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English
$
USD
I will fix bugs and errors in your react nextjs and nodejs app
Umair
Level 2
5.0
5.0
About this gig
Is your React or Next.js app throwing errors, failing to build, or behaving in a way you can't explain?
I will find the actual cause and fix it, not patch over it.
What I fix:
- React and Next.js runtime errors and crashes
- Build and deployment failures (Vercel, Netlify, AWS)
- Hydration and server component errors
- State, hooks and re-render bugs
- API, CORS and authentication issues
- Node.js, NestJS and Express backend errors
- TypeScript and type errors
- Slow pages and performance problems
- Broken layouts and responsive issues
How it works:
Send me the repo or a screen recording. I reproduce the bug, fix it, and explain what was wrong and why, so it does not come back.
5+ years of professional full stack experience, 5.0 rating across 51 orders. Most single bug fixes are delivered within 24 hours.
Tech: React, Next.js, Node.js, NestJS, TypeScript, JavaScript, PostgreSQL, Prisma, Firebase, REST and GraphQL.
Not sure how big the problem is? Send me the error first and I will tell you which package you need.
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 Umair
Umair
Full Stack Software Engineer, AI and Business Automation
Level 2
- FromPakistan
- Member sinceJan 2020
- Avg. response time1 hour
- Last delivery3 weeks
Languages
Urdu, Hindi, English
I am a Full Stack Software Engineer with 5+ years of experience building web apps, mobile apps, AI solutions, and custom business software. I help startups and businesses turn ideas and manual workflows into scalable digital products. My expertise includes Next.js, React, Node.js, NestJS, Python, TypeScript, Flutter, React Native, PostgreSQL, Firebase, APIs, GraphQL, and AI integrations. I build SaaS, CRM, ERP, automation systems, AI apps, dashboards, and mobile applications tailored to your needs.
My Portfolio
FAQ
Can you fix a bug if I don't have the source code on GitHub?
Yes. You can send a ZIP of the project or add me as a collaborator on any Git host. I can also work directly on a staging environment if that's easier.
What do you need from me to start?
The repo or project files, steps to reproduce the bug, and the error message or a short screen recording. The more precisely I can reproduce it, the faster the fix.
What if the bug is bigger than one package?
I'll tell you before I start, not after. If it turns out to be larger than what you ordered, I'll explain what's involved and send a custom offer. You're never charged more without agreeing first.
Will you explain what was wrong?
Yes. Every delivery includes an explanation of the root cause and what I changed, so the same bug doesn't reappear.
Can you work on an existing production app?
Yes. I work on a branch and never push directly to production. You review and merge.
Do you fix backend and API bugs too?
Yes. Node.js, NestJS, Express, REST and GraphQL APIs, database queries, and authentication flows.
Reviews
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G 
get1web
Spain
Ongoing collaborationOur company has been developing for many years but since we started working with Umair we have not changed programmers because he offers us a great quality of work and great support. He is very friendly and professional. We will continue working on future projects.
$100-$200
Price
2 days
Duration
Helpful?P 
peacelightr
Japan
Umair was very responsive and helped us build a custom function for a our app. A great experience.
$50
Price
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
G get1web
Spain
Ongoing collaborationOur company has been developing for many years but since we started working with Umair we have not changed programmers because he offers us a great quality of work and great support. He is very friendly and professional. We will continue working on future projects.
$100-$200
Price
2 days
Duration
Helpful?P peacelightr
Japan
Umair was very responsive and helped us build a custom function for a our app. A great experience.
$50
Price
Helpful?
