Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix backend bugs and optimize node js nestjs apis
Micheal
5.0
5.0
About this gig
Are you stuck with a crashing backend or slow API? Ill quickly identify and fix bugs in your Node.js or NestJS backend and optimize your APIs for speed and reliability.
What I offer:
- Fix backend bugs and crashes in Node.js or NestJS.
- Optimize API response time and database queries.
- Clean up messy code and add clear documentation.
- Review your backend module and suggest improvements for scalability.
Why choose me?
- Backendfocused: I write clean, maintainable code using best practices.
- Fast: I prioritize fast investigation and clear communication.
- Transparent: Every fix includes comments and documentation so you understand what changed.
Please message me before ordering so we can agree on scope and make sure your code will be safe and stable.
Get to know Micheal
Micheal
Backend Developer APIs Databases Security Deployment
- FromNigeria
- Member sinceSep 2024
- Avg. response time1 hour
- Last delivery1 week
Languages
English
Hi, I'm Micheal. I am a Backend Engineer specializing in building secure, high-performance distributed systems and payment infrastructures. With over 3 years of experience, I help businesses design fault-tolerant APIs, integrate complex payment gateways (like Paystack and Stripe), and ensure 99.9% uptime for critical applications.Whether you need a robust NestJS backend from scratch, a secure webhook verification pipeline, or database optimization, I deliver clean, scalable, and production-ready code. Let's build a backend that scales with your business. Message me to discuss your project!
Other Software Development Services I Offer
FAQ
Can you really fix any Node.js or NestJS bug?
I focus on API bugs, crashes, auth issues, and performance problems. Very legacy or low‑level system code may need extra analysis. Message me your case first.
Do you need my codebase?
Yes. I need access to your code (GitHub, zip, or repo) to reproduce and fix the bug or optimize the API.
What if I need new features, not just fixes?
This gig is mainly for bug fixes and optimization. I can add small features depending on scope; for bigger features, we can discuss a custom offer.
How fast can you deliver?
Basic bug fixes in 1–2 days. Optimization and full‑module review may take 3–6 days depending on complexity.
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
Q 
quatumsparktech
Pakistan
He did an Absolutely exceptional work. They didn't just write code; they optimized the entire logic of our backend. The integration was seamless, the documentation was clear, and they handled complex edge cases I hadn't even considered. Professional, communicative, and highly skilled. Will definitely be a long-term partner for our scaling needs!
Up to $50
Price
3 days
Duration
E 
Seller's Response
Helpful?A 
adrelinapaul
Germany
Great experience working with this seller. Delivered the Node.js backend on time, followed all requirements, and maintained clear communication throughout. Will definitely order again.
Up to $50
Price
2 days
Duration
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
Q quatumsparktech
Pakistan
He did an Absolutely exceptional work. They didn't just write code; they optimized the entire logic of our backend. The integration was seamless, the documentation was clear, and they handled complex edge cases I hadn't even considered. Professional, communicative, and highly skilled. Will definitely be a long-term partner for our scaling needs!
Up to $50
Price
3 days
Duration
E Seller's Response
Helpful?A adrelinapaul
Germany
Great experience working with this seller. Delivered the Node.js backend on time, followed all requirements, and maintained clear communication throughout. Will definitely order again.
Up to $50
Price
2 days
Duration
Helpful?
