Djordje K.

I specialize in building full-stack React + Supabase SaaS products with AI integrations for startups that want to move fast and scale properly. To ship faster, I built two internal systems: 1. React + Node.js + Supabase SaaS Starter Production-ready Supabase architecture (Auth, Postgres, Realtime, Edge Functions) with React / Next.js or Node.js. It includes Cursor rules so AI-assisted code stays maintainable. Designed to shorten the path from MVP to production. 2. Lovable → Next.js AI Converter Many founders build MVPs with Lovable but encounter SEO and scalability issues. I built an AI-powered converter that transforms Lovable React/Vite components into a clean Next.js architecture. Experience With 8+ years on Upwork, I have built and maintained SaaS platforms, Supabase systems, AI-powered applications, dashboards, and internal tools used in real production environments. Recent result: I took an EdTech SAT-prep platform from a rough prototype to a production system, including its question bank, adaptive engine, scoring pipeline, and infrastructure migration. The client awarded the project 5 stars and described me as “one of the best engineers I've worked with,” highlighting my ownership, technical judgment, communication, and focus on maintainable design. Clients hire me when they need: - A React SaaS developer - A Supabase full-stack expert - An AI-focused product engineer - Someone who takes ownership and works independently - Clear communication Tech stack Frontend: React (Server Components, Server Actions) Next.js (App Router, SSR, edge-ready apps) TypeScript Tailwind CSS TanStack Query Zustand Vite React Native + Expo Backend / full-stack: Supabase (Postgres, Auth, Realtime, Edge Functions) Node.js Express FastAPI PostgreSQL REST APIs Webhooks Stripe integrations AI: OpenAI API AI-assisted development with Cursor and Claude Code LLM integrations Infrastructure: Vercel Docker AWS Google Cloud Testing: Jest React Testing Library Playwright Cypress Ready to launch your MVP? Invite me to your job post or message me to discuss your roadmap.