I will fix node js bugs express routing and mongodb errors

H
hasnainhyder18
H
hasnainhyder18
Hasnain Hyder
fix node js bugs express routing and mongodb errors
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fix node js bugs express routing and mongodb errors
Full Screen
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fix node js bugs express routing and mongodb errorsfix node js bugs express routing and mongodb errorsfix node js bugs express routing and mongodb errors

About this gig

If your Node.js server is crashing, your APIs are returning 500 errors, or your database queries are stuck, I am here to help you deploy a clean fix today.

I am a backend engineer with hands-on experience building and debugging scalable Node.js applications. I don't just patch errors blindly; I find the root cause of the issue, optimize the logic, and ensure it doesn't break your system again.

What I deal with every day:

  • Server & Runtime Bugs: Fixing unhandled promise rejections, memory leaks, npm version mismatches, and .env setup issues.
  • API & Route Debugging: Fixing broken Express.js routes, CORS policy issues, incorrect JSON formatting, and body-parser errors.
  • Auth & Middleware: Troubleshooting JWT token expiration, passport.js strategies, and custom middleware blockages.
  • Database Queries: Optimizing slow MongoDB/Mongoose aggregations, fixing PostgreSQL/MySQL connection pools, and schema validation bugs.
  • Deployment & Logs: Reading PM2 logs, fixing Heroku/AWS/DigitalOcean deployment errors.

Please send me a message with your error logs before placing an order. Let's get your backend running smoothly!

  • Platform

    • Other

  • Website type

    • E-Commerce store
    • Business

  • Programming language

    • JavaScript
    • Other
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Get to know Hasnain Hyder

Hasnain Hyder

Backend Developer

  • FromPakistan
  • Member sinceFeb 2023
  • Avg. response time1 hour

  • Languages

    Sindhi, Urdu, English
Hi, I'm Hasnain, a full-stack web developer specializing in backend engineering and API architectures. My core expertise lies in Node.js, Express, and MongoDB. I deliver clean, highly optimized, and deeply structured code to solve complex technical challenges. Whether you need custom REST API integrations, seamless web scraping scripts, fast third-party software setups, or emergency backend bug fixing, I am here to help. I guarantee clean communication, rapid deployment, and high-quality results. I have completed multiple backend projects focusing on speed and delivery.

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