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I will fix bugs in your react js node js and ai generated app
Muhammad Mateen
About this gig
Is your React JS or Node JS app showing errors, crashing, or not working? Did you build your app with ChatGPT, Cursor, Lovable or Bolt and now it will not run? I can find the problem and fix it fast.
Hi, I am a full stack MERN developer with AI integration experience. I fix real bugs in real projects and explain what went wrong so it does not happen again.
What I can fix:
- React JS errors, state and hooks issues, blank screen
- Node JS and Express API errors, CORS, 404 and 500 errors
- MongoDB connection and query problems
- JWT login and authentication bugs
- OpenAI, Gemini or Claude API errors in your app
- Code generated by ChatGPT, Cursor, Lovable, Bolt or v0 that is not working
- Deployment errors on Vercel, Render or VPS
What you get:
- Working fix with clean code
- Short explanation of the cause
- Support after delivery for the same issue
Why choose me:
- Reply within 1 hour
- On time delivery
- Clear communication
Please message me before ordering with your error message, screenshots and repo link so I can confirm and give you the exact price.
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 Muhammad Mateen
Muhammad Mateen
MERN Stack Developer, React JS, Node JS, Full Stack Web Developer
- FromPakistan
- Member sinceJan 2026
Languages
Urdu, English, Arabic, Spanish
Hi, I’m Muhammad Mateen, a dedicated MERN Stack Developer from Pakistan.
I specialize in building modern, responsive, and scalable web applications using HTML, CSS, JavaScript, Tailwind CSS, React JS, Node JS, Express, and MongoDB.
I focus on clean code, user-friendly UI, and high performance.
My goal is to help clients turn ideas into reliable digital solutions with on-time delivery and clear communication.
Let’s build something great together.
FAQ
Do you fix code generated by AI tools like ChatGPT, Cursor, Lovable or Bolt?
Yes. I debug, clean up and complete AI generated projects so they actually run and are ready to use.
Can you fix OpenAI or Gemini API errors in my app?
Yes. I fix API key issues, request errors, streaming problems and wrong responses in React and Node JS apps.
Which technologies do you work with?
React JS, Next.js, Node JS, Express, MongoDB, JWT, REST APIs, and deployment on Vercel, Render and VPS.
Do I get the fixed source code?
Yes, with a short explanation of what was wrong.
What if my bug is bigger than expected?
Message me first. I will check and suggest the right package or a custom offer.
