Multi-Tenant Water Supply Management Platform
Full-Stack SaaS ERP Module for Public Infrastructure - A government-grade utility management system replacing legacy Java desktop applications with modern cloud-based multi-tenant architecture supporting workflow approvals, mobile metering, and real-time billing.
Project Summary
Led the full-stack architecture and development of a government-grade utility management system built for multi-tenant deployment across local water authorities. The platform replaced a legacy Java desktop application with a modern, cloud-based system built using .NET Core, Angular, MySQL (EF Core), Android (Kotlin), and JasperReports — enabling document-driven workflows, role-based approvals, live metering, billing, and mobile operations.
About the Project
This platform was built for a set of regional government offices managing public water supply infrastructure. These organizations oversee infrastructure-level mapping, new connection applications, workflow-based supply approvals, meter readings and billing, and enforcement actions for delinquent accounts.
The existing system was a standalone desktop app built in legacy Java, prone to manual errors, delays, and not fit for multi-agency coordination. The new system needed to handle complex government workflows while maintaining security and compliance standards.
The Challenge
Legacy Java system was desktop-only with no cloud support, manual document handling, disconnected metering, and lack of real-time visibility across departments.
Outdated Tech Stack
Legacy Java system was desktop-only, with no cloud or mobile support and no tenant separation.
Workflow Bottlenecks
Manual document handling with no audit trail across multi-step approvals and unclear rejection loops.
Disconnected Metering
Manual readings with no field tools, printed bills handled offline, no integration with printers or SMS.
Lack of Real-Time Visibility
Management lacked real-time dashboards, delayed reporting, zero cross-department coordination.
Solution Implementation
Modern Backend Architecture
.NET Core API with EF Core ORM, multi-tenant data separation, and role-based authentication integrated with existing ERP SSO.
Dynamic Frontend & Mobile
Angular web frontend with configurable modules per tenant and Android app for field operations with offline support.
Workflow & Document Management
Multi-stage approval workflows with audit trails, document scanning, and automated rejection-retry processes.
Integrated Billing & Reporting
Real-time metering, automated billing calculations, barcode integration, and comprehensive dashboards for management.
Technical Implementation
Backend System
- • .NET Core (C#) API architecture
- • EF Core ORM with MySQL database
- • Multi-tenant data isolation
- • Role-based authentication & SSO
Frontend Web App
- • Angular (TypeScript) SPA
- • Configurable modules per tenant
- • Dynamic routing for workflows
- • Real-time dashboard updates
Mobile Application
- • Android app (Kotlin)
- • 4N/PDA portable device support
- • Offline sync capabilities
- • Barcode printing & SMS integration
Document Workflows
- • Multi-stage approval processes
- • Document scanning integration
- • Automated rejection notifications
- • Complete audit trail logging
Billing System
- • Automated usage calculations
- • JasperReports bill generation
- • Barcode integration for payments
- • Payment API integration
Analytics & Reporting
- • Real-time usage dashboards
- • Multi-tenant reporting
- • Payment status tracking
- • Disconnection alert system
Key Features Delivered
Infrastructure Management
- • Road and sub-road hierarchy mapping
- • Pipeline and meter location tracking
- • Water project management
- • Asset maintenance scheduling
Application Processing
- • Digital application submission
- • Multi-stage approval workflows
- • Document scanning and storage
- • Rejection handling with clear reasons
Mobile Field Operations
- • Meter reading with portable devices
- • Real-time bill printing
- • SMS notifications to customers
- • Offline data collection and sync
Multi-Tenant Security
- • Isolated data contexts per office
- • Role-based access controls
- • SSO integration with existing ERP
- • Configurable policies per tenant
Results & Outcomes
Modern Multi-Tenant Infrastructure
Multi-tenant deploymentSystem deployed across multiple local governments with each office operating under isolated configuration and centralized management.
100% Digital Application Flow
100% digital workflowsComplete digitization from connection request through approval to installation with integrated rejection-retry workflow and full audit trail.
Mobile Metering with Portable Printing
Real-time operationsField teams now complete readings, billing, and SMS dispatch in real-time with no manual syncing or Excel sheets required.
Improved Compliance & Transparency
Full audit trailEvery action logged by user, device, and location with dashboards giving leadership full visibility of water usage, revenue, and risk areas.
Key Deliverables
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