# Hire a Supabase developer for RLS, auth and edge functions > Hire a Supabase developer for RLS, auth, edge functions and storage: fixed-price checks and fixes in your own Supabase project, delivered as pull requests. Canonical: https://app369.com/service/hire-supabase-developer/ App369 is one Supabase developer, Simon Dziak, who checks and fixes existing Supabase apps. A Launch Check of the whole app is $450 in 3 business days, with each problem ranked and a fixed quote to fix the worst. One bug you can name in a React, Vue, Flutter or Node.js app on Supabase starts with a $450 diagnosis in 3 business days. Fixed prices [**All fixed-price offers**](https://app369.com/fixed-price/) - [from $450**AI-Built App Rescue**A Lovable, Bolt or Cursor app checked end to end in 3 days, then its worst problems fixed at a fixed price.**See scope and start**](https://app369.com/fixed-price/ai-app-rescue/) - [from $450**App Fix Ticket**One reproducible bug in an existing mobile or web app, diagnosed and fixed.**See scope and start**](https://app369.com/fixed-price/flutter-firebase-bug-fix/) Something else? [**Describe your project**](https://app369.com/contact/) Check it yourself ## **How do you check a Supabase app before hiring anyone?** Supabase’s docs say a secret key bypasses every Row Level Security policy, and that RLS should be on for every table in an exposed schema. These 3 checks need your code and the SQL editor. | **Check** | **Run this** | **A pass looks like** | | --- | --- | --- | | **Is a secret or service_role key outside your server code?** | `grep -rniE "service_role\|sb_secret_\|eyJ[A-Za-z0-9_-]{20,}" . --exclude-dir=node_modules --exclude-dir=.git` | Matches only in server code, such as Edge Functions or API routes, that read the key from an environment variable; the name SUPABASE_SERVICE_ROLE_KEY there is fine. A key in front-end code, a mobile app or a committed .env file means anyone can bypass RLS: rotate it in your dashboard, then move it. Long strings starting eyJ are tokens; a legacy secret key hides its role inside one, so read each hit. | | **Is RLS off on any table?** | `select tablename from pg_tables where schemaname = 'public' and not rowsecurity;` | No rows. Any table listed is readable and writable through the API by any role with a grant on it, which on most projects includes the public key. The RLS fix page has two more checks for policies that allow everyone. | | **Which storage buckets are public?** | `select id from storage.buckets where public;` | Only buckets meant for anyone to see, such as avatars or marketing images. Supabase says public buckets skip access control for reading files, so anyone with a file’s link can open it. | What gets fixed ## **What does a Supabase developer fix?** - 01 ### **Row Level Security that leaks data** Tables with RLS off, policies that allow everyone, and policies that let one user read another’s rows, found with SQL and fixed in a migration. [**Supabase RLS fix before you launch**](https://app369.com/service/supabase-rls-fix/) [**RLS enabled, data still exposed**](https://app369.com/fix/supabase-rls-enabled-still-exposed/) - 02 ### **Keys in the wrong place** A secret or service_role key in front-end code or a shipped app, moved to the server, with you rotating the key in your dashboard, so nothing in the browser can bypass RLS. [**Service role key exposed**](https://app369.com/fix/supabase-service-role-key-exposed/) - 03 ### **Sign-in that breaks** Sessions lost on refresh, email links pointing at localhost, users logged out by refresh tokens, and OAuth providers that won’t connect. [**Session lost on refresh**](https://app369.com/fix/supabase-session-lost-on-refresh/) [**Auth email links go to localhost**](https://app369.com/fix/supabase-auth-email-links-localhost/) - 04 ### **Edge Functions that fail** CORS errors, non-2xx responses and timeouts traced to their cause and fixed in the function’s code. [**Edge Function CORS error**](https://app369.com/fix/supabase-edge-function-cors-error/) [**Edge Function non-2xx status code**](https://app369.com/fix/supabase-edge-function-non-2xx-status-code/) - 05 ### **Queries, migrations and connections** Empty results under RLS, failed db push migrations and too many connections, fixed without touching your production data. [**Select returns an empty array**](https://app369.com/fix/supabase-select-returns-empty-array/) [**Migration failed on db push**](https://app369.com/fix/supabase-migration-failed-db-push/) Market rates ## **What does it cost to hire a Supabase developer?