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Fiverr Pro
English
$
USD
I will fix lovable ai base44 app bugs supabase auth stripe api integrate and deployment
Mercier A
About this gig
Your AI-built app looks great, but does it actually work?
If Lovable or Base44 keeps showing errors, failed payments or broken logins, I'll help find the problem and get your project back on track.
WHAT I OFFER:
- Lovable AI bug fixing and debugging
- Base44 app repair and customization
- Supabase auth, login and signup fixes
- Database, RLS and permission errors
- Stripe checkout and webhook fixes
- API integration and connection errors
- OAuth, redirects and session problems
- Broken forms, buttons and UI issues
- React, Next.js and JavaScript errors
- Blank screens and failed builds
- Vercel, Netlify and domain deployment
- Environment variables and GitHub sync
- SaaS MVP testing and app improvements
I troubleshoot the agreed issues, test fixes and explain what changed. Each package has a clear scope.
MESSAGE ME before ordering with your app link and error details. I'll help you choose the right fix.
Lovable ai, fix lovable, lovable dev, lovable app, base44, base44 bug fix, vibe coding, supabase, supabase auth, stripe integration, api integration, oauth, app debugging, bug fixing, web app repair, ai app development, saas mvp, react, nextjs, deployment, vercel, netlify
Get to know Mercier A
Mercier A
AI APP DEVELOPER, LOVABLE, BASE44 AND WEB SOLUTIONS
- FromFrance
- Member sinceOct 2026
- Avg. response time1 hour
Languages
English, French, Spanish
Hi, I an Mercier, I specialize in AI website development, vibe coding and building functional web apps using Lovable AI, Base44, Replit, Bolt, Claude Code, and Supabase. I help businesses and startups develop SaaS MVPs, fix bugs, integrate APIs, connect databases and deploy responsive websites and applications.
From AI-generated app improvements to full-stack development, WordPress, Wix and Shopify solutions, I deliver clean designs, reliable functionality and scalable digital solutions.
My Portfolio
FAQ
Can you fix my Lovable AI or Base44 app without rebuilding it?
Yes. I can inspect your existing Lovable AI or Base44 project, identify the issue, and repair the affected features while preserving the working parts of your app.
Can you fix Supabase login, signup, and authentication errors?
Yes. I troubleshoot Supabase authentication, OAuth login, signup errors, session problems, redirects, database permissions, and RLS policies.
Can you fix Stripe payment and checkout integration issues?
Yes. I can troubleshoot Stripe checkout, payment errors, webhook connections, subscription flows, and API configuration in your existing web app.
Can you fix broken API integrations in my AI-built application?
Yes. I work on API connection errors, failed requests, webhooks, environment variables, and third-party integrations in Lovable, Base44, and supported web apps.
Can you fix multiple bugs in one order?
Yes. My Basic package covers one issue, Standard covers up to three, and Premium covers up to five agreed fixes. Please contact me first for complex problems.
Can you fix React, Next.js, and JavaScript errors?
Yes. I can investigate broken components, failed builds, frontend errors, unresponsive buttons, forms, and related React or Next.js application issues.
Can you deploy my Lovable or Base44 application?
Yes. I can help with supported application deployment, environment setup, domain configuration, and hosting on platforms such as Vercel, Netlify, or other suitable services
Can you complete an unfinished SaaS MVP or AI web app?
Yes. I can review unfinished projects, repair existing functionality, and help complete specific features. Larger development work may require a custom offer.
Will my existing data and application features remain safe?
I aim to preserve existing features and data. Before making significant changes, I recommend creating a backup and testing updates in a safe environment whenever possible.
What access do you need to fix my application?
I may need project access, error screenshots, relevant logs, and limited access to connected services. Please use secure invitations and never send passwords or private API keys through chat.
