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. Anatolii R.

    Anatolii R.

    node.js (ex. php) backend webdeveloper

    Russia - Last active: 3 days ago - Tests: 7 - Portfolio: 10

    I'm one of the 3% most active JavaScript users on github - see first link in my portfolio. I have passed nodejs test among 10% most skilled nodejs developers - https://www.odesk.com/exams/_10426641 I mainly develop scalable RESTfull NodeJS servers for native mobile or single page applications or phantomjs based webscrappers trying to keep them simple and fast. I'm proficient with MySQL,PostgreSQL, AmazonRDS, MongoDB, Redis as databases, and can use most suitable one for your project. I can be your devops for tasks of deploying nodejs applications on Centos 7 VPS/VDS servers, Amazon EC2 or Heroku Cloud Application Platform. In my work i use git,mercurial and SVN version control systems, for every job i create a private repo at bitbucket.org for (me and customer only) for feedback, bug reports and support. I have a strong background as php/zend/symfony 1.4 developer and linux user since 2002 year. My work hours is 5 PM to midnight - Moscow time.

    $33.00 /hr
    1,060 hours
    4.20
  2. Alfonso Valdes

    Alfonso Valdes

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

    Mexico - Last active: 2 days 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
    8,193 hours
    4.87
  3. Mizanur R.

    Mizanur R.

    Magento, Volusion, Prestashop, Opencart, Amazon, eBay Developer

    Bangladesh - Last active: 1 day ago - Tests: 11 - Portfolio: 5

    Over the last 6 years, I have developed a wide range of websites using HTML & CSS, Java Script, PHP & MYSQL, CMS, , eCommerce, Joomla, Mambo, Shopping Carts , Zen Cart, Oscommerce, Magento, Opencart, Interspire Shopping Cart, Prestashop, Clipshare, Video Sharing Script, CRM, Boonex Dolphin, Social Engine, PHPFOX, vBulletin, Wordpress, Phpbb etc. including sites for start up companies and small businesses. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. There are also a wide range of experience in Develop any kinds of website also specially eCommerce portal, Payment gateway integration. Troubleshooting any website problem and server related issue. Linux web server setup, management, maintained, migration, troubleshooting etc. Domain, Hosting maintained migration, Name server setup, Transfer etc. Office Network technical support and management network access. Setup implement and Maintains, auto predictive dialer for call center software Call list upload, Make dial plan for inbound and outbound calling, Make call speed per second, minutes, hours and any kinds troubleshooting. I also have some lots of experience include in the following areas too: SQL, Ajax, OOP, and software design and testing, Asterisk, Call Center, Call Center Configuration, CentOS, CMS, cPanel Server, CSS, E-Commerce, Elastix, Elastix Dialer, FFmpeg Server, Flash Media Server, GoAutoDial, Java, Javascript, Joomla, JSP, Linux, Magento, Marketing, Multimedia, MySQL, osCommerce, Perl_CGI, PHP, Plesk Server, Predictive Dialer, Programming, Red5 Media Server, Tomcat Server, Script Installation, Search Engine Optimization, Server Administration, Social Networking, System Administration, VicidialNOW, Visual Basic, VoIP, Website Design, WHMCS, Wordpress, Zen Cart, Open Cart,CRM.

    Groups: Bluehost Developers and Designers

    $11.11 /hr
    2,339 hours
    4.66
  4. David B.

    PHP/MySQL Developer Specializing in E-Commerce Platforms

    United States - Last active: 2 days ago - Tests: 7

    Over the last 9 years, I have specialized in e-commerce. I got my start working on simple osCommerce installations. Since then, I have progressed to building and working with highly-customized and integrated platforms, becoming an expert in PHP/MySQL, HTACCESS, JavaScript, AJAX, jQuery, and XML. I have also had the opportunity to work extensively with many other frameworks and API's. I have a lot of experience with Google Adwords API, credit card and shipping interfaces, and numerous other external libraries. I enjoy challenge of optimizing applications for peak performance inventing new methods for automation, streamlining back-end operations, and providing custom analytics. I pride myself on being able to jump into a project quickly and to creatively solve nagging problems. Although I do have experience with HTML and CSS, I am in no way a designer. I am strictly a coder, and, simply put, I love my work. I have worked with over 140 clients on 225+ projects. Excellent communication skills and driven work ethic. I am a perfectionist, and I am not happy until the client is happy.

    Groups: Application Developers Alliance

    $72.22 /hr
    3,239 hours
    3.91
  5. Evgeny K.

