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Last updated: October 1, 2015

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Olexey Grinko

Olexey Grinko

Senior FreeBSD/Linux System Administrator

Ukraine - Tests: 6 - Portfolio: 2

I have more than 10 years experience in system administration: - Linux maintenance (CentOS, Debian, Ubuntu, CoreOS, RHEL); - DevOps (GIT, JIRA, Confluence, Bamboo, Continious Integration); - Cloud hosting (Amazon EC2, RDS, S3, DigitalOcean Droplets); - Virtualization: (Docker, VirtualBox, Vmware, Openvz, Xen, Hyper-V); - Web servers (apache, nginx); - Databases (MySQL, PostgresQL); - Monitoring (zabbix) - Mail servers (postfix, sendmail, antispam/ antivirus: clamav/spamassassin/amavis, courier, dovecot); - FreeBSD maintenance ; - Networking (DHCP, DNS, VPN, OpenVPN, firewalls: iptables/ipfw, proxies); - Windows Server (2008/2012); - Exchange 2007/2010; - Python programming.

98% Job Success
$27.78 /hr
1,153 hours

Umar Draz

Umar Draz

Sr. Unix/Linux System/Network Architect

Pakistan - Tests: 2 - Portfolio: 5

Senior systems architect, UNIX/Linux/Solaris, VMware, OpenStack and data-center administrator, software programmer, project leader with a proven track record of applying years of experience and good practices to the specification, architecture, design, implementation and maintenance of communications information technology systems. Well-versed in the latest computer languages, operating systems, network and system administration techniques, seeking a position where my hands-on self-motivating passion with the technology provides me with a unique understanding of how to balance conflicting requirements and bring complex enterprise level IT projects to a successful completion. Ability to work both independently and as part of a team, with demonstrated results in leading and contributing to projects, interfacing with stakeholders, while training and mentoring junior staff. Also great at troubleshooting complex problems. LANGUAGES: HTML, JavaScript, Perl, PHP, LAMP, Regular Expressions, Bourne/Korn/Bash/Csh/Tcsh Shells, Structured Query Language (SQL), Python. TOOLS: Application Servers (Apache, JBoss, Tomcat, Nginx,), DBMS (Access, DBase III/IV, MySQL, Oracle, MongoDB), UNIX Scripting (all UNIX Shells, AWK, Perl, SED), Security Hardening and Performance (IP Filter, Fail2ban), Storage, Moosefs, Virtualization (SANS, NAS, VMware vSphere Server/vCenter, OpenStack, Xen)

100% Job Success
$33.33 /hr
4,856 hours

Mykhaylo Dobrovolskyy

Mykhaylo Dobrovolskyy

Mykhaylo Dobrovolskyy

Netherlands - Tests: 7

10+ years of Linux/Network experience with different systems. Finished and delivered SMB solutions to big corporate companies lie BNP Paribas, ABN AMRO or RBS. My main areas of knowledge are: 1) Networking (Cisco/Juniper/F5/BlueCoat and Linux/FreeBSD based solutions like vyatta/pfsense etc) 2) Security - Cisco IPS/IDS, CheckPoint, Linux/FreeBSD based, Juniper etc 3) Linux administration - mail system, database (mysql/mysql cluster), server with high load average, load balancers for server farms (Cisco/F5 based and Linux based like keepalived or apache/nginx with reverse proxy) 4) VoIP - Cisco/OpenSource(Asterisk and different installations based on asterisks like freepbx/elastix etc) There is a very small piece of my knowledge, I'm always looking for opportunity to grow and I'm pretty sure that if you give me tasks - I'll find out best way howto get it done.

