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Fiverr Pro
English
$
USD
I will fix bugs or add firebase supabase auth to your react or svelte app
Mumtaz W
About this gig
Is your React or Svelte app throwing errors, breaking in production, or stuck because a feature just won't work right? Most "bug fix" freelancers on Fiverr work in WordPress or Shopify I specialize specifically in JavaScript framework bugs: React, Svelte, and SvelteKit, plus the Firebase and Supabase integrations that commonly break auth and data flows.
I read the actual code, find the real cause, and fix it properly not a patch that breaks again next week.
What I Fix:
- JavaScript/TypeScript errors and broken functionality
- Firebase or Supabase authentication issues (login loops, permission errors, broken signup flows)
- API integration failures and data-fetching bugs
- Layout, responsiveness, and cross-browser issues
- Messy or unstable code that needs cleanup
What You Get:
- A clear explanation of what caused the bug, in plain English
- Clean, tested code, not just a quick hack
- Fast turnaround (see delivery times above)
- Post-delivery support window if the issue resurfaces
Send me your repo link and a description (or screen recording) of the issue, and I'll confirm I can fix it before you order no wasted spend.
Get to know Mumtaz W
Mumtaz W
Responsive Website Developer, React Expert, Landing Page Specialist
- FromPakistan
- Member sinceAug 2024
Languages
Urdu, Hindi, English
Frontend developer with 1+ year shipping production websites for hospitality, e-commerce & business clients.
At Arbob Tech, I've built 50+ websites using React, Next.js, SvelteKit & Tailwind CSS — driving 35% more client orders and 45% higher mobile sales.
I turn Figma designs into pixel-perfect, fast websites & build React/Next.js apps from scratch. Hand-coded only — no templates.
Stack: React · Next.js · Svelte · Tailwind · JS · TS · Firebase · Supabase
Drop me a message — I'll reply with a clear plan within hours.
My Portfolio
FAQ
What information do you need to start?
A repo link (or code export) and a clear description of the bug — a screen recording of the issue happening makes diagnosis much faster.
Do you fix bugs in Firebase or Supabase specifically?
Yes — authentication, database rules, and API connection issues in Firebase and Supabase are a core part of this gig, not an add-on.
Can you add a login/signup system to my existing app?
Yes — Standard and Premium both cover adding a full authentication flow with Firebase or Supabase if you don't have one yet.
Does this include payment gateway integration?
No — this gig covers bug fixes, authentication, and API/data integration. If you need payment processing added, message me first so we can scope that separately and honestly.
Do you offer rush/emergency delivery?
Yes, for an added fee — message me with your timeline and I'll confirm if same-day turnaround is possible for your specific issue.
What if the bug isn't fully fixed after delivery?
Every package includes a post-delivery support window — if the same issue reappears in that window, I fix it at no extra cost.
I need a whole new feature built, not just a bug fixed — is that this gig?
For new features or a full site build, check my website development gigs instead — this one is scoped specifically for fixing and integrating, not building from scratch.
