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Last updated: October 1, 2015

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Paulo Arruda

Paulo Arruda

Linux System Administrator and Network Specialist

Canada - Tests: 4 - Portfolio: 1

My 9 years of experience in Linux Server Administration and Deployment, and 15 years of experience as Linux User, should be of interest to a rapidly growing company like yours. I've been working for the past 9 years building all kind of servers: from SOHO file servers to large mail deployments in HA/Virtualized/Cloud environments.

Groups: LPIC-2

100% Job Success
$80.00 /hr
486 hours

Jorge iii t M.

Jorge iii t M.

Asterisk / Linux / VICIdial / Elastix / FreePBX / VoIP / HylaFax

Philippines - Tests: 1 - Portfolio: 8

10 Years of I.T. Experience, more than 5 years solid/hands-on experience of Enterprise Callcenter Solutions, VoIP and Telephony. Installed, configured and support numerous Asterisk / VICIdial / Elastix / FreePBX / Trixbox / Switchvox Servers. I can provide Asterisk/ VICIdial / FreePBX / Trixbox install, configuration and support and as well as configure Digital and Analog Cards for ISDN and POTS such as Digium, Sangoma, Rhino and Openvox telephony cards. Skills include deploying, migrating and managing medium to large-scale Servers and desktop environments, designing and implementing system tools and automating operational tasks. Computer Telephony Integration, VoIP, Asterisk, VICIdial Predictive Dialer and Enterprise Callcenter Solutions/Dialers. Specialize in Linux System Administration (Slackware, Debian, CentOS, Fedora, Ubuntu,Opensuse), Freebsd/OpenBSD, bash, php, perl, tcp/ip, VoIP, Asterisk, VICIdial Predictive Dialer, Active Directory, RDP/Termninal Services, WAN/LAN/WirelessLAN and Other Enterprise Callcenter Solutions/Dialers. Dialer management and lead management, responsible for optimizing contact rate by managing all calling campaigns and strategies whilst working in a target driven environment.

100% Job Success
$22.22 /hr
2,189 hours

Yuriy N.

Yuriy N. Agency Contractor

Freeswitch/Asterisk/OpenSIPS/Kamailio/Linux/Network/VoIP Enthusiast

Russia - Tests: 1 - Portfolio: 1

Telecom Software and Network Engineer more than 6th years in companies - communication providers. I have extensive experience with deploying a complete infrastructure of voip provider, using OpenSource telephony technologies such as freeswitch, asterisk, OpenSIPS\Kamailio, kazoo, etc. Mostly I'm dealing with emerging startups or with small but accomplished voip companies which want to improve\reorganize their infrastructure; create something new or fix some issue on their network. So it is main area but sure I can help with other projects that correspond to my list of skills.

Associated with: Nasida

100% Job Success
$40.00 /hr
1,118 hours

Roman T.

Roman T. Agency Contractor

UNIX and security expert, network and system administrator

United States - Tests: 9 - Portfolio: 3

I'm a problem solver with technical and managerial experience, based out of Los Angeles. I love solving complicated problems by building elegant solutions and seeing the impact it has on a business's growth. I've always been interested in the technological field, specifically in information security and automation, which has made a huge impact on my work experience. However, I recently found myself involved in start-ups and helping with management, risk assessment and developing business strategies. I offer the following key services: o Security Audit o Network and Systems Administrator Services o Information Security Services o IP-PBX and VoIP softswitchs: installation and maintenance o Software development: Web, desktop and server applications o Complex solutions for business-process automation Experience Platforms: Cisco (routers, switches and ASA), Huawei (L2&L3 routers and switches), MikroTik, Ubiquiti, OpenStack. OSs: UNIX (FreeBSD, OpenBSD, *BSD, Solaris), Linux (Debian, Ubuntu, Kali, Gentoo, Red Hat, SuSe, uLinux, ASP, Mandrake, Fedora Core), MikroTik's RouterOS, VRP (Huawei), Windows 95/98. Languages: C/C++, UNIX Shell Scripting (Bash, Shell, sed, awk), Delphi (Pascal), Perl, PHP, Python, SQL, T-SQL, Assembler (Intel and AT&T SysV/386 syntax), GTK+ applications, Erlang, HTML, CSS, JavaScript, JQuery, JSON, REST API, XML, XSLT, DTD. Databases Engines: PostgreSQL, MySQL, Oracle, SQLite, Mnesia, MS Access, Sybase, DB2. Networking: TCP/IP, ISO/OSI, IPv6, Ethernet, VLAN (dot1q), ARP, VRRP, CARP, MPLS L2, MPLS L3, STP, GVRP, PPPoE, VPN, PPTP, L2TP, IPSec, OpenVPN, SNMP, SSH, XMPP, SIP, h323, BGP, OSPF, RIP, IRC, AJAX, Netflow. Virtualization: OpenStack, XEN/Server, Qemu, VMWare, FreeBSD Jail, Chroot. CMS: WordPress, Bitrix, osCommerce, Joomla, RoundCube. Panels: CPanel, Plesk, ISPManager, Webmin.

Associated with: IntLös

92% Job Success
$35.00 /hr
319 hours

Sysop X.

Sysop X.

