BizFlow

Enterprise-Grade Multi-Tenant POS & Inventory Management System

BizFlow is a high-performance Point of Sale (POS) and Inventory solution built with .NET 10 and ReactNative. Designed for scalability and resilience, it features a sophisticated multi-tenant architecture and hardware integration capabilities for modern retail environments.

Tech Stack

• Backend: .NET 10 (ASP.NET Core), MediatR (CQRS), Entity Framework Core
• Frontend: ReactNative, TypeScript, Tailwind CSS, Shadcn/UI
• Database: PostgreSQL (Multi-Schema Tenant Isolation)
• Architecture: Clean Architecture, Domain-Driven Design (DDD)

Key Features

• Multi-Tenant Engine: Advanced schema-per-tenant isolation with a custom StoreMigrationWatchdog that automatically patches and updates store-specific schemas on demand.
• Dynamic Promotion Engine: Flexible pricing logic supporting "Buy X for Y" bundles and tie-up product discounts, calculated in real-time via the CalculatePrice engine.
• Hardware-Ready: Native support for ZKTeco biometric fingerprint enrollment and RFID-based employee attendance tracking via bridge APIs.
• Inventory Intelligence: Automated "Low Stock" and "Near Expiry" alert engine designed to minimize business wastage and optimize stock levels.
• Global Security Filters: Centralized architectural enforcement of data isolation and soft-delete logic (IsActive/IsDeleted) using EF Core Global Query Filters and Expression Trees.
• Real-time Analytics: Interactive dashboard providing instant insights into revenue, order counts, and inventory health.

Architectural Highlights

The system follows Clean Architecture principles to ensure a strict separation of concerns, making the codebase highly maintainable and testable:

• Domain: Core business logic, entities (utilizing PostgreSQL xmin for concurrency), and domain exceptions.
• Application: Use cases, optimized DTOs, and MediatR Commands/Queries for a decoupled request pipeline.
• Infrastructure: Data persistence via Entity Framework Core with custom multi-tenant schema switching and external service integrations.
• API: RESTful endpoints with custom middleware for tenant context identification, error handling, and structured logging.

Getting Started

Prerequisites

• .NET 10 SDK
• Node.js (v20+)
• PostgreSQL 16+
• (Optional) Arduino IDE for hardware module development