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English
$
USD
I will fix react js, next js bugs and mongodb or API errors in your web app
Sumera Yaseen
About this gig
Is your React or Next.js app crashing, stuck on a blank screen, or failing to build? Maybe data from your API or MongoDB never shows up. I track down the root cause and deliver stable fixes you can trust.
What I can fix:
- React component, hooks, state, rendering bugs
- Next.js build failures, routing, SSR, hydration errors
- Failed fetch / Axios requests, CORS problems, wrong responses
- MongoDB connection errors, Mongoose schemas, broken queries
- Node.js / Express API endpoints returning 500s
- Deployment issues on Vercel, Netlify, VPS servers
Why work with me:
- Web-only focus: React, Next.js, Node, MongoDB
- Root-cause debugging instead of quick patches
- Plain-English notes on every change
- Your repo, keys, database stay private
How it works:
1. Send the repo (GitHub link, zip) with steps to reproduce each bug
2. I confirm scope plus price before starting
3. Fixes get tested locally, then pushed to a separate branch for review
4. You approve; revisions are included
Not sure which package suits your project? Message me first for one free quick look at the error.
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 Sumera Yaseen
Sumera Yaseen
Front End Developer, React, NextJS and Website Bug Fix Expert
- FromPakistan
- Member sinceSep 2024
- Avg. response time1 hour
Languages
English, Arabic, German, Dutch
Hi! I’m a front-end developer who fixes and builds fast, responsive websites. I solve HTML, CSS and JavaScript bugs, mobile responsive issues, React and Next.js errors, and MongoDB or API problems. I also convert Figma designs into pixel-perfect React or Next.js landing pages with Tailwind CSS, set up contact forms, connect APIs, and improve page speed and Core Web Vitals. You get clean, tested code, clear updates and fast replies. Message me before ordering and I will check your issue for free.
My Portfolio
Other Website Maintenance Services I Offer
FAQ
Do you fix React Native or mobile apps?
No. This gig covers web apps only: React, Next.js (Pages or App Router), Node.js/Express and MongoDB.
What access do you need?
A GitHub/GitLab repo invite or a zip of the project, plus a .env example. Share real keys only if needed, and a test database is better than production.
Will you push to my main branch?
No. I push fixes to a separate branch or send a pull request, so you can review and merge when you're happy.
What if the bug can't be reproduced or fixed?
I try to reproduce it before you order. If an issue can't be solved once the order starts, I tell you right away and offer a refund for that part.
