CentOS Freelancers

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CentOS Job Cost Overview

Typical total cost of Upwork CentOS projects based on completed and fixed-price jobs.

Upwork CentOS Jobs Completed Quarterly

On average, 148 CentOS projects are completed every quarter on Upwork.

148

Time to Complete Upwork CentOS Jobs

Time needed to complete a CentOS project on Upwork.

Average CentOS Freelancer Feedback Score

CentOS Upwork freelancers typically receive a client rating of 4.85.

4.85
Last updated: May 1, 2015
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  1. Maxim Vorobey

    Maxim Vorobey

    Senior Software Engineer/Architect

    Russia - Last active: 1 day ago - Tests: 3

    I am a web application developer specializing in PHP/JS with 15 years of experience. strong OOP knowledge, MVC etc php, mysql, html, css, less, js, coffeescript twitter bootstrap, jquery, backbone.js, angular.js ajax, json, xml C/C++/Objective-C (just for fun) load balancing, big data, high traffic data scraping, data parsing saas, soap, rpc, rest phpunit, phpspec, tdd, bdd, xdebug symfony, symfony2, zend2, doctrine2, bitrix mysql, postgre, mongo (clustering, replications) memcached, redis, rabbitmq, sphinx ubuntu/debian/centos/archlinux/osx nginx, lighthttpd, node.js, apache2 git, mercurial, svn opengl, glsl api: paypal, facebook, twitter, livejournal, vkontakte, jira, mailchimp, mandrill, zendesk, amazon aws agile/scrum: jira, redmine https://github.com/n3b

    $69.00 /hr
    2,374 hours
    5.00
  2. Oleksandr N.

    Oleksandr N.

    Senior System Administrator, Migration and Security L3 engineer, SSD

    Ukraine - Last active: 1 day ago - Tests: 20 - Portfolio: 16

    YOUR POSITIVE FEEDBACK IS THE HIGHEST AWARD FOR ME ;) Will do my best to assist you in any questions and tasks you may have =) Here is some info about my experience. SUMMARY Specialties: Information Technology / Internet / IT Division / Computer security/ Internet Services / System Administration/ Webmaster Support / Web Analysis/ SEO / SEM / Internet Marketing Web hosting services (SSD hosting solutions) EXPERIENCE: d(-_-)b Linux/Windows system administrator, Operations team EuroVPS/WebDomSolutions January 2012 - May 2013 Greece, Athens Responsibilities: - Tickets; - System administration and monitoring. Theoretical and practical skills: - Operating Systems: RedHat/CentOS/Fedora, Debian/Ubuntu, FreeBSD, Windows Server 2003/2008; - Virtualization: Virtuozzo, OpenVZ, VMware, Onapp Xen, Apache CloudStack; - Setup/configuration: nagios, kayako, racktables, confluence, observium, nginx, php-fpm, liteSpeed, Apache CloudStack, Hostbill, WHMCS, redmine; - Control panels: Plesk, WHM Cpanel. - Database Administration: SQL Server, MySQL, MariaDB ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <( -'.'- )> freelancer SEO freelance October 2010 - March 2012 (1 years 6 months) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ o(^_^)o System Administrator / Techsupport Webintellects/Webhostgian/Jumpline/Webdomsolutions November 2010 - March 2012 (1 year 5 months) US, Ohio Responsibilities: - Live Chat support, Tickets; - System/Server/Control Panel administration; - Nagios monitoring; - Internet research and work with technical documentation. Operating Systems: * RedHat/CentOS,Fedora * Windows server 2003/2008 * VPS setup and configuration (Parallels Virtuozzo Containers); Advanced theoretical and practical skills in such areas: - Operating Systems: RedHat/CentOS/Fedora, Windows server 2003/2008; - Virtualization: VPS setup and configuration (Parallels Virtuozzo); - Security: Advanced knowledge of Linux security, Firewalls ( IPtables, CSF, APF, BFD, Fail2Ban), Encryption ( SSL), SSH, Host Security Auditing; - Software: Apache servers (versions 1.3.x/2.2), DNS (BIND 9), QMail, Sendmail, exim, LAMP, Plesk/Exim/Cpanel (installing/upgrading/maintaining), Drupal, Wordpress, Joomla, OsCommerce applications, Yum/RPM usage; - Database Administration: SQL Server 2003/2008, MySQL, MS access. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ b(^_^)d Internet Marketing Specialist || Web Analyst DCoM Soft, Inc. December 2009 – August 2010 (9 months) Responsibilities: - Internet Marketing strategy and tactics - Information architecture and Web site content planning - Research of partners - Internet Market Research - Research Usability Design - Online promotion of company's web-based products Skills: - Search Engine Optimisation (SEO) - Paid online Marketing / Pay per Click Management (PPC) - SEO Copywriting/Editing - Social Media Optimization and Marketing (SMO/SMM) - Experience running USA-targeted social Marketing - Writing press releases - Social networking (Twitter, Facebook, Google follow etc) - Google Products, AdWords/AdSense, Google Analytics, Webmaster tools, Google Merchant, etc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \(^_^)/ Customer Relations Representative || Advanced Technical Agent Ecommerce, Inc. May 2007 – October 2009 (2 years 6 months) Responsibilities: - Sales, billing and technical support in solving problems reported by clients; - Chat, helpdesk system, correspondence; - View, Adaptation, "repair" clients' sites; - Basic server/service diagnostic and reports to sysadmin department; - Internet research and work with technical documentation; - Work in team. Basic theoretical and practical skills in such areas: - Linux / Unix OS, Windows server 2000/2003, Windows XP/98; - Servers: Apache, bind, sendmail, ProFTP, MySQL, SQUID / SOCKS, MSSQL, Samba; - Easy coding: PHP, PERL / CGI, HTML, JavaScript, CF, ASP,. NET, C + +; - Widely used protocols (HTTP, HTTPS, SMTP, POP, IMAP, FTP (s), TCP / UDP, etc); - HSPHERE control panel (versions 2.3 and 3).

