Full Stack Developer: Migrate React/Vite App from Supabase to Keycloak & Test Stripe

We have a fully functional application built with React, Vite, and TypeScript. The backend utilizes PostgreSQL and PostgREST, deployed inside a Kubernetes cluster. The application is currently using a temporary Supabase configuration for authentication. We need an experienced full stack developer to help us harden the app for production by completing the following tasks: • Migrate Authentication: Convert the frontend auth so it communicates directly with Keycloak instead of Supabase. • Database Session Integration: Ensure the Keycloak JWT session integrates correctly with our PostgREST backend, updating any Row-Level Security (RLS) policies or database functions to decode and validate the Keycloak tokens. • Stripe Testing: Stripe is already fully integrated into the application. You just need to test the flow and verify that the webhooks and subscription statuses synchronize flawlessly with the new Keycloak auth setup. • Production Deployment Support: Assist with the final configuration updates during our production push. This is a fixed-price, short-term project estimated to take a couple of days for the right developer. The application is fully functional, containerized, and running. We just need a specialist to swap the authentication provider, map the token claims to the database, and verify the payment flow. Please highlight your experience with Keycloak JWT validation and PostgREST/Postgres RLS when applying.