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I will fix node js and express js errors and build rest API
Afzaal H
About this gig
Is your Node.js or Express app throwing errors, crashing in production, or returning broken API responses? I find the root cause and fix it permanently - not a quick patch that breaks again tomorrow.
I'm a MERN stack developer with hands-on experience building and debugging full-stack Node.js and Express.js applications, including authentication flows, REST API pipelines, MongoDB/MySQL integrations, and React-to-Node communication.
What I fix and build:
Node.js / Express.js crashes and runtime errors
REST API errors - CORS issues, 401/403 auth failures, broken endpoints
JWT, session, and OAuth authentication bugs
MongoDB connection errors, query failures, Mongoose issues
Middleware conflicts and routing problems
React + Node.js integration and data flow issues
Slow API response times and performance bottlenecks
Deployment issues on Vercel, Render, Railway, or custom servers
Why buyers choose me:
I debug at the root cause - no surface-level patches
I explain what caused the bug and how I fixed it, in plain English
Fast delivery, clear communication, and realistic timelines
Send me your error logs, a code snippet, or a description of the issue, and I'll tell you exactly wh
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Get to know Afzaal H
Afzaal H
MERN Stack Developer
- FromPakistan
- Member sinceJan 2026
- Avg. response time1 hour
Languages
Urdu, English
Hi, I’m Afzaal, a MERN Stack Developer specializing in building fast and scalable web applications using MongoDB, Express, React, and Node.js. I develop responsive frontends, secure backends, REST APIs, and fix bugs across the full stack. I also convert Figma/PSD designs into pixel-perfect React UIs. I focus on clean code, performance, and reliable delivery. My goal is to provide high-quality solutions and long-term support to help your business grow.
My Portfolio
FAQ
What do I need to start the project?
Just share your requirements, error details, or existing codebase (if any). I’ll analyze everything and guide you on the best solution before starting.
Can you build a complete backend API from scratch?
Yes. I can design and develop a complete Node.js backend API from scratch including clean architecture, scalable endpoints, and proper error handling.
Do you also handle database integration?
Yes, I handle full database integration including MongoDB and MySQL with proper schema design, optimization, and secure connections.
Will authentication be included in the API?
Yes, I implement secure authentication systems like JWT, sessions, and role-based access control depending on your project needs.
Can I request changes after delivery?
Yes, minor revisions are included to ensure everything works perfectly according to your requirements.
