Md Sajjad H.

I build internal tools, dashboards, and AI-powered automation for startups and businesses using Next.js, TypeScript, Supabase, and modern AI APIs. My primary stack: Next.js (App Router) + TypeScript + Tailwind CSS + Supabase (PostgreSQL, Auth, Realtime, Storage). I also integrate AI models (OpenAI GPT-4o, Claude, Gemini) directly into production applications for validation, content generation, classification, and automation. What I've built recently: - A candidate management platform on Cloudflare Workers with Airtable and R2 storage, generating dynamic profile pages for a recruitment company - A payroll automation tool with OCR (Google Document AI), Flask backend, and Excel output matching exact client formatting - A billing automation system integrated with Stripe and Supabase, with a full admin dashboard - A customer management platform with AI-powered classification, SMS/email sequences, and campaign management - Multiple MCP servers for integrating AI assistants with external services - Real-time automation tools using SSE streaming, BullMQ queues, and Puppeteer I work with production-grade patterns: RLS policies, multi-tenant architectures, raw PostgreSQL (no ORMs), server-side caching, and proper CI/CD. I've handled Airtable-to-Supabase migrations, Cloudflare domain routing architectures, and Vercel deployment pipelines. If you need a full-stack developer who can take a product from idea to deployed and maintained — especially if it involves AI integration or internal tooling — message me.