Architectures

• Monolithic Architecture

• Layered Architecture

• Clean Architecture

• Modular Monolithic

Architecture Patterns&Principles

• KISS

• YAGNI

• Separation of Concerns (SoC)

• SOLID

• The Dependency Rule

• Horizontal Scaling

• Load Balancer

• Monolithic-First Strategy

Non-FR

• Availability

• High number of Concurrent User

• Maintainability

• Flexibility

• Testable

• Scalability

• Reliability

• Re-usability

FR

• List products

• Filter products as per brand and categories

• Put products into the shopping cart

• Apply coupon for discounts

• Checkout the shopping cart and create an order

• List my old orders and order items history

https://www.techtarget.com/searchapparchitecture/tip/Understanding-the-modular-monolith-and-its-ideal-use-cases