3D Graphics Engineer (Three.js / WebGL)

Department: Imerza

Employment Type: Full Time

Location: Sarasota, Florida, Imerza, Remote

Key Responsibilities

• Build and maintain our real-time Three.js and React Three Fiber rendering engine.
• Implement and optimize rendering features: lighting (lightmaps, HDR and image-based lighting, ambient occlusion), anti-aliasing, materials, and post-processing.
• Integrate Gaussian splat captures alongside traditional mesh-based 3D content.
• Write and debug GLSL shaders and custom materials.
• Develop camera systems, navigation, waypoints, and scene interaction.

• Own the 3D asset pipeline: glTF and GLB optimization, Draco and mesh compression, KTX2 and Basis texture conversion, and lightmap baking.
• Profile and optimize for frame rate, memory, and load time across constrained devices (tablets, kiosks) and large displays.
• Use spatial structures (BVH) for fast raycasting, picking, and pathfinding.
• Build diagnostics and debug tooling that keep visual quality and performance measurable.

• Partner with full stack and web developers to expose clean, well-documented renderer APIs to the web app.
• Work with 3D-capture, content, and design teams to bring real spaces and designs into the engine.
• Contribute to the Nx monorepo with strong testing, code review, and documentation.
• Help define the technical direction of immersive and photoreal experiences.

• A custom Three.js rendering engine (@imerza/threejs-renderer) built on React Three Fiber and drei, mounted inside a Next.js app.
• Gaussian splatting via Spark (@sparkjsdev/spark) for photoreal capture of real-world spaces, rendered alongside traditional mesh-based content.
• glTF and GLB asset pipelines with Draco compression, KTX2 and Basis textures, baked lightmaps, and HDR image-based lighting.
• WebGL and GLSL shaders, post-processing (temporal anti-aliasing, ambient occlusion), and spatial acceleration with three-mesh-bvh.
• WebXR immersive viewing via @react-three/xr, including a 360 viewer.
• TypeScript throughout, in an Nx monorepo with pnpm workspaces.

• The React and Next.js plus Payload CMS web app that hosts and configures the renderer.
• Real-time digital-twin data streamed into scenes over MQTT.
• AWS (CDK) and Docker-based on-prem deployments.

Skills, Knowledge and Expertise

• 3 to 7+ years of professional software engineering experience, with significant time spent on real-time 3D or graphics.
• Deep proficiency with Three.js (React Three Fiber experience is a strong plus).
• Solid WebGL and GLSL shader experience.
• Strong TypeScript or JavaScript skills.
• Experience with 3D asset formats and pipelines (glTF and GLB, textures, compression).
• A strong grasp of 3D math (vectors, matrices, quaternions, transforms, and cameras).
• Experience profiling and optimizing rendering performance and memory usage.
• A strong eye for visual quality, lighting, and detail.
  
  

• Gaussian splatting or radiance fields (Spark, Luma, 3D Gaussian Splatting, or NeRF-adjacent work).
• Experience with KTX2 and Basis, Draco, or meshopt compression.
• PBR materials, baked lighting and lightmap workflows, and HDR or image-based lighting.
• WebXR, VR, or AR (@react-three/xr or similar).
• Familiarity with DCC tools (Blender, 3ds Max, Maya) and capture or photogrammetry pipelines (RealityCapture, Postshot, and similar).
• Experience with Unreal Engine or another real-time engine.
• Experience with React, Next.js, or a monorepo (Nx, Turborepo).
• Architecture, AEC, BIM, or spatial-data background.
  
  
• Experience with PlayCanvas
  
  

What We Offer

• The opportunity to work on cutting-edge digital twin and immersive visualization technology.
• A collaborative, product-driven engineering culture.
• Competitive compensation and benefits.
• A flexible work environment with real opportunities for growth.