Retail ERP System Development
Budget: $250 – $750 AUD
Build a modern, full-stack ERP system with integrated POS functionality, designed specifically for retail hardware businesses. The system should handle everything from point-of-sale transactions to comprehensive business management including inventory, purchasing, customer relationships, and financial operations.
Core Technology Stack
Frontend: React 18 + TypeScript with Vite build system
Backend: Node.js + Express.js with TypeScript
Database: PostgreSQL with Drizzle ORM
UI Framework: Radix UI + shadcn/ui components with Tailwind CSS
State Management: Zustand for global state, TanStack Query for server state
Authentication: Replit Auth with role-based access control
Key Functional Requirements
1. Point of Sale System
Real-time product search across 2,700+ products by name, SKU, barcode
Shopping cart management with quantity adjustments and discounts
Multiple payment methods: cash, EFTPOS, gift cards, split payments
Customer selection from Shopify database or guest checkout
Barcode scanning integration with instant lookup (8ms response time)
Stock level checking with backorder handling
Receipt generation (thermal 80mm and A4 tax invoice formats)
2. Inventory Management
Product catalog with variant support (2,700+ products, 1,900+ barcodes)
Real-time stock tracking with automatic deduction on sales
Low stock alerts and automatic replenishment suggestions
Price ticket printing (multiple formats including thermal)
Comprehensive product search and filtering
Stock allocation and release management
3. Shopify Integration
Bidirectional synchronization with Shopify store
Product, customer, and order sync with conflict resolution
Rate-limited API calls (100 points/second bucket capacity)
Webhook handlers for real-time updates
Click & collect order management
Gift card synchronization
4. Customer Relationship Management
Customer directory with Shopify integration
Order history and preferences tracking
Returns and exchange processing
Store credit and gift card management
Customer communication tools
5. Sales Order Management
Order processing workflow with multiple status tracking
Split fulfillment for partial shipments
FIFO picking system for warehouse operations
Picking slip and packing slip generation
Order approval workflows
6. Purchasing & Supplier Management
Supplier database and management
Purchase order creation and approval workflows
Stock receipt processing
Cost tracking and analysis
7. Document Management & Printing
Template system for business documents (invoices, quotes, receipts)
Thermal receipt printing (80mm format)
A4 document generation (tax invoices, picking slips)
Code-based template editor with live preview
Professional Harrison's Hardware branding integration
8. Financial Management
Tax calculation (GST 10%) with proper line items
Discount management (percentage and fixed amounts)
Payment processing and tracking
Cost of goods sold (COGS) tracking
Technical Specifications
Database Schema
Products table (descriptive data) + ProductVariants table (operational data)
Orders, Customers, Suppliers tables with full relational integrity
PrinterSettings, DocumentTemplates for system configuration
SalesOrders, PurchaseOrders for business workflow management
GiftCards, StoreCredit for customer loyalty programs
Performance Requirements
Product search: Sub-200ms response time
Barcode scanning: 8ms lookup time
Support for 10,000+ products with virtual scrolling
Real-time inventory updates
Concurrent user support without API rate limit conflicts
Security Features
Role-based access control (Owner, Admin, Manager, Staff roles)
Session management with PostgreSQL backing
Input validation and SQL injection protection
Audit logging for all transactions
Secure API endpoints with authentication middleware
Integration Requirements
Shopify Admin API integration with rate limiting AND XERO API FOR ACCOUNTING
Thermal printer support (80mm receipts)
Barcode scanner integration
Email notifications for various business events
Core Technology Stack
Frontend: React 18 + TypeScript with Vite build system
Backend: Node.js + Express.js with TypeScript
Database: PostgreSQL with Drizzle ORM
UI Framework: Radix UI + shadcn/ui components with Tailwind CSS
State Management: Zustand for global state, TanStack Query for server state
Authentication: Replit Auth with role-based access control
Key Functional Requirements
1. Point of Sale System
Real-time product search across 2,700+ products by name, SKU, barcode
Shopping cart management with quantity adjustments and discounts
Multiple payment methods: cash, EFTPOS, gift cards, split payments
Customer selection from Shopify database or guest checkout
Barcode scanning integration with instant lookup (8ms response time)
Stock level checking with backorder handling
Receipt generation (thermal 80mm and A4 tax invoice formats)
2. Inventory Management
Product catalog with variant support (2,700+ products, 1,900+ barcodes)
Real-time stock tracking with automatic deduction on sales
Low stock alerts and automatic replenishment suggestions
Price ticket printing (multiple formats including thermal)
Comprehensive product search and filtering
Stock allocation and release management
3. Shopify Integration
Bidirectional synchronization with Shopify store
Product, customer, and order sync with conflict resolution
Rate-limited API calls (100 points/second bucket capacity)
Webhook handlers for real-time updates
Click & collect order management
Gift card synchronization
4. Customer Relationship Management
Customer directory with Shopify integration
Order history and preferences tracking
Returns and exchange processing
Store credit and gift card management
Customer communication tools
5. Sales Order Management
Order processing workflow with multiple status tracking
Split fulfillment for partial shipments
FIFO picking system for warehouse operations
Picking slip and packing slip generation
Order approval workflows
6. Purchasing & Supplier Management
Supplier database and management
Purchase order creation and approval workflows
Stock receipt processing
Cost tracking and analysis
7. Document Management & Printing
Template system for business documents (invoices, quotes, receipts)
Thermal receipt printing (80mm format)
A4 document generation (tax invoices, picking slips)
Code-based template editor with live preview
Professional Harrison's Hardware branding integration
8. Financial Management
Tax calculation (GST 10%) with proper line items
Discount management (percentage and fixed amounts)
Payment processing and tracking
Cost of goods sold (COGS) tracking
Technical Specifications
Database Schema
Products table (descriptive data) + ProductVariants table (operational data)
Orders, Customers, Suppliers tables with full relational integrity
PrinterSettings, DocumentTemplates for system configuration
SalesOrders, PurchaseOrders for business workflow management
GiftCards, StoreCredit for customer loyalty programs
Performance Requirements
Product search: Sub-200ms response time
Barcode scanning: 8ms lookup time
Support for 10,000+ products with virtual scrolling
Real-time inventory updates
Concurrent user support without API rate limit conflicts
Security Features
Role-based access control (Owner, Admin, Manager, Staff roles)
Session management with PostgreSQL backing
Input validation and SQL injection protection
Audit logging for all transactions
Secure API endpoints with authentication middleware
Integration Requirements
Shopify Admin API integration with rate limiting AND XERO API FOR ACCOUNTING
Thermal printer support (80mm receipts)
Barcode scanner integration
Email notifications for various business events