Hello there!
I'm a senior web and mobile developer with over 3 years of experience working with PHP, NodeJS, *SQL, NoSQL (MongoDB) and JavaScript (vanilla, jQuery, Vue.js). I have also used other Web and UNIX technologies and performed system programming and optimization tasks.
I understand you're looking for people with experience in backend development of Drupal 9, with at least 3 years of experience working with Drupal specifically. From what you've described, I think I'm the perfect fit for this project! With my knowledge of back-end development from both PHP and NodeJS coupled with my expertise in web-based applications (specifically JavaScript), systems programming (specifically Python), database optimization (specifically MySQL), front-end web development (specifically JavaScript), and more, I'm confident that I can deliver an impressive product for you.
Thanks