** Hire marketplaces and expert networks fill page 1 for this search, and most quote by the hour. These figures come from their own pages, read November 8, 2026. - **✓**### **Arc: $60 to $100+ an hour** Arc’s Supabase page says freelance Supabase developers typically charge $60 to $100+ an hour, and $75 to $95 in Eastern Europe or Latin America. - **✓**### **Codementor: $8 to $40 per 15 minutes** The ten Supabase experts listed on Codementor’s page, read the same day, charged $8 to $40 per 15 minutes. - **✓**### **App369: $450 for a whole-app check** One fixed price for a written report, paid before it starts: each problem rated critical to low, with where it is and how it was confirmed, in 3 business days. At Arc’s typical $60 to $100 an hour, $450 buys about 4.5 to 7.5 hours. [**See the Launch Check offer**](https://app369.com/fixed-price/ai-app-rescue/) - Supabase - PostgreSQL - Row Level Security - Supabase Auth - Edge Functions - Supabase Storage - Next.js - React - Flutter Error fixes ## Supabase errors Simon fixes Each page covers one Supabase error, with Supabase’s docs as the source and what to check first. - [Supabase permission denied to change default privileges](https://app369.com/fix/supabase-permission-denied-to-change-default-privileges/) - [Supabase permission denied for schema auth](https://app369.com/fix/supabase-permission-denied-for-schema-auth/) - [Supabase AuthRetryableFetchError](https://app369.com/fix/supabase-auth-retryable-fetch-error/) - [Supabase relation does not exist (42P01)](https://app369.com/fix/supabase-relation-does-not-exist/) - [Supabase duplicate key violates unique constraint](https://app369.com/fix/supabase-duplicate-key-violates-unique-constraint/) - [Supabase Signups not allowed for this instance](https://app369.com/fix/supabase-signups-not-allowed/) - [Supabase AuthSessionMissingError](https://app369.com/fix/supabase-auth-session-missing/) - [Supabase infinite recursion in RLS policy](https://app369.com/fix/supabase-rls-infinite-recursion/) - [Supabase JWSError JWSInvalidSignature](https://app369.com/fix/supabase-jws-invalid-signature/) - [Supabase Email address is invalid](https://app369.com/fix/supabase-email-address-invalid/) - [Supabase User already registered](https://app369.com/fix/supabase-user-already-registered/) - [Prisma P1001 can’t reach Supabase](https://app369.com/fix/supabase-prisma-cant-reach-database/) - [Prisma prepared statement already exists](https://app369.com/fix/supabase-prisma-prepared-statement-exists/) - [Supabase OAuth provider disabled](https://app369.com/fix/supabase-oauth-provider-disabled/) - [Supabase Invalid login credentials](https://app369.com/fix/supabase-invalid-login-credentials/) - [Supabase PGRST116](https://app369.com/fix/supabase-pgrst116-single-row/) - [Supabase select returns empty array](https://app369.com/fix/supabase-select-returns-empty-array/) - [Supabase public storage bucket](https://app369.com/fix/supabase-storage-bucket-public/) - [Supabase Realtime not receiving changes](https://app369.com/fix/supabase-realtime-not-receiving-changes/) - [Supabase too many connections](https://app369.com/fix/supabase-too-many-connections/) - [Supabase logs users out on refresh](https://app369.com/fix/supabase-session-lost-on-refresh/) - [Supabase db push failed](https://app369.com/fix/supabase-migration-failed-db-push/) - [Sign in with