BackEnd
PHP
MVC, PSR, Composer, Bitrix Framework D7 (ORM), Symfony, Laravel, Redis, RabbitMQ, Kafka
SQL
MySQL.
FrontEnd
HTML
HTML4-5, XHTML, XML, XSLT, HTL.
JS
ES5-6-7, React, JQuery.
CSS
CSS3, LESS, SCSS, PostCSS.
DevOps
Servers
Nginx, Apache.
CI/CD
GitLab CI, Azure DevOps, TeamCity, Jenkins.