I will fix your nextjs app and make it production ready


About this gig
You already have an app. Maybe it was built in Lovable, Bolt, v0, Cursor, or a Next.js repo someone started and left messy.
It looks fine in a demo. It is not ready for real users.
Auth is loose. Stripe is half-wired.
Database rules are missing. Env vars are exposed.
One bad deploy can break billing, access, or logins.
I take over the existing codebase and make it shippable.
What I do:
- audit the repo before rewriting anything
- fix auth, sessions, roles, and access control
- repair Supabase / Postgres and RLS
- finish Stripe checkout, webhooks, subscriptions, and retries
- clean up Vercel deployment
- close obvious security and data holes
- leave you with a codebase you can keep shipping
This gig is for an app that already exists.
Need a new SaaS from scratch? Use my MVP gig.
Need hands-on Cursor / AI coding help? Use my consulting gig.
Stack:
Next.js,
React,
TypeScript,
Supabase,
Postgres,
Stripe,
Firebase,
Vercel.
7+ years.
120+ projects.
Send me the repo or live URL. Ill tell you what Id fix firstand what I wouldnt touch.
Gig workflow
These are the steps we’ll follow to complete your project.
- Basic Package.
- Video meetup
We'll meet (Zoom) to discuss your project.
- Website Design
I'll create the design for your website.
Modifications · Final Design - Development
I'll develop the website and deliver a working product for your review.
- Content & Delivery
I'll complete the website for delivery.
- Delivery
I'll send you the final delivery for review and feedback.
These are the steps we’ll follow to complete your project.
Get to know Zlatko M
I build and fix your AI website, SaaS MVP, or agency client site
- FromCroatia
- Member sinceDec 2021
- Avg. response time1 hour
- Last delivery1 week
Languages
English, Croatian
EGC
Vault Apps
Mavesta Media
My Portfolio
Other Vibe Coding Services I Offer
FAQ
Is this a new app from scratch or a takeover?
Takeover. You already have a Next.js, Lovable, Bolt, v0, or Cursor repo. I read it, fix what is dangerous, and make it safe to run with real users. If you need a greenfield MVP, use the other gig.
What do you actually fix?
Auth, access control, Supabase/Postgres and RLS, Stripe checkout and webhooks, env/secrets, broken deploys on Vercel, and the obvious holes that get you burned after launch. I do not start by rewriting the whole UI.
Do you rebuild everything?
No. I read the architecture first. I fix the highest-risk parts. A full rewrite only happens if the current app cannot be saved. I will tell you that before I charge for it.
Can you finish Stripe, auth, and the database?
Yes. That is the point of this gig. Checkout, webhooks, subscription state, retries, login boundaries, and row-level security. If those are half-done, that is the work.
Which stacks do you take on?
Next.js, React, TypeScript, Supabase, Postgres, Stripe, Firebase, Vercel. AI-built apps from Lovable, Bolt, v0, or Cursor are fine if the repo is available. I do not take over a random PHP theme and pretend it is a SaaS.
Will you keep my current design?
Yes, unless the UI is what is broken. Production work is not a redesign gig. If the design itself is killing conversion, I will say so. I will not silently restyle your product to bill more hours.
Do you also handle SEO?
For a marketing site sitting next to the app, yes: metadata, indexation, basic technical SEO. This gig is still about making the product work. Ranking a blog is a different job.
Do you stay on after delivery?
Yes, if you want it. I would rather own the product for a while than disappear after one fix. Ongoing support is a separate arrangement. Say that up front if you need someone who does not vanish.
How fast can you deliver?
A focused production pass is usually 3 to 7 days once I have the repo. A messy Stripe + auth + RLS cleanup can take longer. I will give you a real range after I see the code, not a fake 24-hour promise.
What do you need from me to start?
Repo access, the live URL if it exists, and a short note on what is broken or what you are afraid will break. Stripe/Supabase access if those are already in use. I do not need a 12-page brief. I need the code.
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
H hintsteinermktg

Austria
Great experience working with Zlatko! He did a great job creating our press sites and delivered a professional, well-structured result that matched what we needed. Communication was smooth throughout the project. Highly recommended and we would happily work with him again!
$1,000-$2,500
Price
4 weeks
Duration
Z 
Seller's Response
Helpful?M 
marvinvaca2

United States
Amazing work!
$600-$800
Price
13 days
Duration
Z 
Seller's Response
Helpful?
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
H hintsteinermktg

Austria
Great experience working with Zlatko! He did a great job creating our press sites and delivered a professional, well-structured result that matched what we needed. Communication was smooth throughout the project. Highly recommended and we would happily work with him again!
$1,000-$2,500
Price
4 weeks
Duration
Z 
Seller's Response
Helpful?M 
marvinvaca2

United States
Amazing work!
$600-$800
Price
13 days
Duration
Z 
Seller's Response
Helpful?