    .NET Team Lead

    Russia - Last active: 5 days ago - Tests: 3

    Over 3 years of overall experience in IT field, analysing, designing and developing C# \ .NET based enterprise applications. Expert level knowledge of C# \ .NET. Excellent OO development skills, taked part in large projects, also in small and average projects too. Have architecting and designing experience, especially when working on project alone or with a small group. Experience in full development life cycle through OO Analysis/Design (sometimes used UML), to implementation, testing and deployment. Management and coordination activities of employees (have experience of leading 2-4 developer's team). Have a good experience of working with big (20+ developers, as developer) or small (1-5 developer's, as lead developer, architect) teams. Have a good experience of remote working and communicating. Programming languages and technologies: Visual Studio 2005/2008/2010, C#, .NET Framework 2.0+ (including WinForms, ASP.NET, WCF, Silverlight\WPF, LINQ, ADO.NET, Entity Framework), Web Services development (common and WCF services), WinAPI (+ P\Invoke), HTML, Javascript (+ jQuery), AJAX, CSS, T-SQL, MS SQL Server, XML (+ XSD, XSLT transformations), creating installers using WIX or standard Visual Studio install project. Microsoft Sharepoint development: Microsoft Office Sharepoint Designer, Microsoft Office Sharepoint Server (managing, administration, development), development: Web Services, Web Parts, Features, Jobs, Pages, Forms, Solutions etc.). Experience both with 2007 and 2010 versions. P.S: very interested in Haskell and Erlang projects.

    Groups: Application Developers Alliance, Coding Champs...

    $30.00 /hr
    5,407 hours
    5.00
  6. Dzmitry P.

    Dzmitry P.

    Automation: data mining and processing. Back-end: dev and integration

    Russia - Last active: 04/16/2012 - Tests: 5 - Portfolio: 6

    I do not re-invent the wheel. I try to build products which one forgets about: working flawlessly in various circumstances and heavy load without generating problems.

    $140.00 /hr
    2,183 hours
    4.94
  7. Ahmad Hamad

    Ahmad Hamad Agency Contractor

    System Administrator/Scripts Write/Cloud Expert/Security Consultant

    Palestinian Territories - Last active: 6 days ago - Tests: 6 - Portfolio: 2

    Hi there, I am a 32 years certified System Administrator/Programmer/Developer/Project Manager you wish getting help from : I am an LPI(101 & 102),RHCE certified, Automation king and Mobile/Desktop/Web Developer!! I have rich experiences in a wide range of software and systems over the last 15 years, the most notable skills are : 1-Linux System Administartion : I have installed, configured, repaired, and managed so many Linux systems (more than I can remember) since 2006. I started with Fedora, then centos and ubuntu. 2- Scripting (My Favorite!) : I do enjoy very much with scripting especially for automation purposes, and I am very experinced with it, on both linux (bash) and windows (autoit - batch). I can automate all the tasks even those that don't talk to the command line in windows. I made for example in past, a fully unattended Windows installation CDs that is fully customized to include all the software my customers need without asking single question ! and on Linux I use Bash scripting Language to handle almost every aspect of linux and I did wrote so many scripts for various tasks. 3- Hosting Services : I have installed and managed previously many control panels for hosting and administration, that includes Cpanel, Plesk, ISPconfig, Webmin, Usermin, AWS, DigitalOcean, rackspace, cloud providers and more ! and in addition to that I can run the hosting services directly myself with no need for a control panel. I managed standalone software like : Apache, MySQL Server, ws-ftpd, proftpd, lighttpd with fast cgi, thttpd, dovecot, postfix and other servers ! I can also build/manage any hosting services, including shared hosting, VPS and dedicated servers. 4- VPN Services: I have installed and configured many servers that provided VPN services, including PPTP and OpenVPN services. I have even created a custom control panel for the customers and link it with automation scripts I wrote to better help the client managing his customers. (see the following picture): http://img687.imageshack.us/i/screenshotrsl.png/ And besides I am the solo developer of vpnplatform (vpnplatform.org/team) ;) and my clients consider me the best VPN guy on odesk. 5- Figting Malware: I can get your windows box clean even from the hidden malware and spyware trojans. I can secure your box and keep it safe and protected. I have fought malware since 2001 achieving great results like : cleaning big networks from viruses and worms and keeping it up and running in hostile environments for months with almost no downtime ! Also, I've built an app I called (Automated Malware Wizard), that would backup clinets hard drives and then GUARANTEE the cleaning of them, then update their software to close any possible vulnarables. I can customize it to you to fit your needs (If you intend to run a malware-cleaning and maintainance firm/utility). 6-Networking : I've been an ISP CEO before, and delivered internet services for more than 200 local subscriber when I worked at Hamad ISP. 7- VOIP: I am familiar with Asterisk and Asterisk GUI Installations, from scratch to fully working installation ! 8-Virtualizaion : I am very good with VMware and VirtualBox, I used them for years as a combination with hosting services. 9-Managing Mailing lists : I can manage your Email lists and make it away from SPAM lists by playing fair and square, I managed lists before, some of them got thousands of subscribers, I can clean the list also of all invalid/outdated subscribes by catching all email bounces using (my experience was with phplist script). 10- Web Development using PHP/MySQL : I can develop web pages using a mixture of several technologies including html/css/php/mysql/javascript, and I've been using this skill more and more recently. 11- I have Oracle Databases, android and Java programming experience. And Finally, I can perfectly read, write and talk English Language and you can contact me over email, sms or mobile ! I perfectly speak English Language. I am ready to move to your job location if needed. I respect my work and give it every effort I can while keeping job's secrets secured and not to be shared with any 3rd party. You may see my odesk profile at: https://www.odesk.com/users/~~9b6150fc1d75d477 Note: I can adjust my availability time to suite your needs. Best wishes Ahmad

