Senior 3D / Game Developer (AI-Powered Interactive Characters)

Format: Remote | Full-time / Contract
Project: Confidential AI Product Development
Key Project Goal: Deliver a working prototype within 8–12 weeks.
Within this timeframe, you will help build five distinct interactive 3D characters featuring animations, facial expressions, lip synchronization, and dynamic interactions with users and virtual environments. The architecture should be designed to scale to 60+ characters without substantial redevelopment.

About the Project
We are building an AI-powered interactive platform featuring intelligent 3D characters capable of real-time conversations, emotional expressions, physical movements, and dynamic interactions with users and virtual environments.
Our goal is to develop a scalable character simulation system supporting dozens of unique digital characters with different appearances, behaviors, and interaction patterns.
We are looking for an experienced 3D / Game Developer who can build an initial working prototype by leveraging existing technologies, SDKs, game engines, and character animation frameworks.

Responsibilities
Develop interactive 3D characters and virtual environments.
Integrate existing 3D character assets, including rigging, animations, facial expressions, and lip synchronization.
Implement character movements, gestures, emotional expressions, and interactions with virtual objects.
Integrate AI-driven character actions and behavioral states.
Evaluate game engines, character creation tools, animation libraries, and AI NPC SDKs.
Build reusable character components to support rapid creation of new characters.
Optimize rendering and performance for web-based applications.
Integrate real-time character interactions in collaboration with AI engineers.
Contribute to technical architecture and prototype development.

Required Experience
3+ years of commercial experience with Unity, Unreal Engine, Three.js, or similar 3D technologies.
Strong understanding of character animation, skeletal rigs, animation state machines, and facial animation.
Experience integrating third-party 3D assets and animation libraries.
Experience developing interactive characters, NPCs, avatars, or simulation environments.
Understanding of real-time rendering and performance optimization.
Experience building prototypes using existing SDKs and frameworks.
Ability to make pragmatic technical decisions and deliver functional prototypes within defined timelines.

Nice to Have
Experience with AI-powered NPCs or conversational avatars.
Familiarity with Convai, Inworld AI, or similar solutions.
Experience with Blender, Mixamo, Character Creator, or equivalent tools.
Familiarity with WebGL / WebGPU, React Three Fiber, or PlayCanvas.
Experience with audio-driven facial animation and lip synchronization.
Experience with multi-character simulation systems.