Role : Senior WebGL/Three.js Engineer - 3D Graphics

Company : Ctruh

Location : Bangalore

Role Overview :

Were hiring a WebGL/Three.js Engineer who is passionate about 3D rendering and browser-based visual experiences. This is a hands-on WebGL/Three.js role where youll own the rendering pipeline - from 3D asset ingestion to advanced shaders and real-time lighting.

You will build high-performance, photorealistic, and smooth 60fps experiences across devices, crafting custom rendering solutions that push the limits of WebGL.

What Youll Build :

1. 3D Rendering & Visualization:

- Develop and optimize real-time 3D viewers running at 60fps across all devices
- Implement advanced rendering : PBR, IBL, shadows, reflections
- Create custom shaders for metals, glass, fabrics, transparency, and complex materials
- Build dynamic lighting systems for photorealism
- Implement AR placement and real-world environmental rendering
- Add post-processing effects : bloom, AO, depth of field, color grading
- Build interactive 3D configurators with real-time customization

2. Performance Optimization:

- Optimize 3D asset loading for near-instant initial render
- Implement LOD systems, shader optimization, and effective resource usage
- Use compression pipelines : geometry, textures, KTX2/Basis
- Implement frustum & occlusion culling, instancing, and batching
- Profile GPU memory, draw calls, and shader performance
- Build adaptive quality settings based on device capabilities

3. 3D Asset Pipeline & Tools:

- Build loaders/parsers for glTF, USDZ, OBJ, FBX
- Implement asset optimization : UV mapping, normal maps, texture atlasing
- Create mesh-processing tools : decimation, smoothing, tangents
- Build progressive loading, caching, and streaming systems
- Develop debugging and visualization tools for asset inspection

4. Interactive Controls & UI Features:

- Implement camera systems : orbit, pan, zoom, animated transitions
- Build gestures for mobile : pinch, rotate, drag
- Create 360 product viewers with fluid interactions
- Add hotspots, annotations, measurement tools, and view presets
- Enable screenshot and recording functionalities

5. WebXR & AR Experiences:





- Implement WebXR VR/AR experiences directly inside browsers
- Build AR Quick Look integration for iOS
- Integrate AR.js / 8th Wall for seamless web AR
- Implement environment lighting estimation and hit testing
- Build cross-platform AR for iOS Android

6. Graphics Systems Architecture:

- Architect custom WebGL rendering solutions from scratch
- Build material/shader libraries and rendering modules
- Create scene graph management systems
- Build modular systems with reusable rendering utilities
- Design APIs for frontend integration and customization

Technical Stack :

1. Graphics & Rendering :

- WebGL 1.0/2.0, OpenGL ES, GLSL
- 3D formats : glTF 2.0, USDZ, OBJ, FBX, Collada
- Tools : Blender, RenderDoc, Spector.js
- Texture tools : Sharp, ImageMagick, compression utilities

2. Frontend & Web :

- JavaScript / TypeScript
- React, Next.js, familiarity with Vue
- Webpack, Vite, Rollup
- Jest, Cypress

3. Performance :

- Chrome DevTools, WebGL Inspector, GPU profilers
- Draco, meshoptimizer, KTX2/Basis
- Cloudflare, AWS CloudFront

4. Collaboration :

- Git/GitHub
- Technical documentation : shaders, specs, APIs

What Were Looking For :

1. Must-Haves :

- 5 to 8 years in graphics programming with deep WebGL/Three.js knowledge
- Strong understanding of the full rendering pipeline
- Expert in GLSL : vertex, fragment, compute shaders
- Mastery of PBR, material systems, and physically accurate lighting
- Proven experience building high-performance 3D web apps
- Strong JavaScript/TypeScript skills
- Solid understanding of 3D math : matrices, vectors, quaternions
- Experience with 3D formats, UV mapping, texture workflows
- Ability to debug GPU issues and optimize across browsers/devices
- Ability to build custom WebGL engines from scratch

2. Highly Desirable :

- Experience with Three.js/Babylon.js (plus,



not required)
- E-commerce and 3D configurator experience
- WebXR development experience
- Strong mobile optimization knowledge
- Experience with GPU compute, GPGPU
- Familiarity with Unity/Unreal internals
- Background in advanced rendering research
- Knowledge of ray tracing, path tracing
- Experience with photogrammetry or 3D scanning
- Open-source graphics contributions

Technical Challenges Youll Tackle :

- Achieving photorealistic 60fps rendering on mobile browsers
- Sub-second loading for complex 3D models
- Realistic shaders for different materials (jewelry, fabric, metal, glass)
- Adaptive rendering across low-end to high-end devices
- Seamless AR blending of virtual real environments
- Managing thousands of product SKUs with diverse materials
- Debugging GPU issues across browsers, devices, and GPU vendors

Why Join Ctruh :

- Pure graphics engineering not generic frontend work
- Solve deep rendering challenges that push WebGL limits
- Create visually stunning work seen by millions
- Work with modern WebGL 2.0 capabilities
- Freedom to experiment with advanced graphic techniques
- High-performance engineering culture
- Your rendering work directly influences customer engagement
- Access to high-end GPUs, devices, and graphics tools
- Backed by NVIDIA, Microsoft, Google

Location & Work Culture :

- Bengaluru (HSR Layout)
- 6 days a week, (5 days-in-office, Saturdays WFH)
- Culture : performance-focused, graphics craftsmanship, high attention to detail
- Small, senior engineering team with deep expertise
- Access to GPUs, testing devices, and 3D tools

Compensation :

- Competitive salary
- Stock options with 4-year vesting
- Performance-based bonuses tied to technical impact

Ideal Candidate Profile :

You think in shaders and understand the rendering pipeline end-to-end. Youve built custom rendering systems without relying on frameworks. Youre fluent in transformation matrices, BRDFs, tangent spaces, and GPU memory patterns. You ship production-quality 3D experiences, optimize relentlessly, and care deeply about visual craft, performance, and engineering precision

📌 Ctruh - Senior WebGL/Three.js Engineer - 3D Graphics (India)
🏢 Ctruh
📍 India