Browse categories
Explore
Fiverr Pro
English
$
USD
I will build, fix and optimize your react js and next js web app
Usama
5.0
5.0
About this gig
Is your React or Next.js app slow, buggy, or not production-ready? Maybe you built it using AI tools like Lovable, Replit, Bolt, v0, or Cursor, and now need a developer to fix bugs, clean up the code, and make it production-ready. Or you need a React/Next.js app built from scratch, a Figma design converted to code, or an existing project improved. Either way, I can help.
Frontend developer with 3+ years building, fixing, and optimizing React.js and Next.js apps clean code, responsive UI, strong performance, scalable architecture.
WHAT I CAN HELP WITH
- Build React/Next.js apps from scratch
- Fix bugs, errors, broken functionality
- Stabilize AI-generated code (Lovable, Replit, Bolt, v0, Cursor)
- Convert Figma/PSD designs into pixel-perfect code
- Improve speed, Core Web Vitals, performance
- Fix responsiveness issues across devices
- Integrate REST APIs, auth, third-party services
- Refactor messy code into maintainable structure
- Connect frontend with Node.js, .NET, Firebase, Supabase
Send your project details or repo I'll tell you exactly what it needs.
Get to know Usama
Usama
Full Stack Web and App Developer
- FromPakistan
- Member sinceJun 2022
- Last delivery11 months
Languages
Urdu, English, Sindhi, German
I'm a Full Stack Web Developer specializing in React.js, Next.js, and
TypeScript, with backend experience in Node.js and modern API integration.
I've completed 25+ projects on Fiverr, helping businesses launch web
applications that load fast, rank well on Google, and convert visitors
into customers.
What I bring to every project:
- Clean, maintainable code built for performance and scale
- SEO-friendly, mobile-first design
- Clear communication and on-time delivery
- Post-launch support so your product keeps running smoothly
Let's build something that works as well as it looks.
My Portfolio
FAQ
Can you fix an app I built using AI tools like Lovable, Bolt, or v0?
Yes! I regularly clean up and stabilize AI-generated code, fix bugs, and make it production-ready.
Do you only work with AI-generated projects?
No, I build traditional React/Next.js projects from scratch too, including Figma-to-code conversions.
What do you need from me to get started?
Your project repo/files or Figma link, and a brief description of what needs to be fixed or built.
Do you work with backend integrations?
Yes, I can connect your frontend with Node.js, .NET, Firebase, or Supabase.
How do you price your work?
Message me with your project scope for an accurate quote pricing depends on complexity.
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M michaldohnalek
Czech Republic
Ongoing collaborationUsama was very patient, even with my limited availability. He delivered exactly what was required and always met the deadlines. The final result was bug-free and exceeded my expectations. He went above and beyond to ensure everything worked perfectly. I highly recommend working with him!
$100-$200
Price
3 weeks
Duration
U 
Seller's Response
Helpful?
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M michaldohnalek
Czech Republic
Ongoing collaborationUsama was very patient, even with my limited availability. He delivered exactly what was required and always met the deadlines. The final result was bug-free and exceeded my expectations. He went above and beyond to ensure everything worked perfectly. I highly recommend working with him!
$100-$200
Price
3 weeks
Duration
U Seller's Response
Helpful?
