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

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 that are multilingual and multi currency)... (Budget: $250 - $750 USD, Jobs: Linux, Nginx, PHP, System Admin, WordPress)