Senior WebGL/Three.js Engineer

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

Company: Ctruh

Location: Bangalore

Role Overview

We're 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 you'll 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 You'll Build

• 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
• Performance Optimization:
• Optimize 3D asset loading for near-instant initial render
• Implement LOD systems, shader optimization, and efficient 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
• 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
• 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
• 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
• 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

• 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

• Frontend & Web
  
  

JavaScript / TypeScript

React, Next.js, familiarity with Vue

Webpack, Vite, Rollup

Jest, Cypress

• Performance
  
  

Chrome DevTools, WebGL Inspector, GPU profilers

Draco, meshoptimizer, KTX2/Basis

Cloudflare, AWS CloudFront

• Collaboration
  
  

Git/GitHub

Technical documentation: shaders, specs, APIs

What We're Looking For

• Must-Haves:
• 5-8+ 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
• 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 You'll 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. You've built custom rendering systems without relying on frameworks. You're 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.

To Apply

Please provide:

• Your resume/CV with links to your portfolio or live demos
• Examples of 3D web projects you've built (live site links preferred)
• Your GitHub profile or code samples showcasing graphics or WebGL work
• A short note on your most technically challenging graphics project and why you're excited about Ctruh