Web Application Architecture: Defining Its Functionality, Components, and Layers

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It’s the world of apps! Developing web applications provides a row of advantages to every organization’s niche. You are eventually making your project more profitable and your organization more successful. According to Emergen Research report, the worldwide progressive web application market value is expected to cross USD 10.44 Billion by 2027, with a compound annual growth rate (CAGR) of 31.9%.  

Web scraping tools enable users to gather large volumes of data quickly and efficiently, making it an essential tool for researchers, data analysts, and businesses seeking to gain insights, monitor competitors, or aggregate data for various purposes. These tools usually allow users to define the specific data elements they want to extract, and some advanced tools can handle complex data structures and anti-scraping mechanisms.

That’s remarkable, right? 

 Web application development involves a lot of aspects and factors. And belong from a technical background, I’m sure there are times when we start a new web app project and get confused about deciding the exemplary web application architecture (an essential aspect of web app development).  

Wondering why only web app architecture? And why is it so important? The architecture we choose decides all other details of the development process, like its functionality, features to add, interaction with other components, and determining the best web application development services. Therefore, you require the right components for your web app’s technical success.  

There must be so many questions popping into your mind. Feeling stressed already? There’s nothing to worry about! I’m here to answer all your questions. 

So, this article will briefly describe the fundamentals of web application architecture. We will learn about web app architecture, its types, working, significant components, layers, and the best practices for web server architecture. Let’s read on! 

What is Web Application Architecture? 

Web application architecture is a framework comprising all the interactions and connections between different application components. It is a systematic workflow for all the simultaneous interactions between an app’s user interfaces, middleware systems, databases, and servers. 

It is also designed for a superior web experience. It logically presents the connections between the client and server side. It involves every component that a fully functional web application comprises. Architecture involves all the external app exchanges, components, and subcomponents. The web app architecture technically indicates the primary responses to server and client requests. 

Web application architecture is responsible for a smooth web application development process and predicting its security, scalability, and speed requirements. It provides organizations with better commercial advantages. 

How Web Application Architecture Works? 

In working on a web application architecture, two separate programs (buckets of code) run simultaneously. They are as follows: 

  • Server-Side Code
    The server-side or backend code has two responsibilities: to answer HTTP requests, return responses to the users, and save different data. You can develop backend code from other programming languages, including PHP, Ruby, Python, Java, C#, etc. 
  • Client-Side Code
    It refers to frontend (HTML (Hyper Text Markup Language), CSS (Cascading Style Sheet), JavaScript) code that answers user requests, inputs, and produces the visual representation or user interface (UI). 

In web application architecture, the architects (developers) must choose what the frontend and backend code should do in connection. Yet, always remember that these code decisions are top-level, so apt choices should be made.  

Importance of Web Application Architecture 

Customers in today’s tech-fast world have high expectations from their web and mobile apps. And to be honest, they do deserve smooth app experiences. Several activities influence user experience, like how valuable, easily findable, reasonable, accessible, popular, suitable, and helpful they think the app interactions are. While end users cannot view the web app architecture, all the critical decisions made at the architecture level can influence the end user’s ultimate experience. 

The web app architecture is a combination of different application components, layers, and their interactions. And your choices directly impact the overall web application’s effectiveness and properties like scalability, user experience, reliability, and security. Following are the properties that’ll make you realize why web application architecture is essential: 

  • User experience 
  • Authentication 
  • Security 
  • Speed and reliability 
  • Scalability 
  • Automation 
  • Error logging 
  • Analytics and testing 
  • Reliability  

Furthermore, you get answers to different questions at the web architecture level. Questions include the overall cost of web app development and maintenance, the availability of relevant skills in your development team, development time, and the overall time-to-market.  

Different Components of Web Application Architecture 

Web application architecture consists of two essential components known as structural and user interface app components. 

  • Structural Components
    Judging from the name itself, these components help to form the application’s structure. They consist of the web app server, database server, and client or web browser responsible for functions determining the user interactions within the app. Most developers use HTML, CSS, and JavaScript to build these components. But remember, it can vary as preferred by a web app developer. 
  • User Interface Components
    The second major component is the user interface components that help to enhance the application’s visual interface. However, contrary to structural elements, there’s no interaction between the architecture and user interface. Hence their work is only to display the web page. These components contain different visual details, including settings, dashboards, notifications, widgets, etc. The visual elements help in enhancing the user experience. In simple words, these components are responsible for the UX of the web app.  

Any web application development services provider should thoroughly understand these components to develop high-performance web apps.  

Different Layers of Web Application Architecture 

The four essential layers of web application architecture are: 

  1. Data Access Layer – The access layer offers easy access to stored data in definite storage like binary files and XML. This layer also handles the functionalities of CRUD (Create, Read, Update, Delete).  
  1. Data Service Layer – The data service layer transfers the processed data by the Business Logic Layer directly to the Presentation Layer. It also separates the business logic from the client side, guaranteeing data security. 
  1. Business Logic Layer – The business logic layer allows proper data exchange. It defines the business logic standards and functionalities. For example, when you sign into the website, it resembles the business logic layer. 
  1. Presentation Layer – The presentation layer presents the UI and makes user interaction effortless. It involves UI components that deliver and present data for end-users. Furthermore, it provides all the essential data to the client side. Also, its focus is to display the outcomes, convey them to data service, receive input data, and process users’ requests.  

Tips and Tricks for Best Web Application Architecture 

Organizations may have working apps, but it is also essential to have efficient web architecture. Following are some tricks and tips every application development company should follow to build a good web application architecture: 

  • Build architecture that solves issues systematically and uniformly 
  • Is it as easy as possible 
  • Supports modern standards, such as analytics and A/B testing  
  • Provides fast response times 
  • Uses security protocols to minimize any chances of malicious penetrations 
  • Does not crash (important for any software) 
  • Cures itself  
  • It does not include a single point of failure 
  • Scales out easily 
  • Enables for easy development of known data 
  • Errors logged in a user-friendly approach 
  • Automatic deployments 


In today’s highly competitive and fast-paced software world, providing efficient services and creating top-notch products is insufficient to win your client’s trust. But how you deliver the services and products to your clients also matters.  

And how’s it possible?  

You can take the help of web applications. Organizations need to develop and deploy affordable, highly performant web applications that provide clients with superior UI/UX experience, deliver speed, and are high-performance. This is why it’s crucial to design exemplary web app architecture. And for this, you can also hire a reputable web application development company. They can help you build the most efficient web app architecture, eventually helping you gain your customers’ trust.   

That’s all from my end. 

I hope you like the article.  

Happy learning! 

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