Background

The sales team was growing more mobile, and the backend needed to support it. Before any mobile app could be built, the foundation had to be right:

• Architectural Limitations: The existing system wasn’t structured to handle the complexity of a full sales force operation. Business logic, data access, and API concerns were all tangled together, making the codebase fragile and difficult to extend.
• Lack of Connectivity: There was no reliable API backbone capable of supporting real-time data synchronization between field devices and the central office.
• Cost-Efficiency Mandate: Management required a highly cost-effective hosting strategy. We needed to build the new backend using ASP.NET Core to enable deployment on Linux VPS environments, drastically reducing monthly infrastructure costs compared to traditional Windows servers.

Solution

I built Force Sales Cloud as the dedicated backend infrastructure for the sales force operation, implementing a Clean Architecture approach with a strict 4-layer structure. The goal was to separate concerns clearly so the system could evolve — new features added, infrastructure swapped — without ever touching the core business logic.

Implementation

The architecture was divided into four layers: Domain for core logic, Application for use cases, Infrastructure for data persistence, and Presentation for the Web API surface. Entity Framework Core was used to scaffold the existing legacy database, modernizing data access without disrupting the live database structure.

A Repository Pattern with Dependency Injection was applied throughout for clean data abstraction, making the codebase easier to test and maintain over time. The RESTful endpoints were designed specifically for high-speed synchronization between the Flutter mobile app and the central logistics database. Deployment was handled through a dotnet publish workflow integrated with IIS for consistent, high-availability service delivery.

Impact

• The 4-layer architecture gave the team the confidence to add new features without risking regression in existing business logic.
• Legacy database access was modernized through EF Core Scaffold with zero disruption to the live environment.
• API response times were optimized for mobile sync scenarios, reducing latency during high-volume transaction loads.
• The backend became the single reliable source of truth connecting field sales activity to central administration.