Linux Freelancers

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Devon Kurland

Devon Kurland

Linux System Administration Professional

United States - Tests: 3 - Portfolio: 1

With over 7 years of experience, I am prepared to tackle the most challenging requests in the wonderful realm of Linux and the web at large. I have experience not only with Linux, but also with Windows and Mac OS X. I also have a working knowledge of SQL, python, bash, and perl.

$50.00 /hr
2,914 hours

Diego Blanco

Diego Blanco

Linux Systems Administrator

Spain - Tests: 7 - Portfolio: 3

I'm an expert in GNU/Linux systems and other UNIX flavors. I have experience in CDN deployment, Cloud Computing, High Availability, Monitoring and Video Transcoding and Streaming. I've been working with GNU/Linux since I was 14, what makes more than 10 years of experience so I have a good background in its evolution, tools and administration. I also use to implement tools in shell script and python and I use to code my applications in python. In the last 6 years I've been working as systems administrator and Integrator for an IPTV company that offers streaming and web services. I directed projects regarding software distribution and upgrades automatization, product deployment architecture design and products monitorization. I co-designed and co-deployed the cloud computing platform for the company, its CDN with High Availability, its telephony system and other projects. I really like to learn new technologies, test its capabilities and see what can they do. I like to meet new people, work with them and share knowledge and opinions.

$33.33 /hr
734 hours

Igor S.

Igor S.

Linux sysadmin, cloud deployments specialist

Czech Republic - Tests: 9 - Portfolio: 1

I would like to offer you my deep knowledge of server 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. Unix only, Linux preferred. I am a developer of cloud monitoring & management tool M-Script, a simpler and easier to learn tool compared to alternatives, yet powerful and allowing faster cloud-based deployments including cross-cloud deployments, private clouds support, images management, cloud scripting of maintenance routines and any complex cloud automation (auto-scalability or any event/action programming). No matter how complex (or simple) your setup is, it can save you a lot of time and money and provide a seamless transition from initial proof-of-concept setup to full production infrastructure.

$40.00 /hr
7,572 hours

Mohamed El Sayed

Mohamed El Sayed

Senior Linux Engineer/DevOps Engineer

Egypt - Tests: 3 - Portfolio: 1

I worked as freelance systems administrator through out college years, and worked as an Operation Engineer for right after graduation. I was responsible for managing a Linux based cluster providing email, web and database services on top of a Xen based virtualized servers to's clients, based on various Open Source technologies and in-house developed solutions. I planned and executed a 0-down-time data center migration, managed a multi-server MySQL setups with complex replication and fail-over configuration and fully automated several internal complex operations. I also defined and implemented a new service monitoring and abuse/SPAM managment process for the company. I designed and implemented several scalable web and database infrastructure for Gawab outsourcing clients. My work involved working with several web and database load balancing technologies, monitoring, fail-over, backup and monitoring. And I wrote several automation and management scripts in Bash, python and PHP. I also have some experience with C and C++ and SQL. My technical interests include systems automation and management , cloud and virtualization technologies, scalable web and database architectures. I have years of experience working for Free/Open Source applications like: Apache, MySQL, PHP, Nginx, Nagios, Xen, postfix, qmail, iptables..etc.

$40.00 /hr
385 hours

Renan R.

Renan R.

Linux System Administrator / AWS / Network

United States - Tests: 3 - Portfolio: 1

I'm a self-motivated, reliable Linux System Administrator with strong work ethics. I have more than 6 years of experience, managing and analyzing hundreds of Linux servers. Certifications: • RHCSA: Red Hat Certified System Administrator • Linux+: Linux Certified Professional • Security+: Security Certified Professional Specialties • Linux Servers (CentOS, RedHat, Debian, Ubuntu); • VMware ESXi / vCenter; • Amazon AWS (VPC, ELB, EC2, S3, RDS CloudWatch, Auto Scaling); • Shell Scripting; • PHP/MySQL Programming; • MySQL Administration; • WHM/cPanel; • Server Migration; • Linux Maintenance/Troubleshooting; • Server Hardening; • Server Optimization/Tuning; • Highly Available/Scalable Servers • HAProxy Load Balancers • Web Servers (NGINX, Apache, IIS); • High Traffic Server Optimization; • Munin Monitoring; • Infrastructure Design and Implementation; • Colocation Management; • F5 BigIP Load Balancers, Cisco Switch, Juniper Firewall; • Providing Emergency Support (24x7) as needed • Server Pricing Negotiation (renting or buying); • Help with hiring developers and sysadmins; • Project management; • Team Player; • Languages (English, Portuguese and Spanish); and some more...

$65.00 /hr
433 hours

Anton T.

Anton T.

MODx Developer / PHP / MySQL / JS / Linux

Russia - Tests: 9 - Portfolio: 23

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], 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!

