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$
USD
I will fix mern stack bugs and react and node js errors
Hashir
About this gig
Is your MERN stack application crashing or throwing errors? I specialize in stabilizing production systems and resolving issues in React.js, Node.js, Express.js, and MongoDB. I dont just patch problems I find root causes and deliver permanent, maintainable fixes.
I can fix: frontend React bugs, Node.js API errors, MongoDB query issues, authentication problems (JWT, OAuth, admin panels), 500 server errors, CORS, async/await crashes, memory leaks, and dashboard/reporting issues.
Process: I analyze logs, replicate issues in a controlled environment, implement tested, production-ready fixes, provide explanations, and ensure backups.
Why choose me: fast, reliable delivery, clear communication, focus on long-term stability, experience debugging real-world MERN apps.
Message me with logs, screenshots, issue details, and access info before ordering. I will fix your app efficiently and safely.
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 Hashir
Hashir
Full Stack Web Developer
- FromPakistan
- Member sinceApr 2025
Languages
Urdu, English
Full-Stack MERN Developer building modern, scalable web applications from idea to deployment.
I specialize in MongoDB, Express.js, React.js, and Node.js, creating responsive frontends, secure APIs, and optimized databases. I build business websites, dashboards, custom web apps, and SaaS platforms with clean, maintainable code.
Fast communication, on-time delivery, and reliable long-term support.
Let’s turn your idea into a powerful, production-ready web solution.
FAQ
Can you fix issues on my live production server?
Yes. I work carefully with backups and test fixes in a controlled environment before applying them live, so your site stays safe.
How fast can you deliver a fix?
Small frontend/backend errors can be fixed in 24–48 hours. Larger production issues usually take 2–4 days depending on complexity.
What do you need from me before starting?
Access to your server/code, error logs or screenshots, and a description of the issues you’re facing.
Will the fix be permanent?
I focus on root cause analysis and proper error handling, so fixes are long-term, not temporary patches.
Do you handle performance, memory, or database issues?
Yes. I optimize MongoDB queries, backend performance, memory usage, and provide recommendations to prevent future crashes.
Do you provide documentation or explanation of changes?
Absolutely. I provide clear explanations of what was fixed, why it happened, and guidance for future prevention.
What if the issue recurs after the fix?
I offer support for a short period after delivery to ensure the fix works as intended and any unforeseen issues are resolved.