    $34.88 /hr
    1,242 hours
    5.00
  3. Boian M.

    Boian M.

    16yr exp - Linux Systems Architect / ISP / IT Consultant -

    Bulgaria - Last active: 1 day ago - Tests: 3 - Portfolio: 3

    * gathering customer's requirements (type of applications deployed) * specifying hardware * deploying (software and hardware installation, including in data centers) * technical writing on cloud-computing topics, security, High-availability, clusters and others * monitoring / profiling * management * architecture audits * virtual infrastructures based on KVM / OpenVZ / VMware / XEN / Sun Ray + Virtualbox * Fully-virtualized and HA architectures deployment (Proxmox, ESX, OpenStack) and network virtualization (Neutron); * network solutions based on Brocade / Cisco / HP / Mikrotik products * full internet provider development * providing adequate documentation in each stage (doc/pdf/Visio) of Linux/UNIX based systems, also managing small IT teams, looking for new challenging projects. * BIND, djbdns, mydns, ndns based DNS architectures; * Qmail / Exim / Postfix-based mail systems; * Websystems to include Apache / MySQL / PostgreSQL / PHP / Perl configurations; * Rails solutions; * Complete webhosting managment - Cpanel/WHCMS /Plesk etc.; * Backup solutions (EMC Retrospect, Open source solutions - Bacula, Amanda, ZRM etc.); * Cloud computing IAAS and PAAS(Amazon EC2, OpenStack) and related ecosystems (Ceph); * HA solutions : Pacemaker, Corosync, GlusterFS, MooseFS, DRBD, Ceph * Load testing (jMeter, Tsung, iozone, vdbench, ab, siege); * MySQL - single servers, Master/Slave configurations or Master/Master; * Tomcat/Resin based Java application servers; * Monitoring deployment and administration (Zabbix, Nagios); * Nagios / MRTG / Cacti monitoring and data acquisition; * Design/development and modification of PHP/Ruby/Perl-based web systems; * MVC framework development on Rais / CakePHP / Codeigniter; * Zibra, Zarafa, iRedMail, phplist, google apps, Also extensive experience in deployment and management of server configurations in data centers.

