Closed-Community Collaboration App Development

Project Description: I need a mobile app developer to build a closed-community platform focused on collaboration and productivity. The app will serve a restricted user base. Technical proficiency in chat implementation and calendar widgets is required.

Please Note: Concept details shared after NDA.

Key Features / Scope:

Restricted Auth: Sign-up is strictly limited to users with specific email domains (Whitelist logic).

Networking Logic: Users can search and filter other users based on profile tags to connect.

Group Collaboration: Users can form groups to chat and share files (PDF/Images). Includes an in-app document viewer.

Productivity Module: Integrated Calendar for events and a personal To-Do list system.

Interactive Widgets: Native Home Screen Widgets (iOS/Android) displaying the user's upcoming schedule/tasks.

Messaging: Standard Instant Messaging features (Text, Media, Push Notifications).

Requirements:

Full-Stack Mobile Development (Frontend + Backend).

Experience with Flutter or React Native.

Proven experience creating App Widgets (please confirm this specifically).