Business ERP System
A complete business ERP system for inventory, sales, purchases, accounting, reporting, warehouse management, and role-based operations with transaction-safe financial and stock workflows.
Project Overview
A complete ERP system built from the ground up to manage core business operations including inventory, warehouses, sales, purchases, accounting, expenses, payments, suppliers, reporting, and user permissions from a centralized platform.
The system includes 64 PostgreSQL database tables, 227 REST API endpoints, 36 business reports, and 128 role-based permissions across 15 modules. I designed and developed both the frontend and backend architecture, including database structure, business logic, APIs, dashboards, reporting, authentication, and real-time functionality.
A major focus of the project was transactional correctness and data integrity. Critical inventory and financial operations use PostgreSQL transactions and row-level locking to prevent overselling, duplicate invoice numbers, inconsistent stock, and race-condition related issues under concurrent usage.
Key Features
- Multi-Warehouse Inventory: Manage inventory across multiple warehouses with stock transfers, stock adjustments, movement history, and real-time stock availability.
- Complete Sales Workflow: Quotation → Sales Order → Invoice → Delivery → Collection with support for partial payments and product returns.
- Purchase Management: Supplier management, purchase workflows, supplier ledgers, payment vouchers, and purchase-related financial tracking.
- Accounting System: Chart of accounts, expenses, account transfers, payment transactions, collections, and running account balances.
- Advanced Reporting: 36 business reports covering sales, purchases, inventory, accounting, payments, suppliers, and operational data with Excel and PDF exports.
- Role-Based Access Control: 128 granular permissions across 15 ERP modules with configurable user roles and access control.
- Transaction-Safe Inventory: PostgreSQL transactions and row-level locking prevent overselling and inventory inconsistencies during concurrent operations.
- Invoice Audit Trail: Tracks invoice modifications field-by-field with the previous value, updated value, user information, timestamp, and required edit reason
- Controlled Invoice Editing: Invoices remain locked by default while administrators can grant one-time, time-limited permission to a specific user for editing a specific invoice.
- Real-Time Notifications: Socket.IO based real-time notifications and administrative force-logout functionality.
- Export & Document Generation: Business reports and operational documents can be exported to Excel and PDF.
Screenshots
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