Guilherme E.

• A five­ year experience with providers, managing mission critical servers. • Wide knowledge in net/system infrastructure (UNIX, Linux and Windows) • Strong experience in the development and architecture of high performance web system, using parallel and distributed programming, with millions of daily access. • Solid Knowledge in script language such as Perl, Shell Script, and PHP. • Experience in UNIX/Linux distributions, such as CentOS, Red Hat, FreeBSD, Debian, Fedora, among others. • Experience in the conception and management of large mail structures (Postfix and qmail), WEB (Apache, TomCat and Oracle Application Server), database (MySQL and PostgreSQL), firewalls (Iptables, Ipchains, Ipfw, and PF). • Experience in planning, implementation and management of high availability clusters and load balancing for mail structures, WEB and VoIP. • In­depth knowledge in file servers (SAMBA, NFS, Rsync), authentication, (FreeRadius, Radiator), VPNs (PPP, Vtun, IPSec, Freeswan, GRE), backup (Bacula, ArcServer), and proxy (Squid). • Basic knowledge to manage CISCO network equipment, such as routers and switches.