Vibe Chat

Overview

Vibe Chat is an AI communication coach that helps professionals write better emails, prepare for meetings, and communicate confidently in 100+ languages.

My role

I built the full-stack platform: the real-time message transport (WebSockets with a fan-out model per room), the AI persona system with per-room prompt scoping, and the moderation pipeline. I designed the frontend to keep latency invisible (optimistic UI on send, streamed AI responses with token-by-token rendering). Backend is event-driven to keep the message path short.

Stack

• Next.js
• WebSockets
• OpenAI / Anthropic APIs
• Redis (pub/sub)
• PostgreSQL

Outcome

Launched in 2025 as an experimental platform. The streaming AI response pattern was refined through live use and is now the template I reuse for other AI-chat products. End-to-end message latency remains under 100ms for human-to-human messages.

Launched: 2025