Part time system sys admin required - php, nginx, centOS, vesta, php-fpm, linux servers, redis

We need a system admin to replace our current guy. We currently have 2 servers - 1 is a database server that stores large databases and the other is used for websites (around 30 Wordpress websites). Work will be pretty small and very simple for a good system admin. One day we might have some work (checking backups, transferring tables, copying sites to other domains inc SSL setup, speed profiling, bug identifying, setting up a new server etc) some days there might be nothing to do. Ideally you will be on Skype most of the day (Skype text) and are very easy to get hold of and are very responsive. We normally pay a fixed monthly fee regardless of what is done. You should be an expert in the following - - Linux servers CentOS 7 (setup and hardware config) - Vesta control panel - Redis - Nginx (especially expert in caching) - Wordpress / woo commerce setup / config (including caching, cookies, sessions) - Speed profiling and reporting - very important to be able to run software and identify exact page load speed issues and improvements necessary. - Bug identification - PHP 7 - php-fpm - Maria DB - rsync - fail2ban - Apache httpd - Dealing with large data - Good all round / full stack programmer inc JS Initial work is to copy sites to new domains and try and get better page load speeds for Wordpress using nginx and server config. We pay monthly $600