CA Firm Android App Development

I need an Android application built specifically for my chartered accountancy firm so that we can manage clients more efficiently. The single, non-negotiable feature for this first release is secure document sharing. Each client should be able to log in, upload or download files (PDF, Excel, images, etc.), and receive a push notification when new documents are available. On my side, I want a simple dashboard to assign files to individual client profiles and track whether they have been viewed.

Security and ease of use are my top priorities, so please incorporate best-practice encryption for data in transit and at rest, along with fingerprint or face unlock support if the device allows it. A clean, professional UI that carries our firm’s branding would be appreciated.

Deliverables
• Android app (phone-optimised, minimum target SDK 24)
• Admin dashboard or integrated admin panel for document assignment
• Source code in a private Git repository
• Short hand-over guide covering build steps, environment setup, and key modules

Acceptance criteria
• A client can register, sign in, upload, and download documents without crashes or timeouts.
• Documents remain inaccessible to any user other than the intended client.
• Push notifications trigger within five seconds of a document upload in testing.
• Codebase passes a quick security scan for common Android vulnerabilities.

I’m open to using native Kotlin with Android Jetpack components or a reliable cross-platform stack if it meets the same security and performance standards. Let me know how you plan to tackle secure storage, notification handling, and user authentication, plus a realistic timeline for an MVP launch.