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Load Balancing Upwork freelancers typically receive a client rating of 4.98.

Last updated: October 1, 2015

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Sergey Kogut

Sergey Kogut

Sr Windows and Linux Systems Admininstrator

Ukraine - Tests: 1

Hello, I'm a System Administrator with 11+ years experience. I have worked earlier with hosting companies like,,, and I've great experience with WordPress, cPanel/WHM, Plesk and server configuration (Bind, Postfix, Apache, MySQL, FTP and etc) + Virtualization OpenVZ Also I know CentOS and Ubuntu rather good (installation and configuration of software like ffmpeg, 3dproxy, Maldet, OpenVPN, Bugzilla and etc) Also I've a good experience with Nginx + PHP-FPM + Nginx Cache + Varnish Cache Currently I work remotely as a system/server administrator at RipaMedia Inc. I love my job and also I like to help people like you :)

Groups: Bluehost Developers and Designers

98% Job Success
$22.22 /hr
248 hours

Martin L.

Martin L.


Bulgaria - Tests: 8 - Portfolio: 5

Over the last eight years I have been involved in the development of web (Internet and Intranet) projects using PHP and part of my work in the last four years was to maintenance high available SQL and noSQL databases - to architect and optimize their structures and queries. Also I'm server administrator with 6+ experience with Linux ( Slackware 6-13, CentOS 4/5/6/7, Fedora, RedHat, Ubuntu, Debian). My skills include, but are not limited to configuring of network and firewalls, web servers (nginx/lighttpd/apache), databases (MySQL and MySQL Cluster, MariaDB, Percona, MongoDB full shareded and replicated clusters, Redis, Memcache and MemcacheDB clusters), message queue servers (RabbitMQ clusters and MemcacheQ), Elasticsearch, Haproxy, GlusterFS Clusters, NodeJS apps, KeepAlive HA clusters. DevOps experience with CoreOS, Google Cloud Compute, Amazon, Docker, Puppet and Ansible.

70% Job Success
$44.44 /hr
2 hours

Robert C.

Robert C.

TIBCO Consultant & E-Commerce Architect

United States - Tests: 2 - Portfolio: 2

Good Day and thank you for taking a moment to read my profile! I started working in IT about four years ago as a technical support representative for Simple Helix, a Magento specialist web hosting company. From there, I had the opportunity to spend a year as a Network Analyst for a local, carrier class, ISP before moving on to a position as a Linux Systems Engineer with a Magento development firm. In the present, I work as an Applications Engineer with a focus on the TIBCO stack, most notably AMX, BusinessWorks, EMS, and SilverFabric. I have a very strong background in Linux/Unix administration and have worked extensively with CentOS, Red Hat, and Debian. I've worked with networks from a physical perspective, as a NOC Technican, as well as logical perspective troubleshooting complex application issues. Over the past few months I've taken the opportunity to learn to code in Java and I've recently attended Red Hat training for JBoss EAP 6. I'm a CPTE (Certified Penetration Testing Engineer) and would happily pursue projects as an E-Commerce Architect, Systems Engineer, TIBCO Engineer, JBoss Administrator, entry-level Programmer, or entry-level Ethical Hacker. I am available for new jobs immediately outside of US business hours.

97% Job Success
$33.33 /hr
474 hours

Daniel Z.

Daniel Z.

Highly skilled API integrator, PHP (ZF) Coder and Project Manager

Poland - Tests: 7 - Portfolio: 6

Goal: Project and develop high quality apps for your success. Profile: OOPHP & Zend coding, IT consulting and business analyst, project coordinator and manager, Other skills: Apache, Bind, SSH, bashscripting, Memcached, Github, Solaris, Oracle, MySQL, Radius, AD, expert knowlegde of many *ux and windows systems Advantage: Project and implementation of many web apps. Most of it projected and developed by myself using Zend Framework, Google API (youtube, gdata), social API (twitter, facebook). Some of it integrated with operating systems or AAA software (radius, ldap). Usually Design Patterns were used (like Template Method, Version of Control, DAO, Dependency Injection, Decorator and so on). Some application built upon a structure of web services (XML, REST, JSON), some using jQuery and AJAX. Tools and technologies: Apache, radius, bind, ldap, Zend Framework, XML, SOAP, Linux, Linux daemons, Memcached, Sockets, REST, JSON, Oracle, MSSQL, MySQL, Design patterns, MVC, SVN, BASH, PHPUnit, Xdebug, Unit testing, Google Youtube API, Google Gdata API, Google Maps API, Facebook API, PayU API

100% Job Success
$35.00 /hr
1,925 hours

Jonas M.

Jonas M.

Cloud Systems Architect, Amazon AWS expert, Linux Admin

Lithuania - Tests: 6

I'm experienced DevOps guy, Linux Server Administrator (over 9 years) , Cloud based solutions engineer (mostly on Amazon AWS) My experience: Linux based servers solutions SaltStack Infrastructure Automation and Cloud Orchestration Continuous Integration with Jenkins Vagrant, Docker for devs Amazon AWS cloud solutions Migrations to Amazon AWS platform Linux servers setup: Ubuntu, CentOS, RedHat System tasks: administration, configuration, backup solutions, audit, optimization, benchmarking Amazon AWS - running projects on EC2, RDS, VPC, SimpleDB, S3, CloudFront, Route 53 dns, ELB, AutoScaling, CloudWatch, ElastiCache, IAM, SES, SNS services. VPS: Cpanel / WHM / Plesk / DirectAdmin / Webadmin - Migrations, management, hardening, configuration, security maintenance. Backup solutions for AWS, Linux servers VMware (VCP certified) - vSphere ESX servers, vCenter servers, VMware View infrastructure administrator Websites projects running on nginx, apache, mysql, LAMP stack Experience with HPC clusters, HPC management software for Linux systems including multiple Linux operating systems, linking and building libraries Development, testing, stageing environments installation,preparation for production/developement process (svn, git, jenkins, bash scripts, phing) SaltStack, Puppet, Vagrant, Docker Experience with scripting language such as PHP, JS, Bash-Scripting, NodeJS Cloud SaaS services: goolge apps, owncloud Atlassian software installation, setup (jira, confluence) Wordpress, Drupal installations

