Development, Fundamentals Tuesday November 30, 2021

Fundamentals of the web application architecture

For several decades, web app development has advanced at an exponential rate. Static pages were in use in the past days. But now, the dynamic nature of web applications has wowed consumers and encouraged user engagement over time. But did you know that before you begin developing a web app, you need to first investigate what is web app architecture?

This complete blog will cover web application architecture, operation, components, types, models, and best practices.

Table of contents

What is web application architecture?
How does web application architecture work?
Types of web application architecture
Components of web application architecture
Models of web application architecture.
Bottom line

What is web application architecture?

Web application architectures represent the interactions between components such as user interfaces, transaction processing, databases, and so on. The fundamental goal is to guarantee that all pieces operate well together. These components work together to form web application architectures.

How does web application architecture work?

Web applications have two components: the front-end and the back-end.

The client-side of a web application is the part that interacts with users. HTML, CSS, and Javascript are used to create the front end. So, when a web application is launched, everything you view and interact with is classified as front-end.

The back-end, on the other hand, resides on the server and is unavailable to users. On the server, data is kept that may be quickly accessed and changed.

Developers use the following technologies to build the backend:

PHP, C#, Java, Python, Javascript, and so forth.

Types of web application architecture

Every form of web app component, regardless of its type, contributes to the creation of the integral web app. There are various forms of web app architecture between server-side and client-side, which are as follows:


  • Single-page applications (SPAs)

Single-page apps are becoming increasingly popular in this age of simplicity. A web page takes a long time to fully load, which degrades the user experience. However, SPAs do not enable the web pages to be entirely loaded. 

As a result, this provides a more engaging user experience, allowing the Single page apps and the user to engage more dynamically.

  • Server Side Rendered Apps (SSR)

On the server-side, SSR is used to convert the client-side Javascript framework to HTML and CSS. Because of SSR, the most critical assets are delivered rapidly, allowing the page to be rendered as soon as feasible. 

The server compiles the information and provides a new HTML page to the client-side with each request. When the CSS is received, the UI is developed without the need to wait for the JS to load.


  • Serverless architecture

A serverless design allows the app to run without being tied to infrastructure-related duties, and developers do not have to handle backend servers while working on third-party infrastructure.

  • Microservices

Microservices, in general, are lightweight and have minimal functionality that executes a single service. Furthermore, there are no limitations to working with technology or computer languages. It implies that developers can use whichever language they choose.

The execution of a single, specialized functionality using the Microservices Architecture framework enables developers to roll out applications more quickly and efficiently.

Components of web application architecture

Web components of several sorts are incorporated in the web app architecture. As mentioned below, these are primarily separated into two web application architectural components.

Structural components

The structural components of a web application are those that comprise the features that govern user interaction. 

  • The Web Application Server serves as the application’s core hub for its multi-layer and business logic. It is built using PHP, Python integrations, Node.JS, Ruby,.NET, and Java.
  • The Client, often known as the Web Browser, is where users interact with the web apps by using the features. It was created using JavaScript, CSS, and HTML.
  • The Database Server is the one that contains relevant information and business logic that the server manages. It provides users with information by retrieving, storing, and displaying it.

User interface app components 

It is concerned with the interface/experience rather than the development, and hence it deals with display dashboards, configuration settings, notifications, and logs, among other things.

Models of web application architecture

  • One database, one web server

The most basic and straightforward model utilized in web application architecture models is one database and one web server. As the name implies, developers create the application using only a single database and web server.

This is a popular concept for mobile application architecture. However, it has one limitation: if the server goes down, the entire program goes down. As a result of its limitations, the architecture is less suited for online applications.

  • One Database, Multiple Web Servers

This architecture is stateless and consists of at least two web servers. It is used to avoid unforeseen problems that cause failures.

For applications where data storage is not done utilizing web servers, a single database with numerous web servers is optimal. Instead, the web server processes the data and stores it in the database.

  • Multiple databases, multiple web servers

The architecture of several databases and many web servers is the most efficient and assures that neither web servers nor databases have a single point of failure. The models include two types of database models, both of which hold identical data and are spread uniformly.

Bottom line

As you can see, there is a diverse set of best web application architecture platforms, each with its own set of unique characteristics. 

The world is changing, and so is development, as we focus on the internet era. This is critical for creating web apps that are safe, responsive, resilient, and scalable. The web application architecture is taking over and has become a backbone for every web solution.

Ailoitte ensures that the key characteristics are kept in mind when designing the web app and incorporating vital elements into it. So, if you are intending to construct a web app and need assistance with its architecture, please do not hesitate to contact us.

Let's talk about your app

Hi, I am Sunil. Do you have any questions?
Feel free to get in touch