I never look at web development and system administration differently. In the world of automation, web applications are no longer limited to portfolio sites. Completing a web application project doesn't just mean writing some back end code, writing some front end code, database implementation. Beyond that, you have to think about the future of the application! Situation after deployment.
 
i)   How is the system where I am going to deploy,
ii)  What is the traffic limit of my application,
iii) What is the data processing capability of my application,
iv) How will my server system behave when using maximum traffic, Crash or Give all the users a smooth experience using Load balancer.

For example, a human resource web application has to process a lot of data starting from machine attendance data, using api, providing api security. Each functionality creates a single thread, if the server system does not have the ability to execute these threads smoothly, then my fontend code and backend code are useless - the server is unreachable.

At last I want to say what I can do--
1) Frontend Design using Vue,js, Jquery, HTML, CSS, Vanilla JS, Nuxt.js
2) Backend Development using PHP, Laravel, Django, NodeJs
3) Api Development & manage security
4) Setup AWS cloud server, Digital Ocean, Heroku etc to deployee projects
5) Integrate CDN like cloudflare.
6) Application & Api Documentation well
....