IT & Networking Administrators

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  1. Ivan Ershov

    Ivan Ershov

    Cloud Architect/Engineer/Devops / Linux Admin

    Russia - Last active: 11 hours ago - Tests: 11 - Portfolio: 2

    Over the last 10 years, I have been working as technical support engineer/team leader/infrastructure architect for the different companies with on-premise/cloud hosting. My competency lies in planning, development, deployment and setup of the environments from scratch, troubleshooting/support/improvement of existing production systems based on Linux/Unix with the focus on automation and high availability. Have a lot of experience in automation/monitoring/backup of different distributed environments with LAMP stack and other applications, different clustering, scalability and high-availability techniques. Operating systems: Debian/Ubuntu, Redhat(Fedora, RHEL, Centos), Suse, AmazonLinux Level of skill with Unix/Linux: RHCE MailServers: qmail, postfix, sendmail etc Databases: Postgresql, Oracle, Mysql, noSQL databases (Mongodb, Cassandra, Couchbase, Redis etc) Clustering: RHCS, terracotta, heartbeat, pacemaker, distributed balanced setups Programming, scripting languages: Bash, PL/SQL, Ruby Clouds: AWS/Tata/RackSpace/CloudStack/Openstack/Azure Automation: Chef/Puppet, RightScale, AWS Opsworks,CloudFormation etc Continuous integration/deployment: Docker, Atlassian tools, Jenkins, SVN/Git, Codebase etc. Loadbalancers/proxies: Clouds LBs, Haproxy, mod_jk, Squid, Apache, Nginx Application servers: tomcat, jetty, jboss, Apache, Nginx, different PHP-based servers Monitoring: Nagios, Zabbix, Newrelic, OMD etc English: fluent Availability: up to 30hrs/week

    $38.89 /hr
    1,845 hours
    4.96
  2. John B.

    John B.

    Microsoft Certified | Senior Developer | Team Leader

    Australia - Last active: 13 days ago - Tests: 9 - Portfolio: 3

    Over the last 15 years I have continued to develop my career, skillset, knowledge and experience. The last couple of years, upwork has introduced me to a great number of great people and projects. Two of these projects will be briefly outlined below. The first was designing and implementing a 4 million hits / day infrastructure to handle advertising banners. This client had a business requirement to greatly extend the reach of the live infrastructure. This project was completed in PHP / MySQL and is currently hosted on a cloud platform. This project scales automatically as required to handle any variation in the daily load. The final project was a hospital scheduling task. This client worked for a hospital and had over 30 different scheduling rules for every time-slot. The client used to do this manually and it took hours every week. I came up with a VBA based solution that would automate this task. On completion, the task took about 20 seconds to execute and correctly assigned all time-slots to the correct hospital resources. I would like to continue to be exposed to new and different challenges, that will further develop my skills and career. I also really enjoy making new contacts on the upwork network. I look forward to the many varied opportunities and roles that upwork offers.

    $44.44 /hr
    2,592 hours
    4.92
  3. Ashraful S.

    Ashraful S.

    Software Engineer

    Bangladesh - Last active: 1 day ago - Tests: 9 - Portfolio: 12

    To work as a part of a dynamic team where there will be opportunities to make significant contributions. The work environment should require innovations that would utilize my educational qualifications, capabilities and practical and professional experience. javascript - 6+ years ajax - 6+ years extjs - 4+ years jquery - 5+ years angularjs - 2+ years node.js - 3+ years html - 6+ years css - 6+ years php - 6+ years java - 6+ years spring - 3+ years struts - 3+ years database - 6+ years bitcoin/litecoin technology - 2+ years

