New Build End-to-End RetireesParadise

I am spinning up a green-field SaaS that serves many facilities under one roof, so every line of data must respect facility-tagged, row-level security in PostgreSQL via Supabase. The stack is already chosen; what I need is someone who can put all the pieces together and ship production-ready code... (Budget: $1500 - $3000 USD, Jobs: AngularJS, FastAPI, n8n, Next.js, Node.js, NoSQL Couch & Mongo, OpenAI, PostgreSQL, Python, REST API)