I am the king as php and sysadmin
developer in php + javascript + jquery + javascript
based data management: mysql & sqlserver
Linux system administrator and windows (CentOs, Ubuntu, Fedora, Debian, Red Hat) and Windows Server all version.
I created hooks and addons with the API whmcs
I have 9 years experience as developer
I have 12 years experience as sysadmin (cpanel, webmin, solusvm, proxmox, whm, whmcs, wordpress)
I am what you need for your project