Network & System Administrators

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  1. Vladimir Zotov

    Vladimir Zotov

    Asterisk|Network|Linux|AWS administrator, PHP|JS|HTML developer

    Russia - Last active: 1 month ago - Tests: 4

    I work in different IT areas for 9 years. I have advanced skills in network administration, helpdesk consulting, web-development. As network administrator I've builded and supported: - ISP network (routing,switching, billing, asterisk, DNS, Web-servers, email) - large company network (routing,switching, DNS, AD, Web-servers, email) Also I have advanced skills in AWS-infrastructure administration: - Amazon EC2 - Amazon S3 - Amazon Route 53 - Amazon Kinesis - Amazon VPC As web-developer I've created and supported web-sites and services on: - Joomla - Drupal - Bitrix - Yii - Moodle. Also, I'm Certified Cisco Networking Academy and Linux Professionl Institute instructor.

    $8.00 /hr
    27 hours
    4.99
  2. Yuliyan Tsvetkov

    Yuliyan Tsvetkov

    Advanced linux administrator and system automator

    Bulgaria - Last active: 5 days ago - Tests: 6 - Portfolio: 1

    In the world of 24/7 available services, giving to the customer best stable and optimized Linux environment is the primary role of every System Administrator, my role too. I've 5 years of experience in automation, installation and maintenance of Linux servers based on RHEL, CentOS, Fedora, Debian and Slackware distributions. Also I'm managing a lot of live servers for the biggest Telcos in the Middle east and Africa using new technologies, and also proven old ones.

    $22.22 /hr
    214 hours
    4.68
  3. Joshua C.

    Joshua C.

    Security-focused IT Admin & Developer

    United States - Last active: 8 days ago - Tests: 1

    I worked as senior software developer for a high-tech security corporation for 2 years (and still do consulting with them) and have been a developer for 6 years. I was responsible for their security audits and testing of their SaaS apps. I developed many cryptography-focused applications and wrote dozens of integration projects for cryptographic hardware tokens. I'm familiar, and up to date, with modern hash schemes (ie. SHA2, MD5), symmetric/block algorithms (ie. AES), and asymmetric algorithms (ie. RSA) and best practices. I practice secure programming in all of my projects and always follow best practices to ensure the final result is of the highest quality. I'm well-versed in PHP, HTML5, CSS, JavaScript (including jQuery, Angular, and Node), Bootstrap, PhoneGap / Cordova, WordPress, and ASP.NET. I also run a security-focused blog (https://joscor.com) and provide security audits for large state agencies in the area.

    $60.00 /hr
    62 hours
    5.00
  4. Asif Gohar

    Asif Gohar

    System, Network, Active Directory, Exchange, Backupexec, System Center

    Bahrain - Last active: 1 month ago - Tests: 5 - Portfolio: 5

    Knowledgeable and skilled IT professional with encompassing work experience spanning more than 8 years in systems administration with compliance as per industry standards. Possess excellent interpersonal skills to liaise amicably with diverse groups of people, different departments, vendors and agencies. With extensive exposure to different cultures and work environments and has worked effectively with multinational individuals and professionals from all organizational levels. Certifications: MCITP (Server 2008, Exchange 2010, Lync 2010) Expertise: Exchange 2007/2010, Active Directory 2003/2008, SCCM, SCOM, DPM, SCVMM, BackupExec,Enterprise Vault, WSUS, Lync, Server 2003/2008, ADRMS, SQL Server, SAN/NAS.

    Groups: Microsoft Certified Professionals

    $20.00 /hr
    270 hours
    4.95
  5. Andrew I.

    Andrew I.

