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Fiverr Pro
English
$
USD
I will fix bugs and errors in your node js, nestjs or next js application
Muhammad Anas
About this gig
Something broke and you need it working today.
I debug and fix issues in Node.js, NestJS, Express, Next.js and React applications written in JavaScript or TypeScript. API errors, database and query problems, authentication and session bugs, broken deployments, failing builds, CORS issues, race conditions, and features that worked in development but not in production.
HOW I WORK
I reproduce the bug first. Guessing at a fix without reproducing it is how one bug becomes three. Then I find the actual cause rather than the symptom, fix it, and tell you in plain language what was wrong and why it happened.
If the root cause turns out to be bigger than a bug fix, I will tell you before doing any work rather than after.
WHAT I WORK WITH
TypeScript, JavaScript, Node.js, NestJS, Express, Next.js, React, PostgreSQL, MySQL, Prisma, TypeORM, Redis, Docker, Stripe, REST APIs, JWT and session authentication.
BEFORE YOU ORDER
Message me first with the error and what you were doing when it happened. I will tell you honestly whether it fits in this gig or needs a custom offer. I would rather turn work down than take an order I cannot finish well.
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Get to know Muhammad Anas
Muhammad Anas
Backend Developer, Stripe and AI Integration Specialist
- FromPakistan
- Member sinceSep 2026
- Avg. response time1 hour
Languages
Urdu, English
I build the parts of web applications where mistakes are expensive: subscription billing, APIs that hold up under load, real-time features, and AI capabilities added to products that already work.
2 years building production SaaS in TypeScript — Next.js, NestJS, PostgreSQL, Redis, Stripe. I've shipped multi-tenant platforms with role-based permissions, idempotent payment webhooks, and concurrency-safe transactions.
I ask questions before writing code, and I tell you when an approach won't work instead of building it and letting you find out later.
FAQ
What if you cannot fix it?
Then you get a full refund. I will still tell you what I found, because a clear diagnosis is worth something even when the fix sits outside this gig.
Do you need access to my code?
Yes, a repository invite or a zip file. I can work on a branch and send a pull request rather than touching your main branch.
Can you fix bugs in a codebase you did not write?
That is most of what I do. Reading unfamiliar code and finding how it actually behaves rather than how it is documented is normal work.
What if my bug is bigger than it looks?
I will tell you before starting and send a custom offer with a real scope. I will not quietly absorb three days of work into a two day order and deliver something rushed.
Will you explain what was wrong?
Always, in plain language. If you have a developer, they get a technical explanation too.
