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I will fix your react, next js, node js and mern bugs
Khuram Mirza
About this gig
Is your React, Next.js, Node.js or MERN app throwing errors, breaking after deployment, failing API calls, or behaving unexpectedly?
Ill diagnose the root cause and fix the issue cleanly not just patch the symptom.
What I can fix:
- React & Next.js bugs, runtime errors, routing and rendering issues
- Node.js & Express API, middleware and backend errors
- MongoDB/database and data-fetching issues
- Authentication and login problems
- Tailwind CSS, responsive UI and component bugs
- TypeScript, state-management and integration issues
- Vercel/Netlify deployment and build errors
- Performance and slow-loading issues
My process:
- Reproduce and diagnose the issue
- Trace the root cause across frontend, API and database
- Implement and test the fix
- Explain what was fixed and provide the updated code
Ive worked on complex Next.js applications, including a 200+ page dynamic travel platform and custom MongoDB admin panels.
Please message me before ordering with the error, screenshot/video, repository and steps to reproduce. Ill review the scope and recommend the right package or a custom offer.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Khuram Mirza
Khuram Mirza
Full Stack Developer specializing in MERN, Next js and AI
- FromPakistan
- Member sinceMar 2025
Languages
Urdu, English, Hindi
🚀 Next.js & MERN Stack Specialist 🚀
I'm a full-stack developer specialising in MERN and Next.js. I build custom web applications with practical AI integration - authentication, databases, REST APIs, admin dashboards, and AI features that do real work inside the product, not just a chat box
Specialties:
✅ Custom Admin Panels & Dashboards
✅ Full-Stack Booking & E-commerce Systems ✅ High-Performance Landing Pages
✅ REST APIs & Supabase Integration
✅ Bug Fixes & Performance Tuning
✅ AI integration: Custom APIs, chatbots, and agents
📩 Need a modern, fast, and reliable app? Let's talk!
My Portfolio
FAQ
What types of bugs can you fix?
React, Next.js, Node.js, Express, MERN, API, database, authentication, TypeScript, Tailwind, routing, deployment and performance-related issues.
Can you fix both frontend and backend bugs?
Yes. I can trace issues across the React/Next.js frontend, Node.js/Express backend, APIs and supported databases.
Will you deploy the fix to my live server?
This gig covers fixing the bug and delivering the updated code. Deployment to your server (e.g., Vercel, Netlify, AWS) can be included as a Gig Extra. Please message me about this.
Can you work on a project you didn't build?
Yes. Send the repository and a clear description of the problem. I can first review the relevant code and reproduce the issue before making changes.
What if my bug is more complex than the package?
Message me before ordering. I'll review the scope and recommend the appropriate package or send a custom offer.
What do you need from me?
Usually the repository or relevant code, error message/logs, steps to reproduce the issue, expected behavior and actual behavior. A screenshot or short video is helpful when applicable.
Will you explain what caused the bug?
Yes. I aim to identify the root cause and can explain what was wrong and what was changed.
