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I will debug and fix your react or nextjs frontend bugs and errors, fix
Mustaqim K
About this gig
Hi, Is your React or Next.js website showing errors, behaving unexpectedly, or not working the way it should?
I will debug and fix your React or Next.js frontend bugs and help get your web application working smoothly again.
Whether it is a small UI issue or a more complex frontend problem, I will investigate the actual cause instead of simply patching the visible error.
I can help with:
- React & Next.js bugs and runtime errors
- JavaScript / TypeScript issues
- UI, responsive & component problems
- Redux / Redux Toolkit state issues
- RTK Query & API integration errors
- React Query & data-fetching problems
- Next.js App Router & routing issues
- Hydration, rendering & build errors
- Forms, validation & authentication issues
- Frontend performance problems
What you will get:
- Clean and focused bug fixing
- Root-cause investigation
- Maintainable code changes
- Responsive frontend fixes
- Testing of the affected functionality
- Clear communication throughout the work
I work with existing React, Next.js, JavaScript, TypeScript, Redux projects built by you or another developer
Have a error or bug? Send me the details before ordering, and I will review the issue and suggest the best fix.
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 Mustaqim K
Mustaqim K
Full Stack React NextJS NestJS NodeJS PostgreSQL MongoDB Developer
- FromBangladesh
- Member sinceAug 2026
- Avg. response time1 hour
Languages
Bengali, English, Hindi, Urdu
I help businesses build modern web applications using React, Next.js, Node.js, Express.js, NestJS, PostgreSQL, and MongoDB. My services include Full Stack Development, SaaS applications, e-commerce websites, custom web development, REST API development, API integration, admin dashboards, bug fixing, website optimization, performance improvements, and responsive UI development. I focus on clean, scalable, maintainable code, clear communication, and delivering reliable, high-quality solutions that support long-term business growth.
My Portfolio
FAQ
What React or Next.js bugs can you fix?
I can fix UI issues, runtime errors, routing problems, API integration, state management, responsive issues, build errors, hydration errors, and more.
Can you fix an existing React or Next.js project?
Yes. I can debug and fix existing React/Next.js projects, whether you built them yourself or inherited them from another developer.
Do you work with Redux and Redux Toolkit?
Yes. I can fix Redux, Redux Toolkit, RTK Query, state management, and data-fetching issues.
Can you fix API integration problems?
Yes. I can troubleshoot frontend API calls, data fetching, authentication, and API integration issues.
Can you fix multiple bugs?
Yes. Choose the package that matches the number and complexity of your bugs, or message me first for a custom offer.
What do you need before starting?
Please provide the error details, screenshots or video if available, relevant code/project access, and steps to reproduce the issue.
Should I contact you before placing an order?
Yes, especially for complex issues. Send me the details so I can review the problem and recommend the appropriate package.
