I will troubleshoot optimize and boost performance for your web app like a pro


Vetted Pro
Level 2
Vetted by Fiverr Pro
M Hussain was selected by the Fiverr Pro team for their expertise.
About this gig
Is your website crashing, slow, or behaving unpredictably?
Im a Full-Stack Pro Developer (React, Next.js, Node, TypeScript) specializing in critical bug fixing, performance optimization, memory leak cleanup, API failures, and UI/UX glitchesfast and clean.
I dont just patch issues
I diagnose the root cause, optimize the codebase, and deliver a stable, scalable solution.
What I fix
UI bugs, broken layouts, hydration issues, API/CORS errors, server crashes (4xx/5xx), slow loading, high TTFB, memory leaks, infinite loops, stale renders, state issues (Redux/Zustand/React Query), auth problems, DB performance issues (Mongo/Postgres/Prisma).
What I optimize
Performance (memoization, caching, bundling), Web Vitals (LCP/CLS/TTI), server speed (logging, rate-limits), React/Next.js (code splitting, images), database queries, deployments (Vercel/Netlify/Render), and security (XSS, validation).
Why choose me
Pro debugging workflow, documented fixes, root-cause report, performance insights, video walkthroughs, and fast delivery.
Tech
- React Next.js Node TypeScript MongoDB PostgreSQL Prisma Tailwind Supabase Firebase Vercel
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 M Hussain
Vetted Pro
Dedicated Software engineer at your service
Level 2
M Hussain is part of the Fiverr Pro catalog and has been hand-picked by a dedicated Fiverr Pro team for their skills and expertise.
Vetted for
Website Development
Website Maintenance
- FromPakistan
- Member sinceAug 2020
- Avg. response time1 hour
- Last delivery3 days
Languages
English, Spanish, French, Russian
My Portfolio
FAQ
Will you rewrite my project?
Only if needed (with your approval). Most fixes do NOT require rewriting the whole app.
Do you support all frameworks?
React, Next.js, Node.js, Express, MongoDB, Postgres, Prisma, Supabase, and general JS errors.
Can you fix urgent issues?
Yes — choose fast delivery or message me for a custom priority order.
Will you explain what went wrong?
Yes. I provide a proper root cause explanation and recommendations.
1 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
L 
littlebusiness_

United States
Working with MHussain was one of the best freelancer experiences I've had. I came to him with a complex technical project, integrating Clerk authentication and Supabase persistent memory into an existing React/Next.js app, deployed to a custom domain via Vercel, and he delivered faster than I thought...
$800-$1,000
Price
4 days
Duration
H 
Seller's Response
Helpful?
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
L 
littlebusiness_

United States
Working with MHussain was one of the best freelancer experiences I've had. I came to him with a complex technical project, integrating Clerk authentication and Supabase persistent memory into an existing React/Next.js app, deployed to a custom domain via Vercel, and he delivered faster than I thought...
$800-$1,000
Price
4 days
Duration
H 
Seller's Response
Helpful?

