VTuber Live Broadcasting

• Built a real-time communication engine from scratch for VTuber live broadcasting, powering an app featuring a well-known voice actress idol group in Japan.

Development

• Built a VTuber-specialized real-time communication engine from scratch through original research and development
• Full stack delivery: from the backend io_uring-based network engine to the Unity client SDK
• Recording server, archive streaming, and playback features

Results

• Low latency with 1500+ concurrent connections per CPU core
• Zero server failures since going live, handling regular cast streams and major live events

Technology

• Go, C#, io_uring

This project was built end-to-end from the network infrastructure to the client SDK, delivering a high-performance real-time communication system tailored to the business requirements.