How do you build a similar online shopping system that stores an inventory of products under different categories, allow customers to search through them, and make purchases. Furthermore, how do you handle the expanding load on the website and prevent it from crashing down, particularly on busy days, such as the Black Friday Sale?
Step 1 - Understand the problem and establish the scope
Features ?
See below functional and non-functional requirements.
Supported devices ?
laptop/desktop, mobile.
Functional requirements
User Profile Management
Product on boarding
Select Product
Search Product
Cart facility
Proceed to buy
Non Functional requirements
Consistency
Availability
Latency
Step 2 - High-Level Design
3 major flows could be considered : Product on boarding, Search Product & Cart / buy Product.