    $27.78 /hr
    5,408 hours
    4.81
  4. Long Doan

    Long Doan

    HTML5, WordPress, Responsive, Bootstrap, AngularJS, Frontend Rockstar

    Vietnam - Last active: 3 days ago - Tests: 2 - Portfolio: 7

    Professional guru with 6+ years of experience in web development. I can work individually or quickly put together a team of highly experienced developers and designers. I used to be a full stack developer. For the past 3 years, I have been focusing on only two things: - Front-end development - WordPress As I focus only on this, my turnaround time is extremely fast and it would help you save a lot of time and cost. With the quality guaranteed, it would also save you much effort of coming back and forth to test for bugs. And as a full stack developer, I know exactly what a back-end developer would need, so my front-end code is always prepared for all the cases. The code is high quality, semantic, well-documented, clean with minimum duplication, readable with white spaces, and easy to maintain and extend. I'm also a pixel-perfect person, but since the product must work perfectly on all screen sizes, I'll take initiative and amend if it's off the grid. I can quickly adapt a desktop design to tablet and phone screen sizes. My passion is making responsive sites (compatible with tablets/mobiles) with focus on performance, SEO optimization, and user experience (UI/UX): - HTML5, CSS3, CSS 3d transition. - SASS/SCSS, LESS, Neat/Bourbon, Foundation, Twitter Bootstrap. - Javascript, jQuery, Angular JS. - Building single-page web applications which work seamlessly with RESTful API web services. - Git, Github, Bitbucket, Subversion (SVN). - Very proficient with Photoshop. - I have my own server for demo purpose and a private Git server in case you need.

    Groups: Pro Web Designers

    $40.00 /hr
    567 hours
    5.00
  5. Muhammad Yousuf

    Muhammad Yousuf

    VoIP/Linux Administrator

    Pakistan - Last active: 3 days ago - Tests: 2 - Portfolio: 1

    I always love to learn new technologies and try my best to accomplish new and challenging tasks. 1. Complete IP PBX from scratch (Asterisk and freepbx) 2. Elastix (call center, fax server) 3. PIAF (With all Nerd Vittels scripts and tricks) 4. Trixbox and Freepbx Distro 5. Call center applications (Goautodial, Vicidial, Elastix) 6. Broadcast and AutoDialer(Goautodial) 7. VoIP calling card, pinless calling, wholesale, DID reselling (A2billing) 8. CRM with VoIP integration (Vtiger, SugarCRM, SuiteCRM) 9. Security of Servers and VoIP (Firewalls, Monitoring, Aleting) 10. VoIP security (Application security, Brute force attacks prevention, Fail2ban) 11. Monitoring of Servers and services (Nagios, Opsview) 12. High Availability and Failover (Heartbeat, DRDB, Pacemaker, Corosync) 13. Auto Proviosioning of IP Phones (Multiple vendors) 14. Asterisk custom dialplan 15. Fax server (Hylafax, Avantfax) 16. CDR statistics, Centralize CDR server for multiple Asterisk servers. 17. Missed call notifications, Queues reporting for Asterisk 18. Asterisk Operator Panels (Isymphony, FOP2) 19. VPN (OpenVPN, IPsec, PPTP with firewall security) 20. IVR (Database Backends) 21. Asterisk Integration with Digital PBXs i.e. Avaya, Nortel(sip trunking and PRI trunking) 22. GSM gateways with Asterisk (Openvox, GoIP, Dinstar, Quescom) 23. Networks (Switching, Routing, Security, Monitoring, Alerting, Optimization) 24. Firewalls (Pfsense, UTM, IPTables) I have practically experience of all the above mentioned products and technologies and I completed many custom projects using these. I am not limited to only these technologies, I always welcome to know new technologies and environments. I am always ready for a test job to prove my skills :-).

    $22.22 /hr
    198 hours
    4.97
  6. Matias S.

    Matias S.

    DBA SQL Server

    Argentina - Last active: 14 days ago - Tests: 4

    I´m very proactive with great capacity for the capture of decisions, I work well under pressure. Very interested in growing professionally and acquiring new knowledge. I am very interested in DBA's role, I wanted to learn more about all different strategies to improve performance and about new products. I have great experience on Windows and SQL instalation and patching, and with SQL features like Transactional replication, Log Shipping, Mirroring. Also with Transact-SQL (I´m also SQL Developer), PowerShell and batch scripts, Reporting Service (SSRS) Installation, configuration and report developing. I have studied and worked with VB6 and Vb.NET, VBA, asp.NET, Excel reports, Crystal Reports, Microsoft Dynamics ERP.

    $22.00 /hr
    365 hours
    4.87
  7. Muhammad bilal H.

    Muhammad bilal H.

    Certified Message