Apple invalid_client](https://app369.com/fix/supabase-sign-in-with-apple-invalid-client/) - [Supabase Edge Function timeout](https://app369.com/fix/supabase-edge-function-timeout/) - [Supabase Email not confirmed](https://app369.com/fix/supabase-email-not-confirmed/) - [Supabase Database error saving new user](https://app369.com/fix/supabase-database-error-saving-new-user/) - [Supabase Edge Function non-2xx status code](https://app369.com/fix/supabase-edge-function-non-2xx-status-code/) - [Supabase Invalid Refresh Token logouts](https://app369.com/fix/supabase-users-logged-out-refresh-token/) - [Supabase Email link is invalid or has expired](https://app369.com/fix/supabase-email-link-invalid-or-expired/) - [Supabase emails going to spam](https://app369.com/fix/supabase-auth-emails-going-to-spam/) - [Supabase Failed to fetch on a published app](https://app369.com/fix/supabase-failed-to-fetch-published-app/) - [Supabase table not in the schema cache](https://app369.com/fix/supabase-could-not-find-table-schema-cache/) - [Supabase staging environment](https://app369.com/fix/supabase-staging-environment/) - [Supabase new row violates RLS](https://app369.com/fix/supabase-new-row-violates-row-level-security/) - [Supabase emails link to localhost](https://app369.com/fix/supabase-auth-email-links-localhost/) - [Supabase Edge Function CORS error](https://app369.com/fix/supabase-edge-function-cors-error/) - [Supabase service_role key exposed](https://app369.com/fix/supabase-service-role-key-exposed/) - [Supabase email rate limit exceeded](https://app369.com/fix/supabase-email-rate-limit-exceeded/) - [Supabase project paused](https://app369.com/fix/supabase-project-paused/) - [Supabase anon key in frontend code](https://app369.com/fix/supabase-anon-key-exposed/) - [Supabase RLS on, data still exposed](https://app369.com/fix/supabase-rls-enabled-still-exposed/) FAQ ## **Questions before you start**
**How much does it cost to hire a Supabase developer? ** App369 publishes fixed prices: a Launch Check of the whole app is $450 in 3 business days, and one named bug in a React, Vue, Flutter or Node.js app is an App Fix Ticket, a $450 diagnosis credited toward the $1,200 fix. Arc’s Supabase page says freelance Supabase developers typically charge $60 to $100+ an hour.
**What do I need to hand over? ** A repo invite, a test login and a schema export with no user data. Simon never needs your production keys, your secret key or your Supabase password.
**Will you touch my production data? ** No. Fixes ship as pull requests and SQL migrations you review and apply yourself.
**What isn’t included? ** New features or full rewrites, App Store approval guarantees, changes to your production data, your Supabase, Firebase, Stripe or hosting bills, and calls, except paid consultations ($100 per 15 minutes, paid upfront).
**Who does the work? ** Simon Dziak, who founded App369, does the work himself, in writing by email. His own product, Workspace369, runs on Firebase rather than Supabase; on Supabase apps the same access checks are done with Postgres row-level security, grants and policies.
### **Sources** - [Supabase docs: Understanding API keys](https://supabase.com/docs/guides/api/api-keys) - [Supabase docs: Row Level Security](https://supabase.com/docs/guides/database/postgres/row-level-security) - [Supabase docs: Storage buckets](https://supabase.com/docs/guides/storage/buckets/fundamentals) - [Arc: Hire Supabase developers](https://arc.dev/hire-developers/supabase) - [Codementor: Supabase experts](https://www.codementor.io/supabase-experts) Not a fixed-price job? ## **Describe it and get a written quote** Send what you need built or fixed. You get a written scope, a fixed price and a timeline; Simon replies by email, usually within one business day. [**Describe your project **→](https://app369.com/contact/) [**Instant quote**](https://app369.com/instant-quote/) Prefer a call? Consultations are $100 per 15 minutes, paid upfront.