Linux,Unix,Amazon EC2 (AWS),Load Balancing,High Availability

Pakistan - Tests: 9

Working with Linux/Unix system for more than 10 years. During this time I have designed, managed and secured various Linux based systems for my clients. Projects involving Web servers, Proxy servers, DNS servers, Database servers, Cpanel/WHM, Firewalls, App servers, Shell Scripting and Automation, Virtualization, Load balancing, High Availability, Cloud computing, Amazon AWS and overall system Security. I have also worked with various Embedded Devices, designed Linux based OS for such devices and Reverse Engineered protocols and communications. ==== Skills ==== ## Operating Systems : RHEL, CentOS, FreeBSD, ubuntu, Debain, SUSE etc ## Linux/Unix Servers : Dedicated,Virtual Dedicated(VPS),Shared Hosting ## Cloud Infrastructure Setups: EC2, Rackspace, Eucalyptus, Nimbula, CloudStack, OpenStack ## Cloud Management Setups: scalr, rightscale, enstratus ## Virtualization Setups: XenServer, Vmware, RHEV, VirtualBox, KVM ## Server Migration: cPanel, Plesk, Webmin/Virtualmin, Wordpress, Drupal, Magento, Joomla ## Network Storage: NAS, SAN ## Network File Systems: NFS, GFS, GlusterFS, AFP, SMB, Amazon S3 ## Redundant Storage: Hardware and Software RAID ## Service Optimization: apache, nginx, MySQL ## Monitoring Setups: BB, MRTG, Nagios, monit, munin, cacti, zabbix, zenoss ## Automation: Standard and Custom Backup solutions and other shell scripting. ## HA & FailOver: Database, DNS and WebServer Clustering/Replication and Content Distribution (CDN) ## Email Setup: Mass Mailing, Spam Filtering, DKIM, SPF, SenderID, Amazon SES ## Network/Server Security: Authetication, Firewall, IDS/IPS, AntiVirus/AntiMalware, DMZ, VPN, Amazon VPC, Logging ## System Hardening: Kernel/Software Patches, upgrades, unix permissions and user access control, file integrity solutions etc ## Security Compliance: PCI, GLBA, HIPPA ## Incident Response: Dis-infection from rootkits, viruses, worms, trojans and other malware.

$33.33 /hr
20 hours

Oleg Pavlov

Oleg Pavlov

Infrastructure Engineer

United Kingdom - Tests: 3 - Portfolio: 2

Expert level: -Mailing systems: Postfix, Exim, Qmail -Exchange 2003/2007/2010/2013 -Office 365 -SCCM 2012 -Project Management -PowerShell scripting -VBScript -Windows Server 2000/2003/2008/2012 -Active Directory -FreeBSD Technical Blog -

$27.78 /hr
4 hours

Jucalu Uy

Jucalu Uy

System Administrator


I have the ability to: - Install Linux, Windows, FreeBSD, ESX OS - Create the roles, groups and security settings that define the system in terms of permissions, access, and user rights. - System administration with ability to configure file systems, network parameters etc. - Familiarity with updating or modifying server hardware communications ([e-mail, IM,) connection solutions, including workstation connectivity, local area networks, company Web site, intranet, and Internet applications.

$20.00 /hr
0 hours

Sergey Sizov

Sergey Sizov

sys.admin, developer


I have big expirience Unix and Network administration. Worked with FreeBSD, Ubuntu, Debian. i know network protocols, can configure any firewall, QoS. Any service: Apache, Nginx, Tomcat, NodeJS, Asterisk, Zabbix, MySQL, PostgreSQL, RubyOnRails, Python(Django), Php, Java, etc... And now i work as programmer. Perl, Java, Python(Django), Ruby(Rails), PHP, JS, Html, css.

$5.56 /hr
0 hours

Ivan G.

Ivan G.

Sys-admin, web-dev

Poland - Tests: 9 - Portfolio: 1

I am sysadmin with 5+ years experience and webdev with 4+ years experiene I can build fully functioning web/mail server, from scratch. I can make site on popular CMS with custom design from scratch. I have experience in: Linux/UNIX, Mac OS X; MS Windows/Server, Virtualization technologies. I can build custom decisions for many tasks, from home router for internet sharing, to big fault-tolerant web-server. Also I have some experience in webdevelop, I developed a wide range of websites using HMTL, XHTML, CSS, PHP, and MySQL including sites for startup companies and small businesses. One of the last projects was my personal startup multiplayer games portal.

98% Job Success
$22.22 /hr
741 hours

Oscar Bass

Oscar Bass Agency Contractor

Senior UNIX System Engineer, LAMP, LEMP, Network Security, Cloud.

United States - Tests: 7 - Portfolio: 1

Expert UNIX system administrator and network engineer. Got a problem? I can solve it! For more than 15 years I have been the I.T. backbone and support for many online companies. I use the most up to date standards for any project I am involved in. I work extremely quick and efficiently. If you have a problem let me help you solve it. OS: Linux - Expert, FreeBSD - Expert, AIX - Expert, HP-UX - Expert, Macintosh OS/X - Expert, Windows Server - Proficient Cloud services: AWS, Rackspace, OpSource, Linode Web servers: Apache, Nginx, Tomcat Database servers: Mysql, Postgresql Monitoring: Nagios, Monit, Munin, Cacti Scripting: bash, perl, shell Virtualization: OpenVZ, Xen, SolusVM Mail servers: Postfix, Exim, Sendmail, Dovecot Control panels: cPanel, Plesk, Direct Admin, Webmin/Virtualmin, ISPconfig, OpenPanel Other: standard network services (DNS, DHCP, LDAP, Samba, SVN/Git, http proxy, jabber, backups, monitoring etc), firewalls (iptables, ipfw, pf)

Associated with: Bass Designs Agency

78% Job Success
$55.56 /hr
328 hours