David
Lai
Developer · Designer · Creator
I build tools at the intersection of AI and real-world domains — from literary analysis and environmental tracking to child safety and aquaculture genetics.
Expertise
Multi-Model AI Orchestration
Unified interfaces across Claude, GPT-4, Gemini, and Perplexity — vision analysis, embeddings, and system prompt engineering.
Knowledge Graphs
Neo4j graph databases modeling complex relationships — character networks, narrative arcs, environmental impact chains.
Vector Search & RAG
Pinecone and pgvector for semantic search, advanced chunking strategies, and retrieval-augmented generation.
Full-Stack TypeScript
Next.js App Router, React 19, Supabase (PostgreSQL, Auth, Realtime, Row-Level Security), and static/server rendering.
Real-Time Processing
Python Celery workers, Redis job queues, WebSocket connections, and long-running background pipelines.
SaaS & Payments
Stripe subscriptions, freemium tier design, webhook handlers, and usage-based monetization.
DevOps & Deployment
Docker containers, Traefik reverse proxy with auto-SSL, GitHub Actions CI/CD, and self-hosted VPS.
AI Media Generation
Image, video, voiceover, and music pipelines — from narrative analysis to cinematography prompts and automated production.
Selected Work
AI & Knowledge Platforms
AI Management System — Demo
Manufacturing knowledge platform combining vector search and Neo4j knowledge graphs for cross-site incident analysis, expert discovery, and supply chain impact
Analyze My Narrative
AI literary analysis generating 10 interactive knowledge graphs for narrative structure, with video production and multi-model orchestration
Sustainability Action Hub
Environmental impact platform with AI-driven insights, Neo4j knowledge graphs, and real-time Celery background workers
Consumer & Family
AIforChildren.net
COPPA-compliant supervised AI for children with multi-provider LLM support, 3-layer content filtering, and parental monitoring
TroubleshootMyPrinter.blog
AI printer troubleshooting with multi-model consensus (Claude, GPT-4o, Gemini), live video analysis, voice interaction, and programmatic SEO at scale
Nature & Growing
FishBreeding.app
Vision AI breeding tracker using Claude to analyze fish across 30 anatomical zones with genetic trait inheritance mapping
Living Yard App
Sustainable yard design and management with native planting recommendations and garden planning
Small Grower Software
Comprehensive nursery management for small-scale plant growers with inventory and propagation tracking
Native Plant Nursery Near Me
Directory for discovering native plant nurseries across regions with search and filtering