    Associated with: Palmtree Geeks, Hamad IT Agency, Holol Agency

    $20.00 /hr
    1,120 hours
    4.97
  8. Ankur M.

    Ankur M. Agency Contractor

    PHP,CMS,HTML5,RETS,iOS,Android,eCommerce,phRETS,MLS,node.js,AngularJS

    India - Last active: 2 days ago - Tests: 9 - Portfolio: 25

    Expert Web Developer with strong experience in Web 2.0, PHP5, Wordpress, Joomla, Drupal, MySQL, HTML5, RETS/IDX, Real Estate, Mobile Apps, iOS, Android, Responsive Design, node.js and AngularJS. CRM Consultant. Expert in Real Time updates, Betting, Odds, Betting Sites, Forex Sites, Trading Sites. Online Marketing Consultant with strong SEO, SEM, PPC, SMO, SMM, Google Adwords & Google Analytics skills. RETS MLS Listing Integration. Server administration over cPanel, Plesk & SSH.

    Groups: Bluehost Developers and Designers, concrete5...

    Associated with: Matrix Marketers Agency

    $22.22 /hr
    3,269 hours
    4.62
  9. Ahmad Samir

    Ahmad Samir Agency Contractor

    Cpanel/WHM/Linux Administrator/Firewall/security/Centos/Ubuntu/WP

    Egypt - Last active: 3 days ago - Tests: 7 - Portfolio: 2

    I possess 5+ years of experience in Linux server administration including installing & upgrading Apache,php,mysql and various types of open-source software also compiling and upgrading & installing kernels patches. Also I've good knowledge in installing & configuring virtual server management software ( proxmox, openvz, Ganeti). Got my B.Sc. in computer engineering and operational research, with a graduation project grade “Excellent A+” in image processing. As well as, I have managed to successfully earn a software diploma in network security , web crawling and software engineering with grade “Very Good A-”. If I can provide you with any further information on my background and qualifications, please let me know. Please note that : I do not accept any jobs related to wine/gambling/adult/.

    Associated with: EGY-TECH Agency

    $16.67 /hr
    2,210 hours
    4.90
  10. Heshantha Fernando

    Heshantha Fernando Agency Contractor

    Network Engineer, Security Specialist, System Admin and DB Admin

    Sri Lanka - Last active: 20 days ago - Tests: 15

    I have over 12 years of experience. Always with 'Can Do' attitude. When it comes to my expert areas of IT, I'm capable of accomplishing anything. I'm also a fast learner. Network Engineer: -Experience on Configuring, Troubleshooting and Optimizing Routers, Switches (L2/L3), ASA Devices, Load Balancers, PIX Firewalls etc. etc. With following certifications (CCNP R&S, CCNP Security) Security Specialist: -I have done a lot of projects as a Security Consultant. Having experience in conducting Vulnerability Assessments, Penetration Testing and also I have done Server/ Network Hardening against threats, Designing, Implementation and Maintenance of security policies, Conducting Forensic Investigations etc. etc. I'm having Certified Ethical Hacker (C|EH), Computer Hacking Forensic Investigator (C|HFI) and EC-Council Certified Security Analyst (E|CSA) Certifications Proficient in ISO 27001:2013 security audits and Certified Lead Implementer for ISO 27001:2013 System Administrator: - Windows Administration experience of mine goes back to Windows NT 4. Since then I have been Implementing, Administrating & Troubleshooting Windows Servers. - I have experience in HP-UX, Red Hat RHEL5/6 CentOS5/6 administration. Database Administration: - Implementing, Administrating & Troubleshooting Microsoft SQL Server 2008/2012. I have started DBA tasks back in SQL server 6.5 days. - Experience on DBA tasks on Oracle 8i, 9i, 10g and 11g. - Experience on DBA tasks on MySQL 5.0/5.5. IT Disaster Recovery: Have experience in identifying vulnerabilities and taking appropriate countermeasures to prevent and mitigate failure risks. Including taking enterprise-wide approach to develop disaster recovery plan, assessment of risks, developing policies and procedures, implementation the plan and recover from a disaster. I'm a EC-Council Disaster Recovery Professional (E|DRP)

    Associated with: Intek Services, Intek Services

    $25.00 /hr
    12,825 hours
    4.97