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I will fix react javascript nodejs bugs errors and API issues
John
About this gig
Having bugs, errors, or API issues in your web application?
I will professionally debug and fix React, JavaScript, Node.js, and API issues in your existing web application.
WHAT I CAN FIX:
React.js bugs and component errors
JavaScript errors and functionality issues
Node.js and Express.js backend errors
REST API errors and integrations
MongoDB, MySQL, and Supabase connection issues
Frontend and backend integration problems
Form, authentication, routing, and data-fetching issues
Website performance and functionality issues
WHY CHOOSE ME?
Clean and maintainable code
Careful debugging and problem diagnosis
Clear communication
Professional and reliable service
Testing after fixing the issue
Please contact me before placing an order if your issue is complex. Send the error message, screenshots, and relevant project details so I can understand the problem and confirm the appropriate package.
Let's get your application working properly again!
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 John
John
- FromNigeria
- Member sinceJul 2025
Languages
English, Spanish
Hey! I’m John, a front-end developer and Framer designer. I build high-performance websites with a strong focus on visual appeal, usability, and real business impact.
I combine my skills in Framer, Figma, and front-end development to turn complex ideas into intuitive digital products. Clean design, smooth user experience, and fast delivery are my priorities.
Let’s build something your users will love!
FAQ
Can you fix React and JavaScript bugs?
Yes. I can diagnose and fix React.js, JavaScript, component, state, routing, and functionality issues in existing web applications.
Can you fix Node.js and API errors?
Yes. I can troubleshoot Node.js, Express.js, REST API, authentication, request, response, and frontend-to-backend integration issues.
Can you fix database connection issues?
Yes. I can troubleshoot MongoDB, MySQL, and Supabase connection, query, data-fetching, and integration issues.
What do you need before starting?
I need a clear description of the issue, the error message or screenshot, access to the relevant code or project files, and steps to reproduce the problem.
Can you fix a complex application?
Yes, depending on the issue and project scope. Please contact me before ordering so I can review the problem and recommend the appropriate package.
Can you fix both frontend and backend issues?
Yes. I can troubleshoot full-stack issues involving React, JavaScript, Node.js, APIs, and databases such as MongoDB, MySQL, and Supabase.
