Udemy – Building Order & Inventory Management Systems – Python & AWS

“I know how to use AWS services, but I don’t know how to combine them into a usable business system…” “What kind of calculation logic do professionals actually use behind the scenes of an inventory management system?” If you have ever asked yourself these questions, this course is designed for you. This is not just another tutorial that explains how to click buttons in the AWS console. This is a hands-on practical course where you will step into the shoes of a backend engineer and build the core engine of an Order & Inventory Management System—the heart of any E-commerce or Warehouse Management System (WMS).

Why this course? Many tutorials teach tools, but few teach Domain Knowledge. In this course, we bridge that gap. You will learn the essential logic used in the logistics industry, such as:

• The critical difference between “Logical Inventory” and “Allocated Inventory” (Available to Promise).
• How to calculate Safety Stock and Reorder Points (ROP) to prevent stockouts.

You will implement these concepts using Python Classes, ensuring your code is clean, reusable, and robust. Then, you will deploy this logic onto a modern Serverless Architecture using AWS Lambda, Amazon DynamoDB, and API Gateway.

【Course Agenda】:

• Section 1: Introduction & System Design
  • Why inventory management matters (preventing Opportunity Loss & Overstock).
  • Designing a Serverless Architecture (API Gateway + Lambda + DynamoDB).
  • [Hands-on] DynamoDB Table Design & Environment Setup.
• Section 2: [Unit Test 1] Inventory Movement Logic
  • What is “Logical Inventory”?
  • Creating the InventoryManager class in Python.
  • [Hands-on] Unit testing for Inbound (Receiving) and Outbound (Shipping) using Lambda test events.
• Section 3: [Unit Test 2] Order & Allocation Logic
  • The concept of “Available Inventory” (ATP).
  • [Hands-on] Implementing “Order Allocation” logic and testing for “Insufficient Stock” errors.
• Section 4: [Unit Test 3] Reorder Point (ROP) Management
  • Calculation methods for Lead Time and Safety Stock.
  • [Hands-on] Implementing auto-calculation of ROP and Alerting triggers.
• Section 5: [Integration Test] Scenario Testing with API Gateway
  • Building the REST API with Lambda Proxy Integration.
  • Connecting to DynamoDB using Boto3.
  • [Hands-on] Executing a full business scenario (Order -> Ship -> Alert) using Postman.
• Section 6: Advanced Topics (Historical Data)
  • OLTP (Online Transaction Processing) vs. OLAP (Online Analytical Processing).
  • [Hands-on] Implementing an automatic inventory history tracking system using DynamoDB Streams.

【About the Instructor: Maruchin Tech】

After majoring in Computer Science, I started my career at a major Japanese Automotive Manufacturer, engaging in Supply Chain Management (SCM) operations such as packaging, logistics cost management, and procurement. I then transitioned to an IT Consultant role, specializing in system development for the manufacturing and logistics industries. Currently, I operate an independent EdTech business and create educational content on Cloud Computing and Programming as a Udemy instructor. Holder of all AWS Certifications (as of 2025).

Are you ready to build a system that works in the real world? Enroll now and let’s start coding!

DOWNLOAD LINK: Building Order & Inventory Management Systems – Python & AWS