Linux Freelancers

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Dmitry Z.

Dmitry Z.

DevOps, Expert Linux Administrator

Serbia - Last active: 2 days ago - Tests: 8 - Portfolio: 3

I am a DevOps who has strong skills and pragmatic experience. Also I had extensive IT background as an expert Linux sysadmin for over 12 years. My knowledge of programming languages and systems administration allows me to integrate and automate much of my work. My GitHub account: https://github.com/freeminder Linux distros: RHEL, CentOS, Ubuntu, Debian Virtualization hypervizors and containers: KVM, VMware ESXi, oVirt, OpenVZ, LXC, Docker, DEIS, Kubernetes Cloud platforms and API: AWS, DigitalOcean, Softlayer, Rackspace, Linode Monitoring: Zabbix, Nagios/Icinga, Munin, Cacti, Monit Load balancers: HAProxy, Nginx Web servers: Apache, Nginx App servers: Phusion Passenger DB: MySQL, Percona XtraDB Cluster, PostgreSQL, Redis, MongoDB Mail servers: Postfix, Exim, Sendmail, Dovecot, Courier Control panels: cPanel/WHM, Parallels Plesk/Power Panel Configuration management and deployment: Chef, Capistrano Continuous Integration: Jenkins SCM: Git Scripting: Bash, Ruby, Python Frameworks: Ruby on Rails BDD: RSpec, Capybara

$44.44 /hr
820 hours
5.00
Alexander Shcheblikin

Alexander Shcheblikin

Linux, UNIX & AWS Expert Administrator

Ukraine - Last active: 29 days ago - Tests: 8 - Portfolio: 3

* 17 years in UNIX world * Security-minded * Administrator & Developer for complex projects involving automation, integration, data mining * Attentive to details * Ensuring reliable & secure systems operation and effective consulting & coaching * Protection against Spam & other unsolicited communications in email, web and VoIP * Building effective web-presence assets (5+ years in Web/SEO)

$40.00 /hr
89 hours
4.92
Pavel Zindyaev

Pavel Zindyaev

Linux Administrator / Windows Administrator / DevO...

Russia - Last active: 3 days ago - Tests: 8

Hi, I am Linux/Windows system administrator I have more than 10 years experience with things like: - Virtualization: VMWare ESX - Web Servers: Apache, Nginx - Database servers: MySQL, PostgreSQL - Optimization high-loaded web services based on Apache, Nginx, MySQL - Telephony: Asterisk, 3CX - Building High Availability systems: HA, drbd, haproxy, heartbeat - Network Administration: VPN, firewalls, building secure network architecture - Any kind of e-mail servers, DNS servers - Configuration management: Puppet, Chef - Windows Administration: Active Directory, MSSQL, Group Policies, Dynamics CRM - LDAP: OpenLDAP, ApacheDS - Continuous integration: maven, Jenkins/Hudson, TeamCity - Development: Java, Python

$33.33 /hr
262 hours
4.92
Igor S.

Igor S.

Linux sysadmin, cloud deployments specialist

Czech Republic - Last active: 1 day ago - Tests: 9 - Portfolio: 1

I would like to offer you my deep knowledge of servers hardware and software, which allows me to fine-tune servers according to their roles, and my ability to anticipate and solve problems in shortest time possible. No Windows please, Unices only, Linux preferrable. Lately my main point of interest has shifted to deploying and maintaining web projects in cloud environments. I am developing monitoring / management tool ( http://m-script.org ) and supporting existing installations, but I am very well familiar with all well known alternatives from both monitoring and cloud management side, so no problem to implement any of them. The point is, I know very well how it works. And how it doesn't, too :) I am interested in any system administration work, especially in cloud environments. The more challenging you setup is going to be, the better. Automated scalability, cross-clouds deployments, combination of traditional and dynamically scalable resources, DNS/Geo balancing - everything is possible, just let me know your needs.

$40.00 /hr
6,701 hours
4.88
Anton T.

Anton T.