    Filemaker Business Systems Developer

    United Kingdom - Last active: 1 day ago - Tests: 5 - Portfolio: 4

    Experienced IT consultant for over 15 years, moved into developing Filemaker solutions over 5 years ago. Experienced with Filemaker 10-13, in Pro, Pro Advanced, Go and Server, including Web Direct. Presently the managing director of a retail company with a number of sites, most of my development has been for my own business and personal needs. I have also recently started Freelancing in Filemaker via oDesk. Current open projects include - Full multi site "simple EPoS till system", reporting to a centrally hosted server for reporting to iPhone/iPad. This "easy to use, but complex in design" system allows for near real time checking of 3 cash registers in 3 different sites remotely via iPhone. All built on Filemaker technologies. - Over 2500 member database, tracking membership of over 200 "groups" and associated subscriptions. This database is shared online to ~20 users with differing access and usage requirements. This has involved separate development, layouts, scripts, for each role. The information in this database now spans back to 1994, when it was kept in a number of Paradox for DOS databases, one for each year. These were ported, via DBase and Excel into a "Filemaker conversion package" that manipulated the data into a single entity. - Work with an external Funeral company to assess requirements and formulate a design for various business needs. This is ongoing work. - A number of simpler systems to track cash take, banking, travel expenses, stocktaking, etc. Some of these are hosted for multi user input. I mainly try to develop Filemaker solutions to appear as fully fledged client applications, with complete control of the user experience. I hide the 'out of the box' Filemaker menu system, and have developed a number of equivalent controls to navigate records, perform finds, or display the records being shown. I very much believe in the Apple 'usability model'. The 'simple to use' EPoS system I have developed requires no documented staff training to use.

    $44.44 /hr
    423 hours
    5.00
  6. Monis Rizvi

    Monis Rizvi

    Experienced Remote Technical and Live Chat Support, Ticket Support.

    Pakistan - Last active: 3 days ago - Tests: 4

    With more than 2 years of experience in customer service and technical support via live chat and tickets, I'm confident in my ability to find an amiable solution to any challenge I may encounter. As a self-motivated and determined person, with a strong capacity for learning, I thrive in virtual work environments - taking on new challenging and multi-tasking with ease. I've worked hard to foster strong working relationships and if I don't immediately have an answer to a question, I definitely have the skills and resources to know where to find it. As a naturally empathetic person with a solutions oriented attitude, I am able to relate to customers; helping them to feel comfortable and understood, while finding the appropriate solution for all parties involved. I am known for my commitment, superior work ethics, attention to detail and excellence in customer care.

    Groups: Microsoft Certified Professionals

    $6.67 /hr
    2,600 hours
    4.95
  7. Geza Akocsi

    Geza Akocsi

    Windows system and network administration, web development

    Hungary - Last active: 12 days ago - Tests: 4 - Portfolio: 1

    In the last 3 years I'm working as consultant, developer and system administrator in introduction of document management projects based on ELO system. (<a href="<a href="http://www.odesk.com/leaving_odesk.php?ref=http%3A%2F%2Fwww.elo.com"";;;; target="_blank">http://www.odesk.com/leaving_odesk.php?ref=http%3A%2F%2Fwww.elo.com"</a>;;;;; title="You are about to go to a URL outside odesk.com"><a href="http://www.odesk.com/leaving_odesk.php?ref=http%3A%2F%2Fwww.elo.com";;;; title="You are about to go to a URL outside odesk.com">http://www.elo.com</a></a>)I have 15 years of experience in system management in small business area. (Windows based servers and workstations, network planning and management.)In last five years I have designed and developed some websites from scratch, including areas of e-commerce and web-based business management.I have a lot of practice in remote management and it is my new tendency in my support field.

    $11.11 /hr
    17 hours
    4.81
  8. Jagjeet Singh

    Jagjeet Singh

    Labtech, Kaseya, ConnectWise Consultant

    India - Last active: 11 days ago - Tests: 1

    Technically knowledgeable and service oriented IT professional experienced in providing solutions to customer and end-users with proven technical expertise is seeking for a rewarding, challenging and personal growth where I can best use my knowledge and experiences in implementing, managing and supporting the IT infrastructure and end-users. Specializing in designing, implementing and maintaining Enterprise IT platforms, TRT takes the stress, risk and complexity out of managing core IT systems. Maintain complete control over the environment we take accountability for keeping it running efficiently and securely.

