Full Stack Developer Course in Chennai

A Full Stack Developer builds both the visible part of a website (the front-end) and the behind-the-scenes part (the back-end). They handle everything from designing user interfaces to setting up servers and databases, making sure the whole application works smoothly from end to end.

REST APIs help the front-end and back-end communicate with each other. They provide a way to send and receive data using specific URLs and HTTP methods. For example, if the front-end wants to display user details, it can make a request to the API, which fetches the data from the database and sends it back.

For the front-end, I use technologies like HTML, CSS, JavaScript, and frameworks like React or Angular. For the back-end, I work with Node.js, Express, or sometimes PHP or Python. For databases, I use MongoDB, MySQL, or PostgreSQL, and I also use Git for version control and tools like Postman for testing APIs.

One example is a task manager web app. I created the front-end using React, where users can add, edit, and view tasks. The back-end was built with Node.js and Express, handling API requests. I used MongoDB to store task details. I also added user login, form validation, and deployed the project online.

I write clear and organized code by using proper naming, comments, and consistent formatting. I break big tasks into smaller functions or components and avoid repeating code. I also follow best practices of the specific language or framework I’m using.

One challenge is syncing data flow between both ends. To handle this, I clearly define API routes and test them thoroughly. Another issue can be performance or security. I make sure to optimize the code, handle errors properly, and protect sensitive data with proper validation and authentication.

I test the front-end using tools like browser dev tools or testing libraries like Jest. For the back-end, I check API responses using Postman and write unit or integration tests. I also test the entire application flow — from user input to database update — to ensure everything works together properly.

SQL databases, like MySQL, use tables and fixed schemas — they’re good for structured data with clear relationships. NoSQL databases like MongoDB are more flexible and store data in JSON-like formats. I use SQL when data relationships are important, and NoSQL when I need speed and flexibility.

I usually use login forms in the front-end and verify the credentials in the back-end. If valid, I generate a session or token (like JWT) that the front-end stores securely. This token is then used to access protected routes or data.