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Fiverr Pro
English
$
USD
I will fix bugs and errors in your react, next js or node js app
Ismael M
About this gig
Your app is broken and you need it fixed - without a week of back and forth.
I'm a full-stack developer (TypeScript, React/Next.js, Node/NestJS) at a data analytics company. I debug production code every day and I bring that discipline here: reproduce first, find the root cause, fix it, and prove it's fixed.
How it works:
- You send repo access (GitHub/GitLab), the error and how to reproduce it
- I confirm the diagnosis and scope before starting
- You get the fix as a pull request with a clear explanation of what was wrong
- Standard and Premium include a regression test so the bug stays dead
What I fix:
- React/Next.js: rendering bugs, hydration errors, state issues, broken builds
- Node/Express/NestJS: API errors, crashes, async bugs, dependency conflicts
- Performance: slow pages, memory leaks, N+1 queries (Premium)
Not included: new features, full rewrites, WordPress/PHP themes, code without reproduction steps (I can quote those separately).
Not sure which package fits? Message me with the error and I will tell you honestly.
Get to know Ismael M
Ismael M
Full Stack Developer
- FromSpain
- Member sinceJul 2026
- Avg. response time5 hours
Languages
English, Spanish, Catalan
I am a Full Stack Developer specializing in building end-to-end SaaS products with React, NestJS, and TypeScript. I have experience leading migrations, designing API architectures, and optimizing complex systems to ensure high performance and reliability. My focus is on delivering robust solutions that meet business needs and scale effectively.
My Portfolio
FAQ
What do you need to start?
Repo access or a zip, your Node version, steps to reproduce, and what should happen instead. The requirements form covers it all.
My bug is intermittent and hard to reproduce. Can you still help?
Usually yes, but message me first. Intermittent bugs need profiling and logging, which is Premium scope.
Do you work on private repositories?
Yes. Invite me as a collaborator on GitHub/GitLab; I work on a branch and deliver a pull request you review. You can revoke access right after delivery.
What counts as one bug?
One incorrect behavior with a single root cause. If I find unrelated issues along the way, I flag them and quote them separately - no surprise scope.
Do you fix WordPress, PHP or Python apps?
No. This gig is JavaScript/TypeScript only: React, Next.js, Node, Express, NestJS. That focus is why it gets fixed fast.
Can you add a small feature while you are in the code?
This gig is fixes only, but message me - small improvements can be a custom offer.
