• Back-end developer: Back-end is nothing but the Database connectivity, and Web services & Web API to write in the backend. It is the part which user cannot see. In backend developers works on backend logic for creating servers and focus on work with data base as well as with API.

• Full stack developer: It is a combination of both Front-end and Back-end technologies. Full stack can work on a web stack, mobile stack, or a native application stack.

Skills required for a Front-end Developer: –
• A front-end developer is commonly called “client-side developers”. It implements web designs through various coding languages like HTML, CSS, jQuery, and JavaScript, PHP.
HTML: It used to build webpage for front end portion.
CSS: It design and help to built web page presentable in simply form.
Java script: It help to build website interactive.
• Front-end developers should know about the front-end framework. Framework would be such a set of software resources and tools by which developer develop and manage websites as well as web services. Where library use for specific functionality help function, objects and modules set provided. Where technologies like Bootstrap, Typescript, Angular, React JS, Vue JS, EmberJS, which shows good UI part and it is a time-consuming framework to develop web applications for any devices.
In front-end framework and library are AngularJS a Java script open source frame work which use to built single page web application , it also help to convert static html to dynamic html. It can be use and change by anyone.
Bot Strap help to create responsive website and web application it open-source tool for development.
React js is a user interface tool help to build java script library which only responsible for application view layer.
jQuery its open-source java library which help to simply interaction b/w HTML and CSS.
SAAS It is very reliable and mature CSS extension language which help to extend CSS functioning.
Skills required for a back-end developer: –
• In back-end language use PHP which help to develop web development.
C++ it also helps to use in competing programming.
Java it also most popular language and highly scalable.
Java script used for both front end and backend programming.
Python It help to increase work speed and also help to integrate with system. There are many other languages like C#, Ruby, rest, go used for backend language.
• Backend engineers should know at least one server-side programming language like Java, Spring boot, Python, Laravel, Django, Ruby, .Net etc.
• A back-end developer commonly called as “server-side developers”, usually must work on Web Development Languages, Databases, Server, API (REST & SOAP).
• Backend framework are libraries of server with help to construct website with the help of note.js, it is open-source environment which runs on many platforms. It also provides java script modules rich library which simplify to development web application.
Express.js It is flexible note.js web application framework which help web and mobile application to provide strong set of features.
Laravel It is also one of the famous frameworks which help to give security to users and database.
As a Full-Stack Developer, One Needs to Master the Following Skills:
• Development of the front part of the website
• Handling of Databases in Back-end Development
• APIs and Web Servers Showcase the Fundamentals of Designing
• Control over Changes
• Creating user-friendly interfaces
• Developing APIs, logic, and databases for integration
• Identifying and fixing software bug

Benefits are as below:
Saves Money and Time
Full-stack development is cost-effective when the same developer works on both the front and back end. Hiring a full-stack developer lowers the cost of developing an application Therefore, a business need not invest twice as much in designing an application.
Quick debugging bugs:
While build of an application, if things do not function properly due to coding error, Full-stack developer familiars to analyze and resolve the bugs in little time.
Easy Updates and Maintenance
Developing apps using full-stack technology enables a developer to issue updates based on customer requirements.
All software product need data base, it is collection of efficient retrieval, insertion & deletion of data and arrange data to organize in a table, view, reports form.
Some are data base Oracle it helps to enquiry type data to retrieve.
Mongo dB It open-source SQL
SQL: It is standard relation database help to create, retrieve & delete.
Debugging: Software development pass through from heavy testing, updating, trouble shooting and maintenance and when errors and bug occurs quickly removed by debugging process .