I’m building CareSync, an AI-assisted medication manager that puts caregivers first. The goal is a seamless experience on both Android and the web where a single profile, stored in Firebase Firestore, keeps every prescription, reminder and adherence metric perfectly in sync. The stack is locked in: • Python Flask will expose a clean, versioned REST API. • Firebase Auth secures every call, and Firestore holds all structured data. • Android is written in Kotlin, following Jetpack best practices and a repository-pattern clean architecture. • A lightweight web dashboard (React, Flutter Web or another modern framework you’re comfortable with) should consume the same endpoints so information mirrors in real time. Core functionality I need you to deliver 1. Secure sign-up / sign-in that supports caregivers as the primary interactive role. 2. Medication module with CRUD operations and history tracking. 3. Reminder engine that schedules: – Daily medication alerts – Refill notices – Doctor-appointment prompts Push notifications must reach both mobile and browser. 4. Real-time sync across platforms; a dose marked “taken” anywhere should update everywhere within seconds. 5. Deployment-ready code with clear README, Firebase security rules, Postman (or Swagger) collection, and unit tests around the critical logic. Acceptance criteria • I install the backend on my own server, point it at my Firebase project, and all endpoints pass your provided tests. • I load the Android app on an emulator or device, add a medicine, and see the same record instantly on the web UI. • Each type of reminder fires at the correct time and records an audit entry in Firestore. • Code is clean, modular and documented; I can hand it to another dev without a long hand-over call. If this is a build you’d like to own end-to-end—backend, Android, and web—let’s talk timelines and milestones.