Network & System Administrators

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  1. Ivan T.

    Ivan T.

    Ruby / Rails Architect w/ scaling exp. 8 yrs, 12k hrs, 100pct success.

    Russia - Last active: 1 day ago - Tests: 3 - Portfolio: 1

    Independent full-stack developer / technical architect skilled in: * Ruby / Ruby on Rails (from edge to legacy) * Scalable, decentralized (modular) applications architecture * Databases: relational (PostgreSQL, MySQL), NoSQL (Redis, Riak, MongoDB, Neo4j), big-data-specific (Google BigQuery, Amazon Redshift) * Background jobs processing: Sidekiq, Resque, delayed_job * Message queuing: RabbitMQ (AMQP) * Client-side tech (HTML5 / CSS3 / JavaScript [native / AngularJS]) * RESTful APIs implementation, integration with any third-party APIs, data harvesting from sites which do not provide an API * Social media integration (authentication, querying, publishing): Facebook, LinkedIn, YouTube, and more * Process: TDD/BDD with RSpec, Cucumber, Capybara, Zeus, Guard * Rails applications deploy, monitoring, maintenance: Heroku, Amazon EC2, Linode, Heroku) * Amazon Web Services infrastructure: EC2, S3, Glacier, Redshift,.. * Version control systems: svn, git (with GitFlow, GitHub Flow workflows) As a back-end technical architect / developer, I can develop scalable and stable multi-node server-side applications and also can evaluate your Ruby/Rails application and make suggestions on possible optimizations / refactoring / adopting best practices. As a team lead, I can divide, regroup, prioritize and delegate tasks to developers, consult developers on best practices, ensure high overal quality of software product. I like challenges, have solid skills of problem solving, do not require supervision to successfully perform my duties. Dependability is also one of my key strenghts (never left my work half-done / half-functioning). If my current rate fits your project's budget, contact me to discuss technical and other aspects — I'm looking forward to it.

    Groups: Engine Yard Ruby on Rails Professionals Network, oDesk Verified Web Developers

    $100.00 /hr
    12,809 hours
    5.00
  2. Igor Crnković

    Igor Crnković

    Web map Javascript and Python developer

    Croatia - Last active: 1 month ago - Tests: 5 - Portfolio: 4

    CEO of Candela-IT, company specialized in development of customized webGIS solutions. We prefer working with open source technologies like Python, Django/GeoDjango, PostgreSQL/PostGIS, Mapserver, Mapnik, OpenLayers, Leaflet, Backbone, jQuery, D3, Raphael, QGis (Quantum GIS) and so on. We also offer consulting services in all phases of the entire webGIS project life-cycle.

    $66.67 /hr
    505 hours
    4.99
  3. Dragos Madarasan

    Dragos Madarasan

    System administrator [MCTS, CCNA] , Google Apps Certified Specialist

    Romania - Last active: 7 days ago - Tests: 3

    During the past 4 years I have specialized in managing Windows, Active Directory based networks. I am skilled in System Center Configuration Manager 2007 and System Center Data Protection Manager (2007/2010). I also posses networking skills (TCP/IP, DNS, DHCP, VPN, Wi-Fi) and am comfortable with Cisco switches and routers. Lately I am very interested in cloud based applications and Google Apps in particular. I am a certified Google Apps Deployment Specialist

    Groups: Microsoft Certified Professionals

    $35.00 /hr
    124 hours
    4.70
  4. Muhammad Asif

    Muhammad Asif

    Wordpress | Wishlist Members Expert | DAP Expert | OP.2.0 Expert.

    Pakistan - Last active: 2 days ago - Tests: 4 - Portfolio: 19

    I am expert in building websites using: Wordpress, Php, MySql, HTML/CSS, Technical Customer Support Management, Joomla, Woo Commerce, Wishlist members, Digital Access Pass (DAP), Optimize Press 1.0 and 2.0, Genesis Framework, Woo Framework.. Cloning and migration. Integration of 1shoppingcart, Premium Web Cart, 2co, Paypal Clickbank. Customization of: Aweber, MailChimp, GetResponse, IContact Form and setting up. I am a quality communicator and deliver project in time so far throughout the Odesk history. I have earned certificate for Woo Commerce sites setup and Creation and Managing Responsive templates.

    Groups: Bluehost Developers and Designers

    $56.00 /hr
    4,603 hours
    4.99
  5. Bogdan B.

    Bogdan B.

    Linux System Administrator / DevOps

    United States - Last active: 11 hours ago - Tests: 2 - Portfolio: 4

    - 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 System Performance Optimization - Wordpress Performance Optimization - Mysql Perfomance Optimization, Replication - Full Disk Encryption / Remote Unlock /PXE unlock (Luks/DiskCryptor) - Load Balancer (haproxy)

    $38.89 /hr
    250 hours
    5.00
  6. Umer S.

