Month 2: Core Backend Development - Detailed Roadmap

Week 1: Authentication & User Management
Complete JWT authentication system with refresh tokens
Implement role-based permissions (admin, vendor, customer)
Create user management APIs (CRUD operations)
Implement password reset functionality
Set up email notification service for auth events
Week 2: Advanced Product Models
Implement product relationship models
Create image upload middleware for products
Develop product variation/options system
Implement product search with filters
Create product categorization system
Week 3: Inventory Management
Design and implement inventory tracking system
Create warehouse management functionality
Implement stock level tracking and alerts
Develop inventory adjustment operations
Create inventory reporting endpoints
Week 4: Order System & Frontend Setup
Design and implement order models with line items
Create shopping cart data model
Implement basic order workflow states
Set up webhook system for order notifications
Initialize React projects (admin & customer site)

Multi-Vendor Configuration System

Enhance feature flag system to control vendor-specific operations and permissions

Build configurability for single/multi-vendor mode with appropriate database schemas

Technical Implementation Details

• Authentication: JWT tokens with secure refresh token rotation and storage
• User Management: Role-based access control with permission inheritance
• Product System: Flexible schema for variants, options, and relationships
• Inventory: Event-based inventory tracking with transaction history
• Order System: State machine implementation for order processing

Month 2 Deliverables

• Complete authentication system with roles and permissions
• Advanced product data model with variants and relationships
• Comprehensive inventory management system
• Order processing system with workflow states
• Initial React project structure for frontend applications
• Enhanced feature flag system for multi-vendor capabilities

Key Technologies & Libraries

Mongoose Schemas
JSON Web Tokens
Nodemailer
Multer
Express Validator
State Machine Library
React
Webhook System