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In this video.

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Let's talk about what is back and development and who is a back end developer and what are the rules

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as a back end developer?

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All right.

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So let's get started where a back end developer is a software engineer who specializes in the development

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of server side applications.

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When we say server side meaning back end application, the person specialize how to implement the business

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logic using server side programming languages.

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So now that we know who is a back end developer, let's look at the roles or the responsibilities as

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a back end developer.

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Well, the first responsibility or role as a back end developer is to implement the business logic of

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an application.

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So all the business logic of any web application resides in the back end side of the application.

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The next row is a back end developer act as the server side counterpart to front end web developers,

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meaning that as a back end developer, we need to know how to work with front end developers as well.

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And apart from that, a back end developer also write test and debug server side code.

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Any time there is a problem or some bug in in the code, we always contact the bug end developer.

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Let's say that.

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Well the person cannot log into the application that is.

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What about back into fix that where the server is down?

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We need to fix that.

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The next responsibility as a bug end developer is to write, test and debug server side code.

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So any time a web application shut down or is not functioning well, it is the responsibility of the

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person or the back end developer to fix it.

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Assuming the server is down is the responsibility of the back end developer to fix it.

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And also after you're finished writing your code, you need to test before it goes into production or

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goes to live.

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And after that, the back end developer also design, develop and implement web based applications.

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It's almost the same as implementing the business logic of web application, and after that the person

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also needs to develop and maintain server side API.

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So the core objective as a back end developer is to develop API, which is application programming interfaces.

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And we are going to use MongoDB, Node.js and experts to develop our own API based on the business logic.

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All right.

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And after that, the person needs to be able to manage server side code libraries.

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Definitely.

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If they are going to work with Node.js or any programming languages, you need to work with libraries

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and what they are going to use for backend development is called Xpress.

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Apart from that, we are also going to use some packages as well to ease the responsibility of the back

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end developer to manage all these packages and libraries being used in a web application.

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And also the backend developer responsibility is to optimize the website code for performance, which

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means that the application must be fast and convenient for client use.

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All right.

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And also the person needs to handle server side security, which is really important, because if you

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don't take care, hackers can chip in or can pop in in the application.

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So you need to put all these things in place as a back end developer.

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All right.

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So now that we know who is a back end developer and the rules of back end development in this video,

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let's have a look at the programming languages that you need to learn before we can be a back end developer

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in the next video.