Software architecture defines how systems are structured, how their components interact or communicate, and how they evolve.
From Application Architecture to Enterprise Architecture, understanding each type helps teams build scalable, maintainable, and efficient software systems.
In this post, we’ll explore different architecture types, popular design styles, fundamental design principles, and real-world system design examples.
Types of Architecture
1. Application Architecture
- Scope: Limited to one or more applications within a larger system.
- Examples:
- Mobile app
- Core Java application
- JavaScript web app
- Server-side application
Purpose:
Defines the structure and behavior of a single application — its layers, modules, and data flow.
1.1 Mobile Application Architecture(Android App).
MVVM is a type of Layered architecture in Presentation layer of the Android application. It helps in separating the concerns and structuring the code into logical and functional groups. View represents Android UI Views (Activity,Fragment,Views/Layouts), ViewModel contains presentation logic and Model represents everything else in the application.
Model layer from MVVM contains another architecture style called “Layered Architecture“. Components like Repository, Service, Dao class, RestClient classes form Layered Architecture. Requests flow from ViewModel to Model Layer ( Repository->Service->Dao or RestClient classes) and response flows in backward direction. The calls between layers are Synchronous which is the main characteristics os Layered Architecture.
2. System Architecture
- Scope: Broader — covers multiple applications working together.
- Hierarchy: Application architects report to system architects.
- Examples:
- Banking system
- E-commerce platform
- Online ticket booking system
- Payment gateway system
- Smart parking system
Purpose:
Defines how different applications, databases, and middleware components integrate to form a complete system.
Popular System Architectures are :
- Client-Server (integrated via REST API)
- Event Driven Architecture
- Tiered Architecture
- Microservices
3. Solution Architecture
- Scope: A high-level design of a system that solves a specific business problem.
- Output: Conceptual blueprint or “solution” that may later evolve into a full system architecture.
Example:
Designing a cashless toll collection solution before finalizing what the entire traffic management system will look like.
4. Technical Architecture
- Scope: Deep technical details of how a system or application will be built.
- Focus: Technologies, frameworks, APIs, and integration specifics.
Example:
If a banking system includes a mobile app:
- The Mobile App Architect defines its app architecture.
- Technical Architects for each platform define implementation details:
- Android: Activities, Services, SQLite DB
- iOS: ViewControllers, Core Data, etc.
5. Enterprise Architecture
- Scope: Software ecosystem of an entire enterprise.
- Goal: Align business processes, data, and technology across departments.
Examples:
- ERP, Payroll, Timesheet, Accounting, Finance, HR systems
- Logistics company using software for:
- Workforce management
- Inventory & sales
- Customer service
- Finance and marketing
Role:
An Enterprise Architect designs and integrates all systems across the organization.
Popular System Architectures
| Architecture Type | Example / Use Case |
|---|---|
| Web Server | Pipeline architecture |
| SOA (Service-Oriented Architecture) | Component-based |
| Client–Server | Layered architecture |
| Single-Tier | Monolithic architecture |
| Cloud Systems | Tiered (multi-network) architectur |
Architectural Patterns
MVC (Model–View–Controller)
- Defines how data (Model), user interface (View), and business logic (Controller) interact.
- Primarily an application-level pattern.
MVP (Model–View–Presenter)
- A variant of MVC.
- Presenter handles both logic and UI updates, simplifying view components.
Event-Driven Architecture
- Event: User action (e.g., button click)
- Listener: Component registered to handle an event
- Handler: Method that processes the event
Example (Android): A button click handler in the below code snippet is registering for click event. it receives the event when the button is clicked. here the handler (subscriber) and the button event generator( platform layer component) aren’t connected or tightly coupled but still they are communicating indirectly and asynchronously which is the beauty of EDA. EDA is only used in specific cases. not for every requirements,
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Event handler logic
}
});Pipeline Architecture
Used primarily in web server design — data flows through sequential processing stages (pipelines).
Influencers in Architecture & Design
- Gang of Four (GoF): Pioneers of design patterns
- Martin Fowler: Defined modern architectural styles and software design methodologies
Layer vs Tier
| Term | Meaning |
|---|---|
| Layer | Logical separation of concerns (may or may not be physical) |
| Tier | Physical separation of systems (e.g., client tier, server tier, database tier) |
Summary
- Application Architecture → single app design
- System Architecture → multi-application integration
- Solution Architecture → high-level conceptual solution
- Technical Architecture → deep technical blueprint
- Enterprise Architecture → entire organization’s software ecosystem
Combined with strong design principles (abstraction, encapsulation, cohesion, coupling), these help architects build systems that are scalable, flexible, and future-proof.
Suggested Tags
#SoftwareArchitecture #SystemDesign #EnterpriseArchitecture #DesignPrinciples#Kotlin #Flutter #AndroidDevelopment #Microservices
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Title: Understanding Software Architecture Types and Design Principles
Meta Description: Learn about application, system, solution, technical, and enterprise architectures. Includes design principles, real-world system examples, and architectural styles like MVC, MVP, and event-driven design.