Website on WordPress for mobile operator top-ups

Creating a website from scratch on WordPress
Writing a plugin for a payment gateway from scratch and for paying for services on the site
Writing a plugin to add internal balance functionality (with top-up from an external payment gateway) to the standard functionality of WooCommerce and the ability to pay with the internal balance
Writing a plugin to replace standard product cards on pages (changing WooCommerce behavior as well as the checkout process), as well as writing a plugin for ordering the number of translation pages for each service
Writing a plugin for managing mobile operators from the admin panel and creating vouchers for them
Multilingual support