$34.44 /hr
1,281 hours

Ivan Ershov

Ivan Ershov

Cloud Architect/Engineer/Devops / Linux Admin

Russia - Tests: 11 - Portfolio: 2

Over the last 10 years, I have been working as technical support engineer/team leader/infrastructure architect for the different companies with on-premise/cloud hosting. My competency lies in planning, development, deployment and setup of the environments from scratch, troubleshooting/support/improvement of existing production systems based on Linux/Unix with the focus on automation and high availability. Have a lot of experience in automation/monitoring/backup of different distributed environments with LAMP stack and other applications, different clustering, scalability and high-availability techniques. Operating systems: Debian/Ubuntu, Redhat(Fedora, RHEL, Centos), Suse, AmazonLinux Level of skill with Unix/Linux: RHCE MailServers: qmail, postfix, sendmail etc Databases: Postgresql, Oracle, Mysql, noSQL databases (Mongodb, Cassandra, Couchbase, Redis etc) Clustering: RHCS, terracotta, heartbeat, pacemaker, distributed balanced setups Programming, scripting languages: Bash, PL/SQL, Ruby Clouds: AWS/Tata/RackSpace/CloudStack/Openstack/Azure Automation: Chef/Puppet, RightScale, AWS Opsworks,CloudFormation etc Continuous integration/deployment: Docker, Atlassian tools, Jenkins, SVN/Git, Codebase etc. Loadbalancers/proxies: Clouds LBs, Haproxy, mod_jk, Squid, Apache, Nginx Application servers: tomcat, jetty, jboss, Apache, Nginx, different PHP-based servers Monitoring: Nagios, Zabbix, Newrelic, OMD etc English: fluent Availability: up to 30hrs/week

$38.89 /hr
2,046 hours

Bogdan B.

Bogdan B.

Sr Linux System Admin (Nginx, Magento, Percona, Mongo, HHVM, MySQL)

United States - Tests: 2 - Portfolio: 5

- Linux maintenance/troubleshooting (RHEL, Centos, Debian), - Cloud hosting (Amazon EC2, AWS, S3, Digital Ocean), - Networking (dhcp, DNS:powerdns/bind/named, vpn: openvpn/pptp, firewalls: iptables/ipfw, qos, proxies), - LAMP/LNMP Stack - Mail servers (exim, postfix , antispam/ antivirus: clamav/spamassassin/amavis, courier, dovecot), - Bulk marketing (DKIM, SPF,DMARK,ADSP, high speed/inboxing, Interspire, PowerMTA), - Automation (puppet, shell scripting), - Automation Deployment (Capistrano) - Monitoring (nagios,Icinga, zabbix,Cacti,Graphite), - Magento Speedup, System Performance Optimization - Wordpress Performance Optimization - Mysql Perfomance Optimization, Replication - Full Disk Encryption / Remote Unlock /PXE unlock (Luks/DiskCryptor) - Load Balancer (haproxy)

$45.00 /hr
513 hours

Diego Woitasen

Diego Woitasen Agency Contractor

DevOps, OpenStack, Linux and Open Source

Argentina - Tests: 5 - Portfolio: 2

I’m an engineer focused on: DevOps Engineering OpenStack Linux and Open Source. I have more than 10 years of experience working with Linux and Open Source, providing solutions for small, medium and big companies. My specialties are: * Automation, Orchestration: Chef, Saltstack, Puppet. * Cloud and virtualization solutions: OpenStack, AWS, RackSpace, Digital Ocean. * Coding: Python, Ruby, C, C++, PHP, Perl * High Availability. * Load Balance. * Scalability. * Network services, I love challenges, new environments and help to my clients to make their life easier. Get more information about me here:

$55.56 /hr
1,684 hours

Oleg K.

Oleg K. Agency Contractor

Senior VoIP/Linux/Network Engineer (dCAP certified)

Russia - Tests: 6

I am a Senior VoIP/Linux/Network Engineer (dCAP, CCNA, ITIL certified). I do have experience and offer my services in these areas: VoIP: Asterisk, FreePBX, Elastix, A2billing VoIP Security & Tuning VoIP Integration Network Administration: Cisco, HP System Administration: Linux (expert), BSD*(proficient) Network Monitoring & Management: Zabbix, Cacti, NOC Mail services: Postfix, Exim, Dovecot, Cyrus, Spamassassin Virtualization: Qemu/KVM, OpenVZ, Proxmox High availability: VRRP, CARP, DRBD, GFS2, GlusterFS, cman, Pacemaker Common services: DNS, DHCP, File Sharing, NAT, iptables, ipfw Scripting: Bash, Python Web servers: Apache Database servers: MySQL, PostgreSQL Etc…

$36.00 /hr
330 hours