2. What Is Back-End Development?
• Back-end development is the part of a website
that works behind the scenes. It handles the
logic, database, and server.
3. Front-End vs. Back-End
• Front-End: What users see (UI)
• Back-End: What makes it work (Logic, Data)
• Front-End uses HTML/CSS/JS
• Back-End uses Python, Node.js, PHP, etc.
4. Key Technologies Used
• Most popular back-end languages:
• - JavaScript (Node.js)
• - Python
• - PHP
• - Java
• - Ruby
5. What Do Back-End Developers Do?
• - Write server logic
• - Manage databases
• - Build APIs
• - Ensure security
• - Optimize performance
6. Databases
• Two main types:
• - SQL (MySQL, PostgreSQL)
• - NoSQL (MongoDB, Firebase)
• SQL is still most used.
7. APIs – How Systems Talk
• APIs connect front-end and back-end. For
example, when a user clicks 'Buy', the request
goes to the server.