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Fiverr Pro
English
$
USD
I will fix bugs in your react nextjs or nodejs web application
Oleh Khrystenko
About this gig
Your app is down and every minute costs you users. You don't need a developer who "looks into it" for three days. You need the bug found, fixed, and explained before your users notice.
I debug and fix production issues in React, Next.js, Node.js, NestJS, and TypeScript applications. 6+ years shipping and maintaining commercial codebases. I run my own SaaS on this exact stack, so I solve these problems daily, not occasionally.
Stripe webhooks silently failing. Authentication breaking after deploy. API returning 500s under load. MongoDB queries timing out. State management bugs that only appear in production. Build and deployment pipelines that worked yesterday and don't today. If it's broken in your React or Node.js app, I've probably fixed the same thing in mine this month.
What you get with every fix:
Root cause analysis, not just a patch that hides the symptom. A tested PR with a clear explanation of what went wrong and why. Clean commit with documentation so you or any future developer can understand exactly what changed.
Send your bug. Error logs, screenshots, repo access. I scope every project for free and tell you exactly what it takes before you order.
Get to know Oleh Khrystenko
Oleh Khrystenko
Full Stack SaaS MVP Developer, Nextjs NestJS Stripe and AI integration
- FromUkraine
- Member sinceApr 2026
Languages
English, Ukrainian
Paying users in 4 weeks.
Not a prototype that collects dust. A product that collects money.
You describe the idea. I scope, price, and ship. Auth, payments, AI, dashboards, everything real users expect from a service they pay for.
Fixed price. Source code yours. Architecture your future team maintains without rewrites.
Live demo available.
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FAQ
What do you need to start?
Access to the repo (GitHub/GitLab), bug description, and steps to reproduce. Error logs or screenshots help speed things up.
What if the fix takes longer than expected?
I scope every bug before starting. If it turns out bigger than the package, I tell you upfront and we agree on next steps. No surprises.
Do you work with other stacks?
My core stack is React, Next.js, Node.js, NestJS, MongoDB, and Stripe. If your project uses something else, message me first and I'll let you know.
Do you provide a report with the fix details?
Yes. Every fix comes with a clean commit message and a written explanation of what caused the bug and how I fixed it. You'll know exactly what changed and why.
Can you work with my existing codebase?
Yes. I work with real production codebases daily. Just give me repo access and I'll navigate your architecture, no matter how complex.
Do you guarantee the fix won't break anything else?
I test every fix locally before pushing. The Standard and Premium packages include regression checks to make sure nothing else breaks.
How fast can you start?
Usually within a few hours of receiving repo access. I scope the bug first, confirm the approach, and get to work.
