To mention here, I am working as a Full Stack Drupal developer since 2008, here is a list of clients I have worked with in the past. It includes Drupal 10, 9, 8 & 7 versions as well as I am dealing with Drupal since 2008. I have upgraded multiple sites from Drupal 9 to Drupal 10 as well. 

I have written many custom modules in Drupal as well which are purely based on PHP OOP coding standards.

I use PHP CodeSniffer (PHPCS) extension in my VS code editor, so once I push my code to git, it detects any PHP coding standards errors before submitting the code to a git branch.

I converted beautiful FIGMA or ADOB XD designs to responsive HTML/SCSS layouts.

I have handled Linode (Ubuntu) based servers as well for the website installation, migration, and setting up Nginx or Apache there.