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Fiverr Pro
English
$
USD
I will fix node js nestjs backend debug, optimize, repair
Shihab
About this gig
Your backend is crashing. APIs are timing out. Users are complaining. I fix it fast.
You don't need a "developer." You need someone who can dive into broken code, find the root cause in hours, and ship a fix before your investors panic.
Problems I solve immediately:
- API returning 500 errors or random failures
- Slow endpoints taking 5+ seconds to respond
- Database queries timing out or locking tables
- Memory leaks crashing your server every few hours
- Authentication broken (login failing, JWT issues)
- Async/await hell code that works sometimes
- Production bugs your team can't reproduce
Why me (5+ years, 50+ backend rescues):
- I don't write new features. I fix what's broken fast.
- Average bug fix: 24 hours. Average API optimization: 10x faster.
- You get a root cause explanation, not just a patch.
- I work while you sleep (urgent orders prioritized).
- No fix = no payment. Simple.
Tech I debug daily:
Node.js | NestJS | Express | TypeScript | MongoDB | PostgreSQL | Redis | TypeORM | Mongoose | JWT | Docker
Before you order:
️ Contact me first Send your error logs, slow endpoint details, or crash description. I'll confirm I can fix it and give you a delivery time.
Stop losing users. Let's fix your b
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Get to know Shihab
Shihab
- FromBangladesh
- Member sinceAug 2025
- Avg. response time1 hour
Languages
Bengali, English, Spanish, Italian
I am Sahab Uddin, a full-stack developer skilled in Laravel, Node js, React, PHP, MySQL, MongoDB, Tailwind CSS, and Prisma ORM. I create clean, responsive, and scalable websites and apps tailored to your needs.
I focus on maintainable, secure code and great user experience. Let’s build your next project with quality and speed!
FAQ
How fast can you fix my broken API?
Most critical bugs are fixed within 24 hours (Basic package). For complex issues, 48 hours (Standard). If I can't fix it, you don't pay.
Do you need full repository access?
Yes — read access to your codebase. For sensitive projects, we can sign an NDA first. I never share or store your code.
Can you optimize my slow Node.js API without breaking it?
Yes. I identify bottlenecks (database queries, loops, blocking code) and optimize incrementally. I test each change. No breaking changes without your approval.
What if you can't find the bug?
You pay nothing. But in 50+ backend rescues, I've always found the root cause. Memory leaks, race conditions, hidden exceptions — I've seen them all.
Will you fix bugs in my existing NestJS microservices?
Absolutely. I debug NestJS modules, microservice communication (TCP/RMQ), and distributed transaction issues. Premium package covers multi-service debugging.
