What is Mobile Backend architecture?

      A web service or an application consists of two main parts: the front-end and the back-end. In order to define backend for apps and web services, it is better to explain what front-end is and then compare it to the backend. The front end, also called “client-side” programming, is what happens in the browser, everything the end users see and interact with. The clients are anything that sends requests to the back-end. They are often browsers that make requests for the HTML and JavaScript code that they will execute to display websites to the end-user. However, there many different kinds of clients: they might be a mobile application, an application running on another server, or even web enabled smart appliance. This code (typically HTML, CSS, and JavaScript) runs in the user’s browser and creates the user interface. It is the part that you can “see”. The colors, animations, layout, and all the other cool stuff that adds to your experience of using the app or website is the frontend. The backend, on the other hand, happens on the server (on-site, or in the cloud) and databases. It’s the machinery that works behind the scene, everything the end-user doesn’t see or directly interact with, but that powers what’s happening. The back-end is the code that runs on the server, that receives requests from the clients, and contains the logic to send the appropriate data back to the client. The back-end also includes the database, which will persistently store all of the data for the application. Backend is an important part of a mobile app that is responsible for data storage, security, and business logic. An app backend is much like a server for mobile apps, as it stores and sorts the important information that the end-user does not see. Since backend development deals with what can’t be seen immediately from the user experience, one of the key responsibilities of a backend developer is to ensure the efficiency and responsiveness of an app. This is very important and app responsiveness is a factor that makes or breaks the app experience for users. Back-end architecture consists of three main parts: Servers, Databases, and Middleware.

backend app development, backend application, architecture

What is a Server?

The server is a computer that receives incoming requests from the client. These high-powered computers provide shared resources that networks need to run, including file storage, security and encryption, databases, email, and web services. Though there are machines made and optimized for this particular purpose, any computer that is connected to a network can act as a server. In fact, you will often use your very own computer as a server when developing apps. The data that the server sends back can come in different forms. For example, a server might serve up an HTML file, send data as JSON, or it might send back only an HTTP status code. Server-side languages used by developers are Ruby, PHP, Python, Java, and .Net.

What is a Database?

Databases are the brains that make websites dynamic. They are commonly used on the back-end of web applications. These databases provide an interface to save data in a persistent way to memory. Storing the data in a database both reduces the load on the main memory of the server CPU and allows the data to be retrieved if the server crashes or loses power. Whenever you request something on the website, it is database responsibility to accept that query, get the data, and return the response to the website or application. The client can change the information in a database from the browser and the database can accept this new and edited data. Many requests sent to the server might require a database query. A client might request information that is stored in the database, or a client might submit data with their request to be added to the database.

backend architecture, the difference between backend and frontend, database

What is Middleware?

Middleware describes any software on the server that makes the connection between an application or web front-end and its back-end. Middleware is any code that executes between the server receiving a request and sending a response. These middleware functions might modify the request object, query the database, or otherwise process the incoming request. Middleware functions typically end by passing control to the next middleware function, rather than by sending a response. It is like a plumping in the site and it pipes any communication, like requests and responses, back and forth between your application and your server/database. Middleware (server-side software) facilitates client-server connectivity, forming a middle layer between the app(s) and the network: the server, the database, the operating system, and more. Middleware can be multi-layered, organized into different layers of a site, whether it’s the presentation layer or the business layer. This is also where Web APIs can play into the stack, providing a bridge between the business layer and presentation layer. Good middleware can also maximize IT efficiency and power things like user engagement, business process management, content management, authentication, and more.

A majority of sites are built on PHP, making it one of the most popular back-end scripting languages. But there are plenty of others to choose from. For instance, you may want to use the processing power of Python for a data-driven site, or leverage the speed of lightweight languages like Ruby for faster prototyping. It’s up to you and your developers, and every language has its pros and ideal applications. Java, C#, C++, Perl, Scala, Node.js, and .Net are the most popular languages used for backend development. Popular frameworks used by developers are Django for Python, Spring framework for Java, MeteorJS and EXpressJS for JavaScript with Node.js, Ruby on Rails, Symphony for PHP, and JSF.

backend programming languages, frontend programming languages, framework

The backend is thefoundation. It is done last of all for certain requests from the application, including promptly reworking after it has been raised.

The application itself is difficult to change because it is on the client-side. And the backend always remains in your power, therefore, the requirements for quality are lower, and for testing, and for the choice of architecture, and for optimization.

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