100% Job Success
$27.78 /hr
4,817 hours

Andres Montalban

Andres Montalban Agency Contractor

Cloud Architect / DevOps Engineer / Senior Linux Sysadmin / AWS

Uruguay - Tests: 6 - Portfolio: 3

Over the last 10 years I have worked with World Class IT Infrastructure configuring, deploying and maintaining routers/firewalls/servers all over the world using the most recent technologies. In the following list you will find my knowledge in the computer and network technologies: Linux servers and desktop administration Apache web servers running in Linux, Windows and Unix (FreeBSD/OpenBSD) Mail servers configuration/administration using qmail, Postfix and Exim Good experience with Cisco routers, switches and firewalls (PIX) DNS servers administration using BIND Control panels knowledge, Plesk, Cpanel, Virtualmin, H-Sphere OpenVPN client/servers configuration Untangle configuration/setup Asterisk setup/configuration using Asterisk source or using fully customized installations like Elastix Services and server monitoring using Zabbix, Nagios, BigBrother and Cacti Database servers using MySQL/MS SQL/PostgreSQL Windows 2000/2003 configuration/administration for AD purposes, Exchange Mail Servers, WWW/DB servers Samba deployments using LDAP backend to store user information Experience with Linux Clusters using Heartbeat and Linux Virtual Server NAS, iSCSI, SMB network storage knowledge. I have experience with FreeNAS and Openfiler Experience with IBM Bladecenter S using HS12 and HS21 servers, from build to put the servers in production using Gentoo/Samba/LDAP/GoSA and Asterisk for the HS12 OpenWRT installations and configuration using Routerboard/PCEngines embedded PCs pfSense configuration/customization I have installed Wordpress, SugarCRM, V-Tiger, OTRS, Zimbra, Roundcube, and many others open source software in production environments

Associated with: Global IT Solutions Agency

100% Job Success
$44.44 /hr
1,885 hours

Kristijan Spionjak

Kristijan Spionjak

Linux, Unix, VMware, Nagios, Apache, Postfix, MySQL, WHM/cPanel

Croatia - Tests: 4

Hello, Over the last 12 years, I have worked in the Internet service provider company, software development company and IT Training School. My major expertise is in general Linux/Unix, VMware vShere Hypervisor and vCloud Infrastructure and networking and systems administration and environment architecture. My Core Competencies are: Networking: dhcp, dns: bind/named, vpn: pptpd, openswan, firewalls: iptables, csf, apf, pf Web server: apache, nginx Mail server: Postfix, antispam/antivirus: ClamAV, SpamAssassin, Amavis, Dovecot Database: MySQL, PostgreSQL Monitoring: Nagios, Munin Hosting panel: WHM/cPanel, ISPConfig Windows 2003/2008 Server Windows 2003/2008 Active Directory Windows 2010 SP1 Exchange VMware vShere and vCloud: ESXi, vCenter, vCloud Director, vShield Vendor Certifications: CNI (Certified Novell Instructor - March 2005) LPIC-1 (Junior Level Linux Professional - October 2003) MCT (Microsoft Certified Trainer - October 2003) MCSE (Microsoft Certified Systems Engineer - October 2001) If you take me into considiration, I'm available on Skype, and E-mail for any informal interview or skill test. Looking forward to hearing from you. Regards, Kristijan Spionjak

100% Job Success
$22.22 /hr
2,221 hours

Sandeil T.

Sandeil T. Agency Contractor

Systems and Network Administrator

Philippines - Tests: 4 - Portfolio: 3

I have had the opportunity to work with companies which help me grow and improve my skills by sending me to trainings, seminars, and exposed me to scenarios which requires critical problem solving skills.A part of the hands-on trainings are Basic systems security, Linux systems administration, Oracle database administration, and Oracle performance tuning.On the job experience that enhances my skills are email system setup and maintenance, Linux system and firewall, DNS, OpenBSD/FreeBSD and packet filter, Windows system, and hardware and software trouble shooting.These skills and knowledge I want to share and further improve by providing competitive service and expertise to employers.

Associated with: Hyperbuddies Expedienet, RYVentures, LLC

100% Job Success
$7.78 /hr
2,792 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

Oleksiy T.

Oleksiy T. Agency Contractor

Senior Java Developer, Senior System Engineer

Ukraine - Tests: 3

For last 5 years I have been developing several large-scale web applications as a part of the team. My main responsibilities were: Development and improvement of Seam-based web applications; New features development; Prototyping using shell scripts; Development and optimization of server-side components; Creating Selenium tests used for regression testing; User Experience Improvement. Also I have done a few small Swing-based UI projects. I have experience in: Core Java, Ajax, TestNG Framework, Selenium, Shell Scripting, JavaScript, OOP/OOD.

Associated with: Gold Sky

100% Job Success
$50.00 /hr
6,369 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

Glenn Chen

Glenn Chen

Software Developer

United States - Tests: 5 - Portfolio: 13

Please let me know how I can contribute to your team. Have a wonderful day! - Python/Django - C++/Qt - Git/Mercurial - Code - Blog - Computer Science degree - Fujifilm e-system Photo Kiosk - sample work? feel free to check my portfolio pieces

$35.00 /hr
1,698 hours