Senior Supabase/PostgreSQL Engineer

We need an expert to finalize two existing SaaS applications built with Lovable, React/TypeScript, and Supabase. Both apps are already developed and tested, and we need help resolving critical issues to achieve commercial readiness within 5–7 working days. Responsibilities include verifying and fixing Supabase RLS, JWT authentication, tenant isolation, and user permissions; resolving security and production issues; verifying backup/recovery and onboarding; preserving all existing features, workflows, dashboards, and UI; reusing existing tests; and providing a final readiness assessment and handover. Immediate availability and daily progress updates are required. No major changes without approval.