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I will build supabase backend, rls security, auth, and API integration
Daniel John
About this gig
A sleek frontend application is useless when backend database bottlenecks, broken authentication flows, or insecure API integrations stall execution. AI-generated vibe code from Base44, Lovable, or Replit often leaves Postgres schemas unoptimized, exposing sensitive user data and degrading performance.
Backend Architecture & Database Issues Resolved:
- Supabase Security & RLS: Configure strict Row Level Security (RLS) policies, fix permission error 42501, and secure JWT auth tokens.
- Database Architecture & Postgres: Design scalable relational schemas, optimize complex SQL queries, and execute seamless database migrations.
- Authentication & User Management: Implement multi-provider OAuth, email magic links, session management, and custom user role permissions.
- API Integration & Edge Functions: Connect third-party REST APIs, debug payload drops, and deploy custom Supabase Edge Functions.
Stop compromising product security and application speed. Send current backend requirements, database schemas, or API docs now to get an instant scope review and launch today.
Get to know Daniel John
Daniel John
Vibe Coding Pro
- FromUnited Kingdom
- Member sinceApr 2026
Languages
English
I specialize in vibe coding to build scalable AI web application solutions using supabase and powerful n8n automation workflows. From launching an AI MVP to automating complex systems, I help startups and businesses build, deploy, and scale faster with modern AI driven development.
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FAQ
How to fix Supabase RLS error 42501 permission denied in production?
Fixing Supabase RLS error 42501 requires defining explicit SELECT, INSERT, or UPDATE policies matching exact user JWT authentication roles inside PostgreSQL policies.
How to integrate a custom REST API with Supabase Edge Functions?
Integrating a custom REST API with Supabase Edge Functions involves deploying Deno-based serverless scripts that process webhooks and handle secret environment variables safely.
Can Supabase authentication be configured for multi-tenant SaaS apps?
Yes. Supabase authentication is configured for multi-tenant SaaS apps by linking custom organization IDs to user metadata and applying tenant-isolated Row Level Security rules.
How to resolve broken Base44 app integration with Supabase databases?
Resolving a Base44 app integration failure requires verifying API key scopes, mapping asynchronous database promises, and configuring CORS headers to permit cross-origin requests.
Why is the Supabase backend query response time running slow?
Slow Supabase backend queries stem from unindexed foreign key columns or complex unoptimized joins. Adding target Postgres indexes and refining query execution plans restores speed.
How to migrate from Firebase to a Supabase PostgreSQL database?
Migrating from Firebase to Supabase requires converting NoSQL JSON documents into structured relational Postgres tables, migrating user auth records, and remapping foreign keys.
How to fix Supabase JWT refresh token authentication drops?
Fixing Supabase JWT refresh token drops requires adjusting token expiration windows, configuring auto-refresh handlers in client SDKs, and securing HTTP-only cookie storage.
Can strict Supabase Row Level Security policies prevent data leaks?
Yes. Strict Supabase Row Level Security (RLS) policies prevent data leaks by restricting row access to authenticated token owners, blocking unauthorized API request payloads.
How to setup Supabase webhook triggers for external API workflows?
Setting up Supabase webhook triggers requires configuring Database Webhooks on specific table events (INSERT/UPDATE) to dispatch JSON payloads directly to target HTTP endpoints.
How long does it take to build a complete production Supabase backend?
Building a production Supabase backend, configuring authentication, setting up database tables, and connecting APIs typically takes 3 to 7 days depending on architecture scope.
