Contact person: Flutter Supabase Google OAuth Integration

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Location: Torroella de Montgrí, Spain

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"My Flutter mobile app already talks to Supabase for data, but the Google sign-in flow is still missing. I need someone who has actually wired up Supabase authentication with Google OAuth inside a Flutter project and can hand me working, well-commented Dart code.

Here’s where things stand
• Supabase project is live and email/password auth runs fine.
• No Firebase is involved—Supabase only.
• Client and server redirect URIs are not yet configured for Google.

What I need from you
1. Configure Google Cloud credentials and add the provider in my Supabase dashboard.
2. Implement the Flutter side using supabase_flutter (or compatible package) so that calling a single function opens the Google account picker, completes the OAuth handshake, and returns a valid Supabase session object.
3. Show how to persist the session, detect an existing logged-in user on app launch, and sign out cleanly.
4. Supply concise setup notes so I can repeat the process for staging and production keys.

Deliverable
• A small reproducible Flutter module (or a PR against my repo) plus a brief README walking through any console settings and required package versions.
If the demo runs on both Android and iOS simulators without manual tweaks, I can merge immediately.

I need the signIn with google on my code to work with iOS and Android, the other things work." (client-provided description)