91% Job Success
$50.00 /hr
117 hours

Aleksandre Vardanidze

Aleksandre Vardanidze

--admin systems|database|network|security

Georgia - Tests: 6

--Admin systems Extensive experience with the configuration, hardening, and maintenance of various Linux distributions, including: * Red Hat Enterprise Linux, Fedora, CentOS * Debian, Ubuntu * OpenSuse Able to set up vital Linux infrastructure components including load balancers, DNS servers, proxy, web/application servers, and mail servers. Familiar with os-level security policies as well as server-level security layers like SELinux. --Admin database Skilled in MySQL database administration for standalone servers as well as replicated and clustered environments. I have also worked with postgsql --Admin Network I've been working as a network administrator for 5 years. For now I'm working in a governmental agency as a network administrator and network security specialist. Have experience with almost every cisco and hp network devices, also I design governmental network and our agency network design. I'm certified ccna,ccnp and ccna sec. had trainings in ccnp sec, ccdp, gsec, CEH,ENSA and Microsoft products (server 2003/8, exchange server and etc) Monitoring and diagnosing faults of VPN connections with other organization, Data Exchange Agency IPS/IDS system and sensor setup, operation. Security concept, design, documentation and implementation. --Programming Native PHP & PHP framework: Phalcon Python (python frameworks: django, cherrypy, flask) C/C++, x86 assembly, x86 architecture (PE binary format, IDA & general RE) --Malware Analysis Static and Dynamic Analysis using a debugger and disassembler. Memory Forensic with Volatility Detect malware characteristics at the Windows API level (DLL injection, function hooking ”SSDT, IAT”, keylogging, communicating over HTTP, DNS.) --Admin other Here is the incomplete list of technologies and solutions I have used over my 5 years of experience. -Zabbix, Zenoss, Nagios, Munin and Cacti for monitoring purpose  -Configuration management - Puppet, SpaceWalk, Katello  -Web servers - Apache, Ngnix, Lighttpd  -Load Balancing with Haproxy and Barracuda Load Balancer  -Virtualization - Vmware ESXi --Computer Skills, Trainings and Certification Windows; Windows Server (2003/2008/2012); MS Office; Linux; MacOS ; Network Monitoring Tools; Certified Ethical Hacking ( CEH ) - Self-study Course Security Certified Network Specialist - Self-study Course EC-Council Network Security Administrator - Self-study Course Metasploit Framework Expert - Self-study Course CompTIA Security - Self-study Course HISTORY * SpeedLine - Aug 2010 to May 2012 - Linux Engineer, System Administrator * DATA EXCHANGE AGANCY - Jun 2012 to May 2014 -CERT SPECIALIST * Unipay - Jun 2014 to Present -Linux Enginner, Network Administrator

$33.33 /hr
17 hours

Stamatis Kekes

Stamatis Kekes

Senior system administrator and PHP - C - Perl developer

Greece - Tests: 11 - Portfolio: 2

Very skilled Unix system administrator, with lot of experience in Linux ( Centos, Redhat, Fedora, Ubuntu, Debian, Gentoo, Slackware ), Solaris, xBSD ( FreeBSD, OpenBSD), vpn ( openswan - ipsec, openvpn, l2tp, pptp ), clustering ( LInux Virtual Server, Linux HA, vrrp, Solaris Cluster ), cloud computing, load balancing ( f5, haproxy ), VoIP ( asterisk ), databases ( MySQL, PostgreSQL), LDAP, web services ( Apache, Nginx, varnish ), security ( penetration testing, firewall policy design ), control panels ( CPanel, Plesk, Virtualmin, Ensim ), Virtualization ( VMWare Virtual infrastructure - VSphere, amazon EC2 ). As for Developing I am very experienced in C, PHP, Perl, javascript, ajax and many more to list.

98% Job Success
$16.67 /hr
1,824 hours

abid shah

abid shah

AWS,Cloud, VOS , Asterisk,VoIP,Linux,BulkMail

Pakistan - Tests: 2 - Portfolio: 7

Over the last 9 years I've been working in web hosting industry and have a hand on experience of Linux/Unix system and A+ expertise in all Linux troubleshooting. I've expertise of Amazone, RackSpace, VMWare ESXi(4,5), XenServer, Load Balancer, WHM/Cpanel, Plesk, ISPcp, ISPConfig, DirectAdmin, VirtualMin, Apache, MySQL, Postfix, Dovecot, Exim, Squid, OpenVPN, OpenSSL, Hadoop, Hbase, Solr, Redis, FFmpeg, FFmpeg-php, SugarCRM, ViciDial, VtigerCRM, Shell Scripting, Perl Scripting, PHP, RoundCube, SquerrileMail, Enterprise level Hosting/Mail Servers like Zimbra for large scale Setup with full security features and System Backups. I also have VOIP expertise and following are my favorite Asterisk PBX, SS7 Signaling,IVR Systems, Dictation Systems.

76% Job Success
$16.67 /hr
430 hours