Hanif Daffa N.

I help founders turn SaaS MVPs into stable web apps with React, Node.js, and Next.js. If the product is slow or the backend is messy, I fix the APIs, the front end, and the PostgreSQL database so your team can keep building. I have completed 20+ projects on Upwork. I am Top Rated, with a 100% Job Success Score. Recent work includes a Strapi CMS connected to a web app, and a logistics app with real-time tracking. What I take on: ✔ SaaS MVPs that need a cleaner React and Next.js front end ✔ APIs in Node.js that a mobile or web team can actually integrate ✔ PostgreSQL databases, auth, and the links between the app and other services ✔ Strapi, Sanity and Payload CMS, including a client who hired me again If your MVP was built quickly with vibe coding, I clean up the existing code and make it safe for real users. I lock down who can access the database, set up Stripe payments, and keep each customer's data separate. Core Technical Stack: - Frontend: React, Next.js, Astro.js, TypeScript, Tailwind CSS - Backend: Node.js, Express.js - Headless CMS: Payload CMS, Strapi - AI Integration: OpenAI API, Claude, Gemini, RAG Architecture, LLM Integrations - Databases: Supabase, PostgreSQL, MySQL - Cloud & Deployment: AWS, Vercel, DigitalOcean Send me the repo or MVP link and a short note on what is breaking. I will tell you if I can stabilize it. Happy to do a 15-minute call. Available to start immediately.