environment interfaces and external physics or mathematics models.
• Design deterministic simulation loops, event ordering, state transitions, replay, checkpoints, snapshots, replication, and save/restore systems.
• Build multithreaded task execution and optimize memory layout, allocation, cache locality, serialization, CPU usage, latency, throughput, and simulation rate.
• Develop spatial indexing, collision-candidate and visibility queries, networked ownership, synchronization, prediction, and state transfer.

Requirements

• Extensive professional or equivalent experience with modern C++ in performance-critical production software.
• Commercial game, game-engine, or comparable constrained real-time experience, including a shipped game, engine, platform, or interactive real-time product.
• Experience owning foundational engine systems and building or substantially extending a physics engine, simulation runtime, ECS, job system, or comparable core technology.
• Strong data-oriented design, memory layout, cache behavior, allocation, ECS, execution graphs, task systems, event systems, dependencies, or scheduling experience.
• Proven optimization against strict CPU, memory, latency, frame, or tick budgets using commercial profiling and debugging tools.
• Active Secret clearance or eligibility to obtain one is required.

Nice to have

• Experience in defense, autonomy, robotics, gaming, logistics, geospatial systems, or similarly constrained technical domains.

Culture & Benefits

• Flexible hybrid or remote work arrangement.
• Compensation is flexible for the right candidate.
• Hiring is open across mid-level through principal-level experience.