Hello, I can do both front-end and backend. Mostly, I uses mern stack to develop web application. But for some complicated application I use mySql instead of mongodb. My very first project was just changing the html template to a react page. After that I got a spin-wheel project which include user interface for the customer, a dashboard for admin, and a backend server. I deploy this application on digital ocean ubuntu server using pm2,nginx, certbot (for ssl), and git ci/cd. After that I wrote an admin dashboard for a company local use, both ui and server. This site include a lot of feature and function.