I will fix bugs and errors in your react or nextjs app

N
noah_doan
N
noah_doan
Doan Cong Dat
fix bugs and errors in your react or nextjs app
Full Screen
fix bugs and errors in your react or nextjs app
Full Screen
Full Screen
fix bugs and errors in your react or nextjs appfix bugs and errors in your react or nextjs appfix bugs and errors in your react or nextjs app

About this gig

Is your React or Nextjs app throwing errors, breaking on mobile, or behaving strangely? I'll find the cause and fix it properly, not just hide the symptom.


I can fix:

Runtime errors, blank screens and failed builds

Login and session problems (JWT, protected pages, token refresh)

API calls that fail, load forever or show stale data

Forms and validation (React Hook Form, Zod, Yup)

Layouts that break on mobile or in certain browsers

Slow pages and unnecessary re-renders


What you get:

A clear explanation of what caused the bug and how I fixed it

Clean, typed code that matches your project's style

A test of the fix before delivery


Tech I work with: React, Nextjs (App Router and Pages), TypeScript, Tailwind CSS, Redux, Zustand, TanStack Query, Node and Express.


Please message me before ordering with a short description of the problem. I'll confirm I can fix it and recommend the right package.

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Get to know Doan Cong Dat

Doan Cong Dat

FrontEnd Developer

  • FromVietnam
  • Member sinceOct 2026
  • Avg. response time1 hour

  • Languages

    English, Vietnamese
I build NextJS and React web apps that work end to end: sign-in, search, dashboards and payments. My latest project is a live course platform with three user roles, PayPal and bank-transfer payments, an admin review flow and 83 automated tests. I can help you: • Fix bugs in React / NextJS apps • Turn Figma designs into responsive pages • Add login, dashboards and API integrations • Make your site fast and mobile-friendly Clean TypeScript code, clear updates and a preview link before delivery. Message me before ordering so we agree on the scope.

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