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Last updated: October 1, 2015
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alexander Merkulov

alexander Merkulov Agency Contractor

Asterisk/voip/a2billing/freepbx/kamailio expert

Ukraine - Tests: 6 - Portfolio: 5

My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I not like to do something that not need be done, i prefer use developed components and solutions. That not mean i can't do development. I working with different programing tasks for last 26 years. yes, from 6 y.o. I live in it. So i prefer do something new&interesting; I can handle all tasks from linux administration/virtualization upto end-user web for voip. Only task i never do - graphical design part. That is not my field, better hire someone else for design. I have university degree, working with asterisk from start of this project. Have developing experience with freepbx/trixbox&a2billing. I am one of contributor of trunk. Also i can work as mysql/postgres DBA, database architect, has experience with following languages: Perl Python PHP C/C++ Javascript SQL Prolog/Lisp,Forth. In voip i can work with callweaver, asterisk, opensips, kamailio. Developed modules for freepbx, elastix, trixbox, a2billing.

Associated with: UA Prime Agency

92% Job Success
$67.77 /hr
546 hours

Fernando R.

Fernando R.

Ruby on Rails Developer with Strong Linux Background

United States - Tests: 3 - Portfolio: 1

Very proficient RoR Web developer with a strong Linux/Unix background. Located in Florida, USA I work on EST timezone, allowed to work legally in the USA, I can attend to meetings, receive and make calls worldwide, as my customer you will be provided with a direct line to contact me if necessary. Over 11 years of experience on the IT industry, mainly working for major 500 Fortune US companies such as Cisco Systems, LexisNexis, Sun microsystems and others. My focus is always to keep things as simple as possible and make stuff better. Relevant skills : - Ruby on Rails 3 - , Credit card systems - RSpec , Capybara ( Testing ) TDD - Memcache - C ANSI - Linux / Unix (Solaris) - Shell scripting - Unix power tools: vi,awk,sed,bash,truss,top,strace,tcpdump,iptables.. - Capistrano - Amazon EC2 and Clouding computing. - VPS (Heroku, SliceHost, DreamHost) - Git Collaboration tools and extras that we offer to our customers : - US Phone number landline and cell phone - Skype. - Outlook Calendar (Exchange server) - EST U.S timezone, Located in Florida, near by major airport (FLL) - Fluent in English, Spanish and Portuguese (Spoken and Written) Don't hesitate to contact me if you have any questions.

$33.33 /hr
157 hours

Dmitry Gorlov

Dmitry Gorlov

Linux Admin / Oracle certified professional

Russia - Tests: 11 - Portfolio: 1

Under construction... I start my IT career since 1992 using FoxBase by IBM-compatible 286AT computer. Today my phone have more powerfull CPU :-) In Linux from 1997, begun from Redhat 6.0 In Oracle from 2003, begun from 8.1.7 10g OCP Certified in 2007. Microsoft MCP in 2007.

100% Job Success
$20.00 /hr
445 hours

Roman T.

Roman T.

System administrator/Web optimizator

Russia - Tests: 6 - Portfolio: 1

Project management, magento development, magento speed optimization, mysql optimization, cacti, nginx, zabbix, openvpn, bgp, centos, debian, ubuntu, windows server 2003-2008-2012, MSSQL server, iis, asp, aws, amazon ec2, red5 installator, proxmox, mongodb, virtualization, proxmox, xenserver, openx, highload projects.

92% Job Success
$88.89 /hr
1,908 hours

Sergey P.

Sergey P.

VoIP and Linux Engineer

Russia - Tests: 5

OS: linux (gentoo, debian, centos ...), FreeBSD over 10 years using/administration Lang: perl, lua, shell (java, ruby, erlang studying) VoIP: asterisk, freeswitch, gnugk, kamailio/ser (over 7 year administration) PBX: Si2000 (v.5), Definity administration (SS7, ISDN) DB: mysql, postgresql Sec: DMVPN, IPsec, OpenVPN Publish: LaTeX

100% Job Success
$30.00 /hr
76 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

Denis Ilijevic


Croatia - Tests: 7

I'm interested in new technologies, computer networks, computer security, operating systems and project management. For the last year I have been working with Microsoft and Oracle databases. Beside their procedural languages I learned how to use XQuery and XPath for querying XML documents in both databases. I have experience with BIND DNS and ISC DHCP and network administration, computer security and with Unix/Linux/Window operating systems.. Before accepting any job I will do a detail interview because that's the best way to find out if I can do a job. I guarantee for my work, before any payment I like to show what I did and answer any question you ask me. If my client isn't satisfied with with my work than I won't ask for any money but I will ask where I did wrong. My moto: satisfied client = happy client

$5.00 /hr
152 hours

Marc Gray

PHP/JS/HTML5 Expert Developer and Linux Administrator

United Kingdom - Tests: 12 - Portfolio: 1

I am an expert developer and system administrator with PHP, MySQL, Javascript, CSS3, HTML5 and Linux (I currently use: RHEL, CentOS, openSUSE, Fedora. I have previously used Gentoo and Ubuntu). I have previously developed/configured: - Full eCommerce framework with innovative admin panel (PHP, Javascript) - Automated video transcoding service (PHP, Linux, ffmpeg) - Automated document conversion service (PHP, Linux) - Database driven SFTP service and firewall stored over NFS (PHP, Linux) - Differencing document storage solution (PHP) - Deduplicating backup storage solution (PHP) - Multiple fault tolerant storage servers with 12tb of space (Linux) - Multiple complex scripted firewall setups using iptables (Linux) - Flash website without Flash, with pixel perfect design and advanced effects (Javascript) - MIME Email framework to replace PHPMailer (PHP) - ... and much, much more I also work as a white-hat hacker, where I probe and test servers for vulnerabilities. I have previously been CRB checked and treat all clients with confidentiality. I am happy to sign an NDA.

100% Job Success
$35.00 /hr
241 hours

Rahul Sharma

Rahul Sharma Agency Contractor

WebMaster Admin | Linux | CentOS | RHCE | AWS-EC2

India - Tests: 5

This is Rahul Sharma from Picnframes Technologies. 5+ years experience in Network administration, Database Management, Linux Programming and Networking, CentOS Expert. CERTIFICATIONS:- RHCE, CCNA, MCP MCP ID#6462262 Certified in 2008 RHCE Traine in 2009 CCNA ID#CSCO12251194 Certified in 2012 RedHat certification ID #140-040-692 Certified in EX300 & EX200 in 2014 Configure Cloud Server: Citrix server, ESXi Server 4.0, AWS-EC2, AWS-S3 Migrate Linux Hosting Server Linux Expert- Ubuntu, Mint


$20.00 /hr
4 hours