Hello.
I am Sergey Tolkachyov. Joomla core contributer. See my PRs on Joomla GitHub. One of the publishers of the telegram channel of the Russian-speaking Joomla community JoomlaFeed, one of the moderators of the Russian-speaking Joomla coomunity chat. My extensions in the official Joomla Extensions Directory.
Developing Joomla websites and Joomla extentions.