Build a Secure SaaS Web App: Real-time Chat + Auto-Vault Document Management (Next.js/Supabase)

I am looking for an individual developer to build a secure, mobile-first web application. The core functionality is a WhatsApp-style 1-on-1 chat interface where every shared file is automatically captured and permanently stored in a secure, categorized document vault... (Budget: ₹12500 - ₹37500 INR, Jobs: Mobile App Development, Nest.js, Next.js, Node.js, PostgreSQL, Progressive Web Apps, React.js, Socket IO, Tailwind CSS, Typescript)