I will develop rest api backend in node js, mongodb and sql

Most apps don't break on the frontend. They break on the backend behind it: the slow query, the login that fails at 2am, the endpoint that dies under load.

That's the part I build. I'm a software engineer, four years in, most of it on Node.js and Express backends that still behave months after launch. The unglamorous stuff is what matters: the missing index, the route with no rate limit, the error nobody caught. I handle those on day one so you're not paying to rewrite in six months.

What you get:

- A REST or GraphQL API mapped to your real data, with the endpoints your frontend calls

- A database (MongoDB, MySQL, or PostgreSQL) with a schema that scales, not one you rebuild later

• Auth done properly: JWT or OAuth, signup, login, roles, password reset
• Rate limiting, validation, and sanitized data so the API holds under pressure
• Live WebSocket features: chat, notifications, live dashboards
• Swagger or Postman docs so your team integrates on day one

Send your code and I'll tell you what's worth keeping. Starting fresh? Tell me what the app should do. Message me before you order so we scope your REST API right. AI features and deployment to AWS or DigitalOcean on request.