MODx Developer / PHP / MySQL / JS / Linux

Russia - Last active: 1 day ago - Tests: 9 - Portfolio: 22

MODx Revo/Evo developer. Over the last 9 years of working in web developing industry. I have experienced as team working (including team leader position) as well as independent freelancer. Now scope of my professional interests range from light-weight web sites to highload portals and startups. In recent years I'm developing sites mostly based on MODx CMS/CMF, but i also worked with other frameworks: Zend Framework, osCommerce, UMI.CMS, Bitrix, WordPress, Joomla and about 3-5 self-made nameless CMS. Also I have strong expirience in integration of 3rd party applications, payment systems API (Card gateways, PayPal, SMS gateways, WebMoney, Yandex.Money, RBK.Money, Money[at]Mail.ru, Qiwi), websites optimization (according to GTmetrix and Google Page Speed Test). In addition, I possess high-quality 2 years expertise in software and web testing. At your service!

$33.33 /hr
1,250 hours
4.98
Nicu B.

Nicu B.

UNIX/Linux/BSD administrator 15+ years exp

Romania - Last active: 12 days ago - Tests: 3

I am an senior UNIX/Linux/BSD, hosting servers and DevOps administrator having over 15 years experience in these fields. One of your advantage and possible one of my defect is that everything I do, I do it like for me. I don't like patchworks. I will be the one who will care about your business more than other people and give you all advices and methods to have an organized environment and company workflow. My area of expertise covers all Linux distributions and all common unix software (but not only) like: LAMP (Apache, MySQL, PHP), mail services (postfix, exim, dovecot, horde, spamassassin etc.), TCP/IP, DNS, firewall, bash scripting, backup, high load configurations, security filters, control panels (Plesk, cPanel/WHM, Virtualmin, webmin), PowerMTA, JIRA, Stash, Confluence, Fisheye, Bamboo, WHMCS, SolusVM, AppLogic, AWS, EC2, Auto Scaling, Clustering, Replication etc. In my over 15 years of experience, I have worked with various operating systems and I have encountered many different situations (high loads, web attacks, spam, resource balancing etc.). I have strong experience in web services and programming (HTML, CSS, PHP, MySQL, JavaScript, Perl, ActionScript), web applications (Joomla, Open Realty, phpBB, Php Nuke, Wordpress, Gallery2, Drupal, OSCommerce, various CRM applications etc.) I have good experience with Adobe software (PhotoShop, Illustrator, Flash etc.) I also developed and designed many web pages and addons/modules/plugins for well known web applications like Joomla, Open Realty, Wordpress, Php Nuke, phpBB etc. I like to be the best in my areas of expertise and I do my best to achieve that.

$35.00 /hr
9,065 hours
5.00
Gabor N.

Gabor N.

Webdeveloper with significant Linux and database e...

Hungary - Last active: 12 days ago - Tests: 16 - Portfolio: 1

GitHub profile: https://github.com/Aigeruth Programming languages: Ruby, Python, PHP, Javascript, CoffeeScript, Java, C, C++, shell-scripting Linux: Debian, Ubuntu, CentOS, Fedora Linux shells: bash, zsh HTTP servers: Apache HTTPd, NGiNX, Databases: MySQL, PostgreSQL, Oracle DBMS, SQLite, Redis Configuration management tools: Opscode Chef Development Environment Builders: Vagrant, Docker Version Control Systems: Git, Mercurial, Subversion (SVN) Web frameworks: Ruby on Rails, Sinatra, Middleman, Jekyll, Django, Flask Javascript frameworks: JQuery, Prototype.js

$70.00 /hr
843 hours
5.00
Sergii Lysiuk

Sergii Lysiuk

Network Security VoIP Specialist - Cisco, Juniper,...

Ukraine - Last active: 4 days ago - Tests: 17

I am looking for projects that I can complete on a part-time basis. They can be either short term projects or long term projects. I can also provide ongoing consulting and administration if needed. I am experienced in Cisco Routing & Switching, MPLS, Security, Network infrastructure applications ( SNMP, Radius, DNS, DHCP , etc) Voip - including Asterisk, Call-Manager , Unity, FreePBX, Elastix. Server administration experience ( Linux, FreeBSD)

$38.89 /hr
381 hours
5.00
Vedran J.

Vedran J.

Linux Administrator, AWS, Nginx, Ubuntu, CentOS, E...

