Senior Full-Stack Developer for SaaS Booking Platform

Booking I run a live multi-tenant SaaS booking platform for beauty & wellness studios in Austria/DACH. I'm the founder and sole developer and looking for a long-term development partner. Stack: Supabase (Postgres, RLS, Edge Functions), TypeScript, Netlify, Stripe, Resend, Anthropic API. GitHub is the single source of truth. Scope: feature development, security hardening, per-customer backup & restore, AI features, GDPR compliance, ongoing maintenance, and monitoring. Requirements: 5+ years full-stack, 2+ years Supabase/Postgres including RLS, multi-tenant SaaS, Stripe, and LLM APIs. NDA + DPA required, EU-based preferred. Start with a paid test task, then propose engagement model, first-3-month plan, and pricing.