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Fiverr Pro
English
$
USD
I will fix react js and next js bugs, errors, and website issues
Tanvir
About this gig
React bugs, Next.js errors, API issues, or broken features slowing down your web application?
I will diagnose and fix React, Next.js, TypeScript, JavaScript, and FastAPI issues so your application works smoothly again.
I can help with:
- React and Next.js bug fixing
- JavaScript and TypeScript errors
- FastAPI backend and API issues
- API integration problems
- Authentication and authorization bugs
- Responsive UI and frontend issues
- Database, CRUD, and form errors
- Routing and hydration problems
- Build and deployment errors
- Performance improvements
- Small feature additions
I work with React, Next.js, TypeScript, JavaScript, Node.js, Python, FastAPI, PostgreSQL, and MongoDB.
Why choose me?
- Clean, maintainable code
- Root-cause debugging
- Clear communication
- Regular progress updates
- Testing before delivery
- Support for my completed work
Please message me before ordering with your issue details, screenshots, error messages, tech stack, and project access. Once I check the details, Ill point you to the most suitable package.
Note: Pricing depends on issue complexity. Large features or complex projects require a custom offer.
Get to know Tanvir
Tanvir
Full Stack Developer for SaaS and Web Applications
- FromBangladesh
- Member sinceMay 2025
- Avg. response time1 hour
Languages
Bengali, English
Hi, I’m Tanvir, a full-stack developer with 2 years of professional experience building SaaS applications, admin dashboards, business systems, and custom web platforms.
I work with Next.js, React, TypeScript, FastAPI, Node.js, PostgreSQL, and MongoDB. My recent work includes a Mini ERP, a hosting and domain management platform, secure authentication, role-based access, REST APIs, and real-time dashboards.
I focus on clean, maintainable code, clear communication, and reliable delivery. Send me your project requirements, and I’ll suggest the right technical approach.
FAQ
Do you need access to my source code?
Yes. I may need access to your project files, private repository, development environment, or temporary credentials to investigate and fix the issue.
What counts as one bug?
One bug is one specific issue with a clear expected result. Multiple unrelated errors or complex system-wide problems may require a higher package or custom offer.
Can you add new features?
Yes. I can add small features through the Premium package. Medium or large features require a custom offer based on the scope.
Do you fix both frontend and backend issues?
Yes. I can fix React and Nextjs frontend issues, FastAPI or Node.js backend errors, APIs, authentication, and database problems.
Can you fix deployment errors?
Yes. I can troubleshoot build and deployment issues on platforms such as Vercel, VPS, Docker, or similar hosting environments. Please contact me first.
Should I place an order directly?
Please message me before ordering so I can review the issue, confirm the scope, and recommend the correct package.
