📦 Order Management Systems (OMS)

System Architecture

Built event-driven microservices architecture to handle high-volume order processing with real-time inventory updates and multi-channel order orchestration.

Core Services:

• Order Service - Handles order creation, validation, and lifecycle management
• Inventory Service - Real-time inventory tracking and allocation
• Fulfillment Service - Warehouse and shipping coordination
• Customer Service - Order tracking and customer communication
• Payment Service - Payment processing and refund handling
• Analytics Service - Order analytics and business intelligence

Key Features Built

🛒 Multi-Channel Order Processing

• E-commerce Integration - Shopify, WooCommerce, Magento connectors
• Marketplace Integration - Amazon, eBay, Walmart marketplace APIs
• B2B Portal - Custom B2B ordering portal with bulk ordering
• Mobile App Integration - Native mobile app order processing
• API-First Design - RESTful APIs for third-party integrations

📊 Real-Time Inventory Management

• Multi-Warehouse Support - Distributed inventory across multiple locations
• Real-Time Sync - Sub-second inventory updates across all channels
• Inventory Allocation - Smart allocation based on location and availability
• Safety Stock Management - Automated reorder point calculations
• Inventory Forecasting - ML-based demand forecasting

🚚 Fulfillment & Shipping

• Warehouse Management - Picking, packing, and shipping workflows
• Carrier Integration - FedEx, UPS, DHL, and local carriers
• Shipping Optimization - Best carrier and service selection
• Tracking Integration - Real-time shipment tracking
• Returns Management - Automated return processing and refunds

💳 Payment Processing

• Multi-Payment Methods - Credit cards, digital wallets, bank transfers
• Payment Gateway Integration - Stripe, PayPal, Square integration
• Fraud Detection - Real-time fraud screening
• Refund Processing - Automated refund workflows
• Payment Reconciliation - Automated payment reconciliation

📈 Order Analytics

• Real-Time Dashboards - Live order and inventory dashboards
• Performance Metrics - Order fulfillment time, accuracy rates
• Customer Analytics - Order patterns and customer behavior
• Revenue Analytics - Sales performance and trends
• Predictive Analytics - Demand forecasting and inventory optimization

Technical Challenges Solved

⚡ Performance & Scalability

• High Volume Processing - Handle 100,000+ orders daily
• Real-Time Inventory - Sub-second inventory updates
• Database Optimization - Read replicas and query optimization
• Caching Strategy - Multi-layer caching for performance
• Auto-scaling - Cloud-native auto-scaling based on load

🔄 Data Consistency

• Event Sourcing - Event-driven architecture for data consistency
• Saga Pattern - Distributed transaction management
• Eventual Consistency - Handling eventual consistency in distributed systems
• Conflict Resolution - Resolving inventory conflicts across channels
• Data Synchronization - Real-time sync across multiple systems

🔗 Integration Complexity

• API Management - Centralized API gateway for all integrations
• Webhook System - Real-time notifications to external systems
• Data Transformation - ETL processes for data standardization
• Error Handling - Robust error handling and retry mechanisms
• Monitoring - Comprehensive integration monitoring

Business Impact

• Order Processing Speed - 90% reduction in order processing time
• Inventory Accuracy - 99.9% inventory accuracy across channels
• Customer Satisfaction - 40% improvement in customer satisfaction scores
• Operational Efficiency - 70% reduction in manual order processing
• Revenue Growth - 25% increase in order volume through better inventory management

Technologies Used