Croatia - Last active: 1 day ago - Tests: 9

8+ years of experience in: ** LAMP/LEMP(Nginx) administration and server hardening (Ubuntu, Debian, Centos,RHEL,HAProxy, Ruby/Thin deployment DevOps, Python/Django deployment DevOps,Nagios, fail2ban..) ** Amazon web services - AWS (EC2, VPC, RDS, S3, Route53, Cloudfront, Elastic Load Balancer, AutoScaleing, etc..) ** Nginx rewrites ** Google pagespeed ** Linux troubleshooting ** VPS providers: Linode, Rackspace, Amazon(AWS), MediaTemple, HostGator, Cloudflare, MaxCDN, CloudFront, NameCheap, GoDaddy, DigitalOcean, EC2, Bluehost ** Parallels Plesk ** Odoo/OpenERP installation ** VPS administration ** AWS EC2 administration ** VMware vSphere ** NewRelic ** fail2ban ** HAProxy ** keepalived, vrrp ** Nagios monitoring ** Elastic Load Balancer ** LINUX deployment and migration ** Rackspace Cloud Services ** Ruby on Rails app deployment ** Python - Djengo app deployment ** CPANEL, PLESK, WEBMIN, SHELL/SSH administration ** proftpd, pure-ftpd, pure ftp ** DNS, BIND, PowerDNS ** SSL certificates ** Site migration ** Network troubleshooting ** CSF firewall ** VPN ** Cisco, Mikrotik, Juniper Networks, Extreme Networks.. ** Linux PENTAHO deployment ** Squid, AiCache, AiScaler ** CVE-2014-0160 - OpenSSL Heartbleed patching. EXPERIENCE: Knowledge in Linux networking and service management, such as APACHE server, Nginx, LAMP, LEMP, LNMP, MYSQL, POSTGRESQL, tcpdump, haproxy, WIRESHARK, tshark, URL rewrite. Eight years of first hand experience in network and linux administration, support and Core Network design in Telecom environment. Excellent knowledge of various tasks such as: routing, BGP, VPN, Layer 3 networking(Routing), Layer 2 networking (LAN switching), VLAN, OSPF, RIP, network and packet troubleshooting. Working experience with various network equipment such as: Cisco, Juniper Networks, Extreme Networks, HP networking, MikroTik RouterOS, Ericsson OSS, Redback Networks and so on.. Experience with various providers such as: -AMAZON WEB SERVICES (AWS, EC2..) -RACKSPACE -HOSTGATOR -GoDaddy -MediaTemple -Cloudflare -NameCheap -LINODE -QuickWeb -HAProxy -etc.. -WHMCS RESELLER setup and migration on project or permanent basis. Including DNS, EMAIL, WORDPRESS migration -CPANEL, PLESK, WEBMIN, H-sphere, SHELL administration -SSL certificates Also available for packet and network congestion inspection. Having problems with BGP load balancing in multihome environment, need help or advice, contact me! :) Dedicated SERVICE MONITORING on own server with escalation on your own mail address

Groups: LoginRadius
$49.50 /hr
2,802 hours
4.92
Dmitry Sytchev

Dmitry Sytchev

Asterisk/Freeswitch/Kamalio expert, VoIP engineer,...

Russia - Last active: 5 days ago - Tests: 7 - Portfolio: 1

I have more than 10 years of experience in installation and support of carrier-grade VoIP services based on Asterisk, OpenSIPS, Kamailio, Freeswitch and proprietary SIP/VoIP software. My professional interests are Callcenters, automated dialer systems and integration of VoIP software with company information flows. You can rely on my strong engineering and programming skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analysis, security and fraud prevention. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco AS5300/5500, Audiocodes Mediant 2000, Quintum Tenor). I have experience in setup, administration and security of Asterisk, FreePBX, Elastix and FreeSWITCH PBX installations. As a programmer I use PHP, Javascript (both client-side using jQuery and Angular.js and server-side with node.js), Perl (system scripts/applications, Mojolicious webapps). I also have experience in development and administration of MySQL and Microsoft SQL Server databases. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security, including HA solutions (heartbeat/pacemaker). I use Zabbix and have some experience with Nagios and other monitoring software. I can also offer you consulting support in VoIP and network technologies.

$33.33 /hr
82 hours
4.96