I need a production-ready mobile app that can broadcast WhatsApp messages in bulk to every saved contact. The build has to ship for both iOS and Android from day one and sit on a scalable, micro-service architecture so we can plug in future modules without refactoring core code. Core flow • Users sign up either as Admin or Member. • Login must accept email + password by default, allow social media sign-ins, and prompt for two-factor authentication on sensitive actions. • Members compose or schedule a message; the app pushes it through WhatsApp’s APIs to all their contacts in one tap. • An Admin web portal lets me onboard or suspend users, edit roles, and export member data to our database for later analytics. Tech expectations Frontend: clean, responsive UI built in a modern cross-platform stack (React Native or Flutter are fine). Middleware & APIs: modular micro-services, versioned and fully documented. Backend: Azure-hosted, container-friendly, with secure storage for exported member records. CI/CD: code in a Git repo, automatic deployment to Azure with every approved pull request. Documentation: setup guide, architecture diagram, change-management log, and inline code comments. Acceptance criteria 1. Smooth release builds for iOS and Android in TestFlight / Play Console. 2. Verified WhatsApp bulk send reaching at least 90 % of test contacts. 3. Admin portal functions (user CRUD, data export) work without errors. 4. All authentication flows—email/password, social login, 2FA—pass security checks. 5. Git repository shows clean commit history and tags that match the documentation. If something here is unclear, let me know before you start so we can lock the scope.