My Tech Stack for my 1.7M users SaaS: Built myself. No team Frontend: - Next.js - TailwindCSS - Shadcn UI - Zustand Backend: - Fastify Database: - PostgreSQL (self hosted) Authentication: - Better Auth Infrastructure: - Digital Ocean (hosting the frontend, backend, and DB) IDE: - Cursor AI Payment: - Stripe Built entirely in TypeScript Fast, scalable, and built to last.