Develop New Website Functionality

I own an active website and would like to extend it with a brand-new function that is not yet in place. I will share the current codebase, hosting details, and any API keys you may need once we open the project so you can review the structure before touching a single line of code... (Budget: €250 - €750 EUR, Jobs: HTML, JavaScript, Node.js, PHP, Python, Vue.js, Web Development, Website Design)