Cross-Platform Social Connection App

We need a team to build a full Social Connection Platform with:
• iOS App
• Android App
• Web App
• Admin Panel
• Backend (API + DB) + AWS Deployment

Key Features:
• User signup/login & profiles
• Search by job, location, radius
• Map-based user discovery
• 1-to-1 real-time chat (typing, read receipts, media)
• End-to-end encrypted messaging
• Push notifications (iOS/Android/Web)
• Google Ad Manager integration

Admin Panel:
• User management (block/allow)
• Role-based access
• Dashboard & analytics
• Audit/activity logs

Security Requirements:
• HTTPS, JWT
• Encryption at rest & in transit
• HIPAA-ready architecture

Please provide:
• Milestone-based cost & timeline
• Tech stack proposal
• Relevant past experience (chat, secure apps)