Full stack is a term that refers to a programmer or developer who is able to work on different levels of a web application, from front-end to back-end.
This means that a full stack developer has skills and experience in working with various programming languages, frameworks and technologies that are used in various application layers. Typically, a full stack developer is concerned with designing, building and maintaining entire web applications, not just one part of them.
Thus, a full stack developer has knowledge and skills regarding both the front-end, i.e. the user interface and the code that works on the client side, and the back-end, i.e. the server layer and the code that works on the server side. As part of the front-end, a full stack developer deals with, among others, creating user interfaces, implementing functionalities, testing and optimizing the code. As part of the back-end, a full stack developer deals with, among others, database design and implementation, creating programming interfaces (API), handling requests and many others.
Thanks to the skills of a full stack developer, it is possible to manage the entire process of creating a web application — from design and planning to building and implementing. Full stack developers are usually in high demand in the job market because they are able to work across different levels of an application, which is especially important for smaller companies or projects that do not have separate front-end and back-end teams.
Hiring a full stack developer can bring many benefits to companies and organizations that are looking for a specialist with a wide range of skills and experience in working on web applications.

Faster product delivery time
A full stack developer is able to work at different levels of the application, which can speed up the process of creating a web application and delivering a finished product.

Support for various technologies
A full stack developer has the skills and experience of working with various programming languages, frameworks and technologies, which can be very helpful for projects that require the use of multiple technologies.

Cost savings
Hiring a full stack developer instead of separate front-end and back-end specialists can bring cost savings because one person is able to handle both levels of the application.

Faster response to problems
A full stack developer is able to react faster to problems related to the web application, because he can work at different levels of the application and find a solution to the problem faster.

Easier project management
Hiring a full stack developer can make project management easier, as this person is able to work at different levels of the application and coordinate the team’s work more effectively.

A more flexible and versatile specialist
A full stack developer has a wide range of skills and experience, which means that he is able to more easily adapt to different projects and client requirements.