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I will create node js express rest API with mongodb and fix API bugs
Darshan Patel
About this gig
Is your API slow, unsafe, or crashing when more users join?
AI tools make it easy to build an app fast, but the backend is often where things break. Pages take seconds to load, the server goes down under traffic, or secret keys sit in the code where anyone can find them.
I build and fix Node.js REST APIs that are secure, fast and scalable.
Problems I solve:
- My API is slow: I find the bottleneck and fix it with query optimization, indexing and Redis caching
- My server crashes with more users: I make your backend scalable and ready for real traffic
- Is my API secure?: JWT auth, rate limiting, input validation and safe secret keys
- My AI-generated code has bugs: I clean it up and make it production-ready
- I need new APIs: REST API development with Node.js, Express.js and MongoDB/Postgress
- I cant connect this service: API integration with Stripe, OpenAI, Twilio and webhooks
You get:
- Clean source code with simple comments
- A Postman collection to test every API
- A before/after speed report for performance optimization work
Share your problem or error. Ill tell you honestly what it needs before you order.
Get to know Darshan Patel
Darshan Patel
Full stack developer a expert in Nodejs, React, Angular and Nextjs
- FromIndia
- Member sinceDec 2023
- Avg. response time1 hour
Languages
Hindi, Gujarati, English, German
Hi, I’m Darshan, a Full-Stack Web Developer with 3+ years of experience.
I specialize in MERN Stack (MongoDB, Express.js, React.js, Node.js), MySQL, REST API development, API integrations, and AWS deployment. I help businesses build secure, scalable, and high-performance web applications.
Services:
Custom websites & web apps
Node.js backend & API development
MongoDB / MySQL database integration
Bug fixing & performance optimization
AWS server & cloud setup
Automation using power automate & other
Let’s discuss your project and get started!
My Portfolio
Other Software Development Services I Offer
FAQ
What technologies do you use for backend development?
I use Node.js and Express.js for the backend, with MongoDB, MySQL or PostgreSQL for the database. For login I use JWT, I test every API in Postman, and I can deploy with Docker on a VPS, Render or AWS.
Can you create CRUD APIs for my web or mobile app?
Yes. I build CRUD APIs (create, read, update, delete) for any web app or mobile app, including React, Next.js, React Native and Flutter apps. Just share your screens or a list of features.
Can you fix my existing Node.js API?
Yes. Send me the error message and some details about your project. Small bug fixes usually fit the Basic package, and I’ll tell you before you order if it needs more time.
Which third-party APIs can you integrate?
Stripe, Razorpay, PayPal, Twilio, OpenAI, Firebase, and almost any REST API that has documentation. I also set up webhooks so your app gets updates automatically, for example when a payment succeeds.
Will my API be secure?
Yes. I use JWT authentication, hashed passwords, input validation, rate limiting, and environment variables for secret keys. Your API will follow common security practices from day one.
Can you add realtime features like chat or live updates?
Yes. I have hands-on experience with Socket.io, mqtt and WebSockets, so I can add live chat, notifications or live data updates to your Node.js backend.
Do you provide documentation and support after delivery?
Yes. You get a Postman collection and a simple setup guide. I also fix any bug in my code free for 7 days after delivery.
