Hello, I am a full stack web developer.
First of all, i own a company that i developed the website, and it uses a booking system. It is the same as you needed. So i can absolutely take this job, as i have previously done it. Please PM me for my company website so you can take a look :)
I always work with Javascript (Nodejs) and become really decent at it.
I usually do my frontend thing using ReactJS and my backend server using express, you can say i am really comfortable in MERN Stack.
I do write my stylesheets in SCSS/SASS.
I usually building unit test while building a project for better development.
I am also decent at python for data analysis and machine learning, Java and PHP.
That's why you can be assure that i can handle all, from building to deploying to your server.
Please consider me to work with you!
Thanks!