IT & Networking Administrators

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  1. Joshua C.

    Joshua C.

    Security-focused IT Admin & Developer

    United States - Last active: 7 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
  2. 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
  3. Timur Birsh

    Timur Birsh

    Unix Systems Expert and Oracle DBA

    Kazakhstan - Last active: 24 days ago - Tests: 7

    Hello, Over the last 15 years, I am working with the following Unix systems: BSD based systems, Solaris and Linux distributions including Debian, RedHat Enterprise Linux, CentOS, Oracle Linux and Ubuntu. Over the past years I have developed a wide range of solutions: VPN, proxy, mail, web, file, Samba, DNS, DHCP, SSO, database, monitoring, backup, virtualization and high availability servers. I am Oracle DBA with the 5 years of experience. I work for financial institution. On my control a 21 databases. Mission critical and big databases runs on the IBM hardware and AIX operating system. Other databases runs under control of Solaris (SPARC) and Linux operating systems. For data protection we use Data Guard. One of the best products of the Oracle is Enterprise Manager Cloud Control. We use it for the databases and hosts monitoring. Its management repository contains a lot of information. It is very useful in building of custom applications (reports, etc). I have work experience with the following Oracle RDBMS versions: 8i/9i/10g/11g. I am big fan of a tasks automation. For small jobs I use shell scripts. For jobs that have complex logic I use Python or Perl. For complex text processing I use awk, sed and shell scripts as a glue. I have 5+ experience of C language programming for Unix. Hardware administration of the following vendors: Oracle (Sun), HP, Dell. I am contributor of the following free software projects: Debian (http://qa.debian.org/developer.php?login=taem@linukz.org), Transmission Bittorrent Client, inadyn Dyndns client. I maintain the following opensource programs: * sXid - http://linukz.org/sxid.shtml * cd-discid - http://linukz.org/cd-discid.shtml I use Git for source code management. I would be happy to help you. Please do not hesitate to contact me.

    $33.33 /hr
    18 hours
    4.97
  4. Ralph Swartwood

    Ralph Swartwood

    Certified WebSphere Administrator

    United States - Last active: 5 days ago - Tests: 1

    I have 10 years experience working with WebSphere Application Server version 3, 4, 5, 6 and 7 on AIX, Solaris, HP/UX, Linux, zLinux and Windows. I am certified in versions 5, 6 and 7. I am looking for short and long term engagements including installations, resolution of a specific problem and ongoing support. I also have experience working with WebSphere Portal Server, Process Server, IBM HTTP Server and Apache. I developed JACL and Jython scripts to automate application deployments and to make configuration changes. I am very familiar with Java programming of servlets, JSP, SQL and JMS. I developed a Nagios plugin that monitored JVM availability and Performance Monitoring Infrastructure (PMI) metrics. I can analyze thread dumps for JVM hang problems and heap dumps for OutOfMemory issues. I also have experience with DirectConnect and training in DataPower appliance administration.

    Groups: TrueBLUE

    $50.00 /hr
    44 hours
    4.60
  5. Steven Stovall

    Steven Stovall

    DevOps, Cloud (AWS/Google), Security. Development: Rails/Python/PHP

    United States - Last active: 5 days ago - Tests: 2

    I enjoy solving challenging problems and utilizing technology to creatively design efficient, cost-effective solutions to meet business needs. Current Certifications: CISSP, CCNP, Net+/Sec+, MCP Cloud (AWS/Rackspace), Linux, Windows, VMware HA/vMotion/vCenter Open Source Software: Apache, nginx, Redis, elasticsearch, Zabbix, Logstash Information Security Auditing, Configuration, Policy Networking: Visio Diagrams, IPSEC/SSL VPNs, OSPF/EIGRP/BGP, Adaptive Security Appliances (ASAs), Wireless Controllers, F5 LTM, WiFi (RF Design) Information Security: Visio Diagrams (architecture), PCI DSS compliance, Splunk (syslog) Vulnerability Audit and Penetration Testing: Metasploit, Nexpose, Nessus, Vulnerability Reporting, Patch Management Development: Ruby/Rails, Git, Python, PHP, Perl, PowerShell, Bash, .NET

    $60.00 /hr
    26 hours
    5.00
  6. Daniel Yavorovich

    Daniel Yavorovich

    System Administrator

    Ukraine - Last active: 4 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
  7. Ralf L.

