Full-Stack Web & SaaS Platforms - Professional

Usually both. Next.js handles the product UI, marketing pages and SEO with server components on Vercel. NestJS runs the API: auth, roles, billing webhooks, background jobs and anything a mobile app or third party also needs. For a very small product I will keep everything in Next.js route handlers to save cost; once you have webhooks, queues or multiple clients, a separate NestJS service with PostgreSQL and Prisma pays for itself.

Supabase is a great fit for early products: managed Postgres, auth, storage and row-level security without running a server, and I build on it often. A custom NestJS backend earns its place when you need complex business logic, multi-tenant isolation, job queues, Stripe billing flows or an API other teams consume. I will recommend whichever keeps your first year cheaper and simpler, and both can be migrated later.

I'm a freelance AI product developer from Rajshahi, Bangladesh, working under the name Mursalin's Desk. I build AI agent SaaS products, AI-powered mobile apps with React Native and Expo, MVPs for startups, AI integrations for existing products, and full-stack web platforms on Next.js, NestJS and PostgreSQL. I also take on AI strategy and fractional CTO engagements for founders who need senior technical leadership without a full-time hire.

I'm based in Rajshahi, Bangladesh, and also work from Dhaka. Most of my clients are remote — startups and small companies in the US, UK, Canada, Australia and the EU. I can meet in person in Rajshahi or Dhaka when that helps, but every project I run is set up to work fully remotely from day one: shared repo, project board, async updates and scheduled calls.