I will custom integration with old whmcs

I'm a Linux System Engineer that works on Enterprise Enviroments in Milan (Italy). I prefer work on clustered infrastractures, for example a big web site that need multiple server for performance reasons. In my job I need to manage Databases, Web Servers, Mail Servers, Application Servers, etc.. In my career I had work on: - Linux (Red Hat, CentOS, Ubuntu, Debian) - MS Windows (Win XP to 10, Server 2008 to 2016) - Database Server (SQL Server, MySQL Enterprise, Oracle) - Web Server (IIS, Apache, Nginx) - Application Server (JBoss, OC4J) - Mail Server (Exchange, Postfix, Exim) ... and much more