Frontend Technologies:

HTML for markup and to create the web page document
CSS to style the web page to look awesome
SASS / SCSS for CSS Preprocessor which compiles to the CSS when it is run on the server.
JavaScript for initial client side validations and User Interaction with the browser
jQuery with its UI Components for better UI / UX
We also use other front end languages based on customer requirements.

Backend Technologies:

NODE JS for asynchronous and cross platform that runs on the V8 engine.
We also use Python which is an interpreted high-level general-purpose programming language that emphasizes code readability with its notable use of significant indentation

For more information https://fsh.org.in/it-technologies