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Fiverr Pro
English
$
USD
I will fix your ai app and be your vibe coding consultant
Zlatko M
5.0
5.0
About this gig
Built an app with Claude Code, Cursor, Lovable, Replit, or Base44 and now something is broken?
I troubleshoot and fix AI-built web apps, SaaS products, MVPs, dashboards, and vibe-coded projects so they work properly in production.
I can help with:
- Vibe coding bugs and broken features
- Supabase database and authentication issues
- Login, users, roles, and permissions
- Stripe checkout, subscriptions, and webhooks
- OpenAI, Claude, and Gemini integrations
- Next.js and React problems
- Broken APIs and backend logic
- Vercel deployment failures
- Performance and responsive issues
- Features needed before launch
Send me your repo, live URL, or broken preview and explain what is happening. Ill trace the actual issue instead of rebuilding everything from scratch.
I work directly inside existing AI-assisted codebases and can repair, clean up, or extend the parts that are holding the product back.
If the problem is larger than a quick fix, Ill explain the scope clearly and recommend the right package before we start.
Get to know Zlatko M
Zlatko M
Web Designer and Developer from Europe, Over 80 Projects Delivered
- FromCroatia
- Member sinceDec 2021
- Avg. response time1 hour
- Last delivery1 month
Languages
English, Croatian, Bosnian, Serbian
Hello, I'm Zlatko a Web Designer & Developer helping businesses build modern websites, ecommerce stores, and ai applications. My focus is simple: clean design, solid development, fast performance, and prompt communication from start to finish. Detail-obsessed, reliable, and easy to work with with every project built to be practical, scalable, and ready to launch. From first idea to final launch, I stay involved and make sure the details are right.
Among my clients
EGC
Vault Apps
Mavesta Media
My Portfolio
FAQ
What kind of projects can you help with?
I can help with AI web apps, SaaS products, MVPs, dashboards, internal tools, and vibe-coded projects built with modern development tools.
Can you fix bugs in Claude Code or Cursor projects?
Yes. I can troubleshoot and fix issues in projects built or maintained with Claude Code, Cursor, and similar AI-assisted development workflows.
Can you work on an existing codebase?
Yes. I can review your existing project, identify the issue, fix bugs, improve the structure, and add new functionality where needed.
Can you help with Supabase and database issues?
Yes. I can help with Supabase setup, database logic, authentication, permissions, queries, and common integration problems.
Can you fix Stripe payment or subscription issues?
Yes. I can troubleshoot Stripe checkout, subscriptions, webhooks, customer flows, payment logic, and related integration issues.
Can you integrate OpenAI, Claude or Gemini?
Yes. I can integrate and troubleshoot OpenAI, Claude, Gemini, and other AI APIs depending on your project requirements.
Can you help with Vercel deployment problems?
Yes. I can help diagnose build errors, environment variable issues, deployment failures, routing problems, and other Vercel-related issues.
Can you improve the UI/UX of my existing app?
Yes. I can improve layouts, responsiveness, usability, visual consistency, and overall user experience without rebuilding everything from scratch.
What if you cannot fix the issue within the package time?
I will explain what is causing the problem, what work is still required, and provide a clear estimate or custom offer for the remaining work.
Do you offer ongoing development support?
Yes. I can provide ongoing support for bug fixes, improvements, new features, integrations, maintenance, and technical consulting.
Reviews
2 reviews for this Gig
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Rating Breakdown
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- Quality of delivery
- Value of delivery
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J johnatanmichael
United States
Ongoing collaborationZlatko quickly understood the issues with my website and gave me clear, practical solutions I could actually implement. He has a strong understanding of web development, AI tools, SEO, and modern website strategy, and explained everything in a way that was easy to follow. I left the consultation knowing...
$50-$100
Price
1 day
Duration
Z 
Seller's Response
Helpful?S 
safa_kop
United States
Ongoing collaborationZlatko is an incredible freelancer. We kicked off the order and he had real fixes live on Cloudflare the same day, not a week of back-and-forth. He repaired our quote form on mobile, cleaned up the path into the calculator, tightened nav and CTAs so the site finally feels like one product, polished...
$50-$100
Price
1 day
Duration
Z Seller's Response
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J johnatanmichael
United States
Ongoing collaborationZlatko quickly understood the issues with my website and gave me clear, practical solutions I could actually implement. He has a strong understanding of web development, AI tools, SEO, and modern website strategy, and explained everything in a way that was easy to follow. I left the consultation knowing...
$50-$100
Price
1 day
Duration
Z Seller's Response
Helpful?S safa_kop
United States
Ongoing collaborationZlatko is an incredible freelancer. We kicked off the order and he had real fixes live on Cloudflare the same day, not a week of back-and-forth. He repaired our quote form on mobile, cleaned up the path into the calculator, tightened nav and CTAs so the site finally feels like one product, polished...
$50-$100
Price
1 day
Duration
Z Seller's Response
Helpful?