    Ralf L.

    Certified Magento Developer (PHP, Wordpress)

    Germany - Last active: 10 hours ago - Tests: 6 - Portfolio: 4

    http://www.magentocommerce.com/certification/directory/dev/399/ Expertise in Magento/eCommerce Store Development , Extension Plugins Development, 3rd Party Gateway/App/Plugin/Script Integration, PSD to Magento Conversion, Theme Development, Upgrade and Migration, Magento Mobile Development. Working on Magento since first version so know all version as well as ways to customize it. I'm enthusiastic about eCommerce on web. I always code with extending Magento classes and methods rather than hacking its original code which is more standard and extensible way of adding functionality. I always use fully documented way on code and user manual which helps both developers and users to understand features and users. I'm a very good team player and like to solve problem quickly but standard Magento certified way, prompt reply and quick solution for any complex problems regarding eCommerce. My availability is more than 12 hours a day that fits with any time zone and I'm always connect via email so you don't have to wait for my reply. Service Description Magento/eCommerce Development Magento/eCommerce Store Development 1. Magento Extension 2. Plugins Development 3. Custom Magento Development 4. PSD to Magento Conversion 5. Magento Template Design and Development 6. Magento Integration 7. Magento Upgrade 8. Migration to Magento 9. Magento Mobile 10. Store Management Web Development 1. B2B Solution 2. Blogs 3. Forums Mobile Development 1. Android 2. iOS 3. HTML5/CSS3 based Mobile Website Content Management Systems 1. Wordpress 2. Joomla 3. Drupal 4. Elgg Object Oriented Programming/MVC Frameworks 1. Zend 2. CodeIgniter 3. Yii 4. Symfony

    $40.00 /hr
    836 hours
    5.00
  8. Darwin Luague

    Darwin Luague

    Experienced Laravel, PHP/MySQL, AJAX, JQuery, Vue.js Developer

    Philippines - Last active: 10 hours ago - Tests: 3 - Portfolio: 4

    Over the last 5 years, I have developed a wide range of websites using HMTL, DHTML, PHP, Codeigniter, Laravel and MySQL including sites for startup companies and small businesses. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. I also have some experience in the following areas: SQL, Ajax, OOP, and software design and testing.

    $6.00 /hr
    207 hours
    5.00
  9. Jasmin P.

    Jasmin P.

    Collaborative Web Dev

    Philippines - Last active: 1 day ago - Tests: 5 - Portfolio: 1

    I graduated Bachelor of Science in Information Technology. I have a total of five years extensive experience in web programming and development. I started creating websites since I was in high school. I am very patient and I listen to what clients would want to do. I want clients to create ideas in their minds and give the rest to me as I work my magic into it to make it happen. So, regards to my future clients! Let's make the most out of every creative juice we could squeeze.

    $16.67 /hr
    84 hours
    4.82
  10. Anton White

    Anton White

    Full stack expert (Django, Javascript)

    Russia - Last active: 1 day ago - Tests: 4 - Portfolio: 2

    Programming experience 20 years, Python 6 years, Django 5 years. I love creating Single Page Applications with Backbone-Marionette.js and Django framework. My main skill is a deep understanding of customer's business processes in combination with ability to participate in full stack development of the product. I have strong experience in different aspects of offline business thats why I understand customer's needs quickly. I enjoy building responsive, useful and clear pixel perfect interfaces which are easy to understand and enjoyable to operate with. I am a qualified developer of commercial and corporate CRM, ERP and e-commerce applications. My current favourite tech stack: Python3, Django, Django-rest-framework, Coffeescript, Require.js, Backbone.js, Marionette.js, LESS, Grunt.

    $33.00 /hr
    72 hours
    5.00