    Umer S.

    iOS/Cocos2d/Cocos2d-x/Unity3d Developer

    Pakistan - Last active: 1 month ago - Tests: 3 - Portfolio: 4

    Over the last 4 years, I have been working as a Lead Mobile Developer. My expertise lies in iOS, Android and Unity3d development. I have wide range of experience in native applications, Cocos2d and Unity3d Games. I also have great skills in Cocos2d-x and Unity3d for cross platform release. Any sort of Ads integration or In-App Purchases (Charboost, PlayHaven, iAD, Vungle, AdMob, AirPush, MoPub, AppLovin etc.) for both iOS and Android is a piece of cake for me. I can assist in any kind of Mobile Development problem, from start of its development to the final upload. My core competency lies in the complete satisfaction of my clients. Here at oDesk, i am seeking opportunities to work with professional clients and to have long term business relationship.

    Groups: Upwork Verified Mobile Developers

    $33.33 /hr
    1,008 hours
    5.00
  7. Alex Fortuna

    Alex Fortuna

    Senior Ruby on Rails Developer / Development Consultant

    Russia - Last active: 1 day ago - Tests: 9 - Portfolio: 2

    I'm seeking opportunities to build high-quality dynamic web solutions in Ruby on Rails. I've got a solid programming background with over 15 years experience. I'm a self-organized, disciplined and quality-oriented performer with good team management skills. A list of skills/features follows. * Passion for programming. * 15+ years overall development experience in 10+ languages. * 10+ years team leadership experience. * 10+ years Unix admin and TCP/IP networking experience. * 7+ years Ruby experience. * 5+ years Ruby on Rails experience. * Contributing to Ruby/Rails open source community (https://github.com/dadooda). * Clean, distinct, well-documented and reusable code is a *MUST*. * Solid understanding and everyday use of TDD (RSpec). * Strong JavaScript: raw language, jQuery, frameworks. * Everyday Git usage. * Practical programmer’s knowledge of HTML/CSS. * Hands-on experience of building high-traffic web applications in Unix environment (nginx, memcached, SQL server tuning, load testing tools, etc.). * 10+ years LAMP experience.

    $37.00 /hr
    2,462 hours
    4.64
  8. Andrii K.

    Andrii K.

    System Administrator

    Ukraine - Last active: 11 hours ago - Tests: 5 - Portfolio: 3

    Last 6 years I have engaged in system administration using Apache2, Nginx, PHP, Perl, Python and MySQL including sites for startup companies and small businesses. extensive experience in the deployment of sites and projects of varying complexity, and I am seeking opportunities help you to build your business. I have great experience in: - Linux maintaince/troubleshooting: Debian, CentOS, Gentoo, Ubuntu, RHEL etc - Apache2 + Nginx, Nginx + PHP-fpm, Nginx + PHP-fastcgi, MySQL, Varnish, Memcached. - Linux serverside: iptables, rsync, Bind, OpenVPN, - Mail: Exim, Dovecot, Postfix. - Cloud Hosting: Digitalocean, RackSpace, Amazon (EC2, AWS, S3), Linode, GoDaddy - Hosting providers : Softlayer, Hetzner. - Backup/Migration - Hosting panels : Plesk, whm\cPanel, ISP , DirectAdmin, Virtualmin - Virtualization: Xen, KVM, OpenVZ, Proxmox - Monitoring: Zabbix, Munin, Cacti, Nagios - CMS : Wordpress, Drupal, Magento, Joomla, CS-Cart

    $30.00 /hr
    1,506 hours
    4.99
  9. Gautam Manohar

    Gautam Manohar

    Cloud Scalability & Devops Consultant

    India - Last active: 11 hours ago - Tests: 4

    Skills : Puppet, Chef, Ansible, Docker. Rapid deployment & scaling in Amazon AWS, EC2, S3, RDS, SQS, SES, SDB, CloudFront, VPC, Nagios, Zabbix, Apache, Memcache, Mysql, PostGresql, MongoDB, PHP, Ruby, Capistrano, Hadoop, Apache Cassandra, ActiveMQ....(and more) IT professional with 7 years experience in various IT technologies and systems. Excited about rapidly scaling architecture, Linux/Unix systems administration and related technologies that enable a Robust, highly Available, highly Redundant Enterprise Class System.

    $66.67 /hr
    1,786 hours
    5.00
  10. Alan K.

    Alan K.

    IT Architect - Network Specialization

    Sweden - Last active: 1 day ago - Tests: 4 - Portfolio: 1

    Education Technical Highschool Degree= Computer Programming Specializiation Associate Degree =Software Programming Bachelors Degree = Bch in Computer Science - Network Security Specialization Masters Degree(In progress)= Communication Systems (Internetworking) Professional Recognitions Cisco Certified Network Associate Cisco Certified Network Professional Cisco Certified Security Professional Cisco Certified Internetwork Expert (Lab Pending) Cisco Certified Academy Instructor Public Recognitions Cisco NetPro (husycisco) https://supportforums.cisco.com/reputation.jspa?username=husycisco Experts-Exchange Qualified Expert (MrHusy) http://www.experts-exchange.com/M_3788926.html 10+ (Intense) years of experience I am already helping people out in above communities for free, you can feel safe that you wont have a poor delivery of tasks or projects.

    $67.78 /hr
    260 hours
    5.00