    $22.22 /hr
    1,843 hours
    5.00
  9. Oleg K.

    Oleg K.

    Senior Dev: Perl/Catalyst/Moose/DBIC/NoSQL+AJAX/jQuery, shell+sysadmin

    Ukraine - Last active: 1 day ago - Tests: 19

    Seeking opportunities in Perl oriented (Catalyst DBIC preferred) application development, shell and perl scripting, and BSD/Linux administration projects - to build sites and setup servers for your business or pleasure.In my mind, LAMP more often reads as LASP - Linux, Apache, (any|no)SQL, Perl - of course, with Catalyst, Template Toolkit and DBIx::Class/KiokuDB in pair with some RCS (git is preferred, but subversion, mercurial and others also possible). And of course, all can be integrated with AJAX libraries such as jQuery, Prototype, MooTools and other to create Web2.0 apptications.Great knowledge of regular expressions (regexp). Have real experience with MySql, Postgres, Oracle, CouchDB, LDAP, also worked with CPanel, Plesk and Ensim. And of course, have experience with Apache, SMTP (exim, postfix, sendmail), IMAP/POP (Cyrus, UW, Dovecot), firewalls (bsd/ipfw and linux/iptables), Samba and misc ftp and proxy solutions.I can work well as alone and as a team member.

    $40.00 /hr
    8,740 hours
    4.84
  10. Daniel Yavorovich

    Daniel Yavorovich

    System Administrator

    Ukraine - Last active: 5 days ago - Portfolio: 1

    Operating Systems ● FreeBSD ● Linux Security ● iptables ● openssl ● jail ● clamav ● mod_security ● mod_clamav DNS ● Bind ● PowerDNS (+PostgreSQL / +MySQL) HTTP ● Apache ○ MPM: prefork, worker ○ mod_ssl, mod_php, mod_wsgi ● Nginx ○ Access control ○ Autoindex ○ Fast-CGI ○ uWSGI ○ Proxy ○ Cache ○ SSL ○ upload_progress_module ○ Control panel integration ■ Virtualmin ■ DirectAdmin ■ Plesk Proxy ● squid ○ basic auth ○ transparent proxy ○ cache ● 3proxy ○ http/socks ○ auth Raid ● Linux ○ md(0,1,5,6,10) ● FreeBSD ○ Gmirror / Striping File Systems: ● Ext 2,3,4 ● ReiserFS ● XFS ● OCFS2 ● ZFS (port to FreeBSD) ● CEPH CVS ● SVN ● Mercurial ● GIT ○ GitLab ○ GitoLite Backup ● rsync ● BackupPC ● Bacula FTP ● ProFTPd ● VSFTPD File sharing ● NFS ● SAMBA Control Panel ● Direct Admin ● Webmin+Virtualmin ● CPanel ● ISP-config ● Plesk Automatization ● Puppet ● Saltstack Monitoring ● Zabbix ● Nagios ● Munin ● Monit Network Understanding of theoretical and practical foundations of the networks (Data link, Network, Transport, Application Layers). VPN ● OpenVPN ● PPTP Database (SQL) ● MySQL (+MariaDB, +Percona) ● PostgreSQL Database (NoSQL) ● ElasticSearch ● Riak ● MongoDB ● Cassandra ● Redis Virtualization & Containerization ● KVM ● XEN ● OpenVZ ● LXC ● Docker ● Vagrant Cluster ● DRBD ○ master-slave ○ master-master (+ocfs2) ● Heartbeat ● Pacemaker Development ● actively use: ○ shell (bash, sh) ○ Python ● Frameworks ○ Django ○ Flask ○ Twisted ○ Tornado Cloud Solutions: ● AWS (EC2, S3, CloudFront, Route53) ● DigitalOcean ● RackSpace

    $33.33 /hr
    44 hours
    5.00