Quentine Nduati
AI Product Engineer | UX-Focused Fullstack Developer
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CollabHub: Real-Time Collaborative SaaS System with Chat & Docs
CollabHub is a real-time SaaS collaboration platform unifying document editing and team communication in one system. I built a full-stack architecture using a NestJS backend with Socket.io for real-time sync, Redis caching for performance, and BullMQ for background processing of workspace invites. The web frontend uses Next.js with Mantine UI, while the mobile version is built with React Native, Expo, and Tamagui for a shared cross-platform experience.
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VerseFlow: Real-Time Verse Detection & Display System
Designed and developed VerseFlow, a real-time transcription and display system that detects spoken Bible verses during live sermons and instantly syncs them to sanctuary display screens.
Built with Next.js, Mantine UI, Node.js, Express, PostgreSQL, Drizzle ORM, Zustand, and WebSockets (Socket.io) for real-time communication between the media dashboard and public display screens.
Implemented speech recognition workflows, offline-first PWA support, intelligent verse parsing, and a human-in-the-loop confirmation system optimized for high-pressure live media environments.
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VoiceCraftAI: A Persona-Driven AI Content Engine
Designed and developed an AI-powered content generation platform focused on preserving user voice and emotional tone instead of producing generic AI outputs.
Built a full-stack system using React, Mantine UI, Node.js, Express, MongoDB, OpenAI APIs, Hugging Face models, and Zero-Shot Classification for adaptive tone analysis and personalized content generation.
Implemented streaming AI responses, persistent tone profiles, accessibility-focused UX flows, Zustand state management, and scalable AI orchestration architecture.
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