Founding 3D Rendering Engineer (AI)

Location: Union Square, New York City, USA; most roles require in-person work at the NYC HQ.

Compensation: $175K–$300K annually, plus equity.

Company

hirify.global is an AI video company building creative tools, multimodal agents, generative video models, and the Tesseract video-editing engine and APIs.

What you will do

• Define the architecture for photorealistic 3D rendering across ray tracing, rasterization, denoising, and Metal, Vulkan, Direct3D, and WebGPU.
• Build physically based light transport, materials, lights, cameras, global illumination, reflections, refraction, soft shadows, and volumetric effects.
• Own image quality through sampling, antialiasing, accumulation, denoising, firefly suppression, and deterministic video-export frames.
• Scale scenes with acceleration structures, instancing, culling, and memory management for millions of triangles and tens of thousands of objects.
• Integrate 3D with Tesseract’s video, motion graphics, compositing, ACES color-management, and render-pass pipelines.
• Design robust, predictable rendering APIs and workflows for people and AI agents, including profiling, batch rendering, validation, and render-cost estimation; collaborate with engine, product, and AI teams and help grow the 3D rendering team.

Requirements

• Deep production experience building physically based renderers, including film or offline renderers, path tracers, or game engines with ray-traced or hybrid lighting.
• Strong command of light transport, the rendering equation, Monte Carlo integration, importance sampling, material models, and denoising.
• Hands-on GPU ray-tracing experience, including BVH acceleration structures, Metal ray tracing, Vulkan ray tracing, DXR, or compute-based fallbacks.
• Understanding of modern rasterization pipelines and hybrid rasterization and ray-tracing renderers.
• Hands-on experience with Metal, Vulkan, Direct3D, or WebGPU, including compute shaders, GPU profiling, and GPU debugging.
• Proficiency in Rust or C++, with strong reasoning about memory, concurrency, and performance.
• Strong foundations in linear algebra, geometry, probability, and sampling, plus the ability to diagnose and fix causes of visual non-realism.
• Experience owning complex technical projects and making architectural decisions in ambiguous problem spaces.

Nice to have

• Experience with production renderer or engine internals such as Cycles, Arnold, RenderMan, V-Ray, Karma, Unreal Engine Lumen or Path Tracer, or Unity HDRP.
• Experience building or integrating ML denoisers or neural rendering.
• Experience with ACES, OpenColorIO, HDR output, or film-look pipelines.
• Experience with cross-platform graphics abstractions such as wgpu, including extending them for ray tracing.
• Experience optimizing rendering for Apple silicon or mobile GPUs.
• Experience with Rust, video compositing, or integrating 2D and 3D rendering in creative tools.

Culture & Benefits

• Medical, dental, and vision plans.
• 401(k) with employer match, commuter benefits, and generous PTO.
• Catered lunch several days per week, dinner stipend for late work, and Grubhub subscription.
• Health and wellness perks.
• Multiple team offsites per year and monthly team events.