    $44.44 /hr
    6,229 hours
    4.97
  4. John Shipp

    John Shipp

    PHP/MySQL Developer,Javascript,Web Designer,Client and Server Side exp

    United States - Last active: 07/29/2014 - Tests: 10 - Portfolio: 20

    I started programming computers when I was eight years old, and, over the last 30 years, I've realized that I am, well, a programmer. That said, I do have the "people skills" necessary to remain competitive in the world of programming. When needed, I'm a "sit in the corner and program til the wee hours of the morning geek"... otherwise, I'm just a "fun to talk to, easy to get along with normal person". I have always enjoyed the challenge of creating interactive software. With the birth of the modern Internet, I found a new love in web development and web programming. I face every new piece of code as a fresh new beginning... a chance to do it even better, while, still using "what works" from the past. My objective, here at oDesk, it to provide potential employers with my expertise in the field of website design, development, and programming. My skill include, in no particular order: PHP MySQL HTML/HTML5 CSS/CSS3 JavaScript jQuery AJAX Big Data Laravel WordPress Magento CodeIgniter Zend Python PhpDocumenter (PHPDOC) XMPP, OpenFire Google Places API Angular.js Revive Adserver OpenX Adserver OpenX REST API Revive XMLRPC API BitBucket Web Scraping C# ASP.NET Classic ASP MSSQL Twitter API Facebook API Google API Google Maps API Google AdSense API Backbone.js Smarty MS Access Linux Apache nginx PHP Data Objects (PHP: PDO) MailChimp, MailChimp API Google GeoCode API MongoDB LAMP LEMP Ember.js IIS Photoshop Flash ActionScript Intuit Quickbooks API Mint API Twitter Bootstrap cPanel Plesk Authorize.net Stripe PayPal Google Checkout BASIC RackSpace API (OpenStack, OpenCloud, etc.) SalesForce / SalesForce API TinyMCE Yoast SEO MailGun / MailGun API JIRA Confluence

    $280.00 /hr
    3,460 hours
    4.90
  5. Goran D.

    Goran D.

    System administrator, Software developer, DevOps, DB Admin

    Macedonia - Last active: 1 day ago - Tests: 21 - Portfolio: 1

    Continuously upgrading my knowledge and experience on many IT fields. My major expert areas: Cloud computing : AWS, Rackspace, Hostgator. Auto scaling, Optimizing, Minimizing costs, Monitoring Operating Systems : All Windows and Linux operating systems. TCP/IP networking, advanced routing, firewall, vpn, iptables... Development : Java, C#, Delphi, Shell scripts Databases: MySQL, PostrgeSQL, MsSQL, Oracle, MongoDB, Sqlite

    $26.00 /hr
    5,965 hours
    4.93
  6. Rajneesh Rana

    Rajneesh Rana Agency Contractor

    LAMP Server administrator, PHP, CakePHP, wordpress

    India - Last active: 2 days ago - Tests: 26 - Portfolio: 7

    Web development languages and platforms:- * PHP * Jquery * Javascript * CSS * HTML, XHTML * Wordpress * Cakephp * php and asp.net CMS * Custom CMS Major areas of expertise: * Microsoft Windows Servers * Linux servers - CentOS , Ubuntu , Debian * Apache, nginx, IIS * DNS servers * FTP Servers * Mail servers * cPanel Hosting * Website Panel * WHM * Webmin / Virtualmin

    Groups: Bluehost Developers and Designers

    Associated with: Netgen IT Solutions Private Limited

    $16.67 /hr
    5,276 hours
    4.97
  7. Alfonso Valdes

    Alfonso Valdes

    Sr Linux / Amazon EC2 / Migrations / Nginx / Security / DevOps

    Mexico - Last active: 9 hours ago - Tests: 4 - Portfolio: 6

    A self-motivated System and Network security administrator with more than 10 years in the management and analysis of Linux/Unix enterprise Servers (60- 70 servers). With deep and advance knowledge of highly scalable servers, Cloud Computing, High performance, Hardening Servers, Migrations, Ethical hacking, Development Operations - DevOps, Open Source services and Server optimization. Certifications such as: Certified Ethical Hacker - Red Hat Certified Engineer - Cisco CCNA. Expertise in: MIGRATIONS: AMAZON/Wordpress/Magento/LAMP/Cpanel migration plans and implementation, backup-restore and recovery plans. I have helped dozens of clients migrate their web sites and applications into the CLOUD VPC. Design and build Web Servers with HIGH PERFORMANCE (LAMP, NGINX/python, Nginx/Varnish, Nginx/php-fpm, Jboss, Apache tomcat and Varnish) - Improve and Fix performance issues, service optimization, security issues and deployments. MALWARE removal and analysis: WordPress / Magento / Joomla Malware removal and remediation, Incident handling and Forensics analysis. BOOST and optimize websites with: NGINX, Varnish, REDIS, Amazon S3, Memcached, APC, apache tunning and mysql tunning, Amazon CloudFront and more. Amazon Cloud Computing (AWS) - AMAZON EC2, amazon CDN S3, amazon RDS, amazon ELB, Amazon AutoScaling, Amazon VPC, CloudFront, Route53, etc. Also Management of multiple Control panels like Rackspace Cloud Computing, SoftLayer, GoDaddy, HostGator, dreamhost and MediaTemple. DevOps and Continuous integration: Docker + vagrant, Vagrant + Puppet, Puppet + Git, Docker + Ansible. Continuous integration with Jenkins, travisCI, distelli and more... Designing and deploying scalable & Highly available systems such as: Amazon Load Balancing (ELB), Hearbeat, HAProxy, mysql cluster, apache cluster... Network and web security such as: Vulnerability Assessments, Hardening servers, security audits, Penetration testing, Virus/Malware/Threats/Vulnerabilities countermeasures, web security, fail2ban, Tripwire-AIDE-OSSEC, mod_security, mod_evasive, Denial of Services (DDOS) countermeasures, Firewalls (iptables, CSF and apf), etc. VPS: Cpanel / WHM / Plesk / DirectAdmin / Webadmin - Migrations, management, hardening, configuration, maintenance and high level of Administration. Databases Administration such as: Mysql tweaking and tunning, MongoDB, load balancing and Mysql replication (Master & Slave) for High traffic. Database: Mysql tweaking and tunning, MongoDB, ElasticSearch, Apache Solr, Sphinx, lucene, MariaDB, Postgresql replication & Pgpool, Mysql load balancing and Mysql replication (Master & Slave) for High traffic. Networking: TCP/IP high expertise, NAT, FIREWALLS, CISCO routing and switching and Packet analysis with tcpdump and wireshark. Storage solutions and Directory management: SAMBA, NFS, FTP and sftp. LVM and RAID*. SCRIPTING: Bash and python. Proficient with MAIL Servers: postfix, sendmail and Zimbra. Source control versioning: GIT and SVN. Deploying and maintaining Monitoring systems such as: nagios, ZAbbix, cacti and Jboss Operation Network (JON). Backups solutions: amanda, rsync, Amazon backups and rsnapshot. Research & development (R & D) for any open source service and technology.

    $24.99 /hr
    8,236 hours
    4.87
  8. Waqas Jamal Agency Contractor

    Wordpress Sensei

    Pakistan - Last active: 1 month ago - Tests: 1

    Fluent in the art of all things Wordpress... In depth knowledge of Wordpress development and design best practices gained due to considerable experience in working on complex wordpress projects on a continuous basis. Hands on experience in modifying and enhancing several popular Wordpress plugins. In depth knowledge of front end development and wordpress theming frameworks. Last but not least considerable attention to detail coupled with strong communication skills.

    Associated with: Mindblaze Technologies Agency

    $30.00 /hr
    1,939 hours
    5.00
  9. Vu T.

    Vu T. Agency Contractor

    Senior Java Developer -JOSSO - OpenLdap

    Vietnam - Last active: 3 months ago - Tests: 6 - Portfolio: 5

    More than ten years of experience in software development. Has good knowledge of Databases and Object-Oriented Analysis and Designs. More than 7 years working with SQL Server, 6 years working with java, 4 years with J2EE, 2.5 years working with Oracle as an analyst and system developer, 2 years with .NET application, 2.5 years with .NET web-base, 4 years working with PHP on sugarCRM system and CakePHP and Yii frameworks.

    Groups: Bluehost Developers and Designers

    Associated with: Online Business Solutions

    $24.44 /hr
    6,276 hours
    4.31
  10. Bimal Poudel

    Bimal Poudel Agency Contractor

    MySQL,Smarty,PHP,MVC,Ajax,JS,CSS - for Advanced Internet Applications

    United Arab Emirates - Last active: 3 months ago - Tests: 14 - Portfolio: 10

    To build challenging business applications. All my works confirms industrial strength and standards. I follow consistent design pattern and simplify tasks before coding them. Most of my skills and performances are on backend development. Platform: MySQL (Modeling, ER Diagrams, Optimization and Report Generation), Smarty Templating, PHP Scripting, and Object Oriented MCV architecture, Regular Expressions, Apache on Linux Server, few CSS/design works are the ideals. I lead and produce scalable projects - with future extensibility in the mind. I focus on website safety, optimized load time, debugging, cleaner source code. Most of the times, I am interested in developing new/unique websites that generates business for your organization. For full list of my skills set and past projects; please refer to: http://bimal.org.np/

    Associated with: CrossOver Web Solution

    $19.00 /hr
    1,062 hours
    4.38