HIA Virtual Humans - 3D AI Character System

About the Project

I was initially hired via Toptal to refactor and clean up this Unity-based virtual human system, which became the foundation for all future HIA products. The system featured sophisticated 3D character animation with dynamic gesture systems, advanced lip-sync technology, and AI conversation capabilities through DialogFlow integration. After proving my value in the initial cleanup, I became the core programmer, developing key systems including the natural body language generation, multiple text-to-speech integrations, and comprehensive speech recognition. This work established the technical foundation that would later scale to serve hundreds of healthcare organizations.

Key Features

• Advanced 3D character animation system
• Dynamic gesture and body language generation
• Sophisticated lip-sync technology
• Multi-platform AI conversation integration
• Comprehensive speech recognition and TTS

My Role

• System refactoring
• Animation systems
• AI integration
• Lip-sync technology
• Gesture systems

Technical Challenges

• Refactoring complex legacy Unity codebase
• Implementing realistic lip-sync algorithms
• Creating natural gesture animation systems
• Integrating multiple AI and speech services