The problem
The application needed to support customers, delegates, administrators, and super administrators without requiring four separate mobile applications.
Objectives
- Support four distinct user roles in a single application.
- Implement role-based access control.
- Build the mobile application with Flutter.
- Use Firebase services for application data and backend integration.
The approach
Designed the application around role-aware access and workflows so different user types could use the same application with permissions appropriate to their roles.
The solution
Built a Flutter and Firebase water-bill management application with four roles: customer, delegate, admin, and super admin.
Implementation
Single-application architecture
A shared Flutter application serves all four user roles rather than requiring a separate application for each role.
- Customer
- Delegate
- Admin
- Super admin
Role-based access control
Role-aware application workflows separate the experiences and permissions of different user types.
- Role-specific access
- Permission-aware interfaces
- Shared application codebase
Firebase integration
Firebase provides the backend services used by the application.
- Flutter client
- Firebase integration
System architecture
The main architectural components and responsibilities involved in this implementation.
Flutter
Dart
Firebase
Role-based access control
Multi-role application
Engineering challenges
Multiple roles in one application
The application needed to distinguish four user roles while maintaining a shared application experience.
Permission boundaries
Role-based interfaces must be backed by appropriate authorization checks so restricted operations and data cannot be accessed merely by changing the client interface.
Outcomes
Delivered a water-bill management application supporting customer, delegate, admin, and super-admin roles within a single Flutter application. Quantified operational outcomes were not provided.
Capabilities delivered
Water-bill management
Multi-role application development
Role-based access control
Firebase integration