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I will do error fixing for fullstack apps
M Mubazar
About this gig
Is your React, Node.js, or Next.js application throwing errors, crashing, or not working correctly? Ill identify the root cause and fix it quickly with clean, reliable code.
Hi, Im Muhammad Mubazar, a full-stack MERN developer specializing in debugging and troubleshooting modern JavaScript applications. I dont just patch issuesI find the actual cause and implement a permanent solution.
What I can fix:
React & Next.js bugs, hydration issues, broken UI, API integration problems.
Node.js, Express.js & NestJS backend errors, API failures, authentication issues (JWT, OAuth), middleware bugs
MongoDB & PostgreSQL problems, Errors, query optimization.
TypeScript errors, configuration issues, strict mode problems
Deployment failures all issues on Vercel, Railway, AWS, etc.
Dependency conflicts, performance bottlenecks, memory leaks, and runtime exceptions
Why work with me?
- Fast turnaround and clear communication
- Clean, maintainable fixesnot temporary workarounds
- Root-cause analysis with explanation of the solution
- Well-tested code and reliable results
Ill review the issue, estimate the scope, and recommend the best solution.
Lets get your application running smoothly again!
Get to know M Mubazar
M Mubazar
Senior Full Stack Developer
- FromPakistan
- Member sinceJun 2026
- Avg. response time1 hour
Languages
Urdu, English
Hi, I'm Muhammad Mubazar, a Full Stack Developer specializing in scalable web applications, SaaS solutions, and AI-powered systems.
I build fast, secure, and production-ready applications using Next.js, NestJS, React, Node.js, MongoDB, Redis, ElasticSearch, and AI integrations.
My services include:
• Full Stack Development
• SaaS Applications
• AI Integration
• REST APIs
• Dashboard Development
• Authentication
• Performance Optimization
I focus on clean architecture, responsive UI, scalable backend systems, and reliable communication to deliver high-quality results.
My Portfolio
FAQ
What information do you need to fix my bug?
Please share: (1) A description of the bug or error, (2) Screenshots or screen recordings of the issue, (3) Console/terminal error logs if available, (4) Access to your codebase (GitHub repo link or ZIP file), and (5) Steps to reproduce the bug. The more details you share, the faster I can diagnose.
Can you fix bugs in a project someone else built?
Absolutely! I regularly work on codebases built by other developers. I’ll review the code structure, understand the architecture, and fix the issue cleanly. Just share the repository and describe the problem.
How quickly can you fix my bug?
Most small bugs (1 bug, Basic package) are fixed within a few hours of starting work. Standard fixes (up to 3 bugs) typically take 1-2 days. Complex debugging may take 2-3 days. I’ll give you an honest, realistic timeline after reviewing your issue.
What if the same bug comes back after delivery?
I provide a free re-fix guarantee. If the exact same bug returns after my fix, I’ll resolve it again at no extra charge. My goal is permanent fixes, not temporary patches.
Do you work with TypeScript projects?
Yes! I work with both JavaScript and TypeScript. I can fix TypeScript-specific errors including type mismatches, configuration issues, strict mode problems, and generic type errors.
My app uses a framework not listed. Can you still help?
If your project is JavaScript/TypeScript-based (React, Vue, Angular, Node.js, Express, NestJS, Next.js, Nuxt), I can very likely help. Message me with your tech stack and the issue, and I’ll let you know within an hour.
