I organize meetups and co-oganize conference in the Czech Republic in https://pehapkari.cz/
I have also experience with speaking at international meetups and conferences. For my references, see:
Tomas loves to combine open-source and innovations... yet he's super lazy. Traumatized in childhood by doing repeated tasks as a punishment by his father (whom he loves), he's unable to do anything twice without deep physical pain. That's why he always spends dozens of hours to automate problems that would take and hour or two to do manually.
This extreme lazyness created the Rector ecosystem. A tool that automatically upgrades and refactores PHP, so you can have a coffee instead while your code is upgraded from PHP 5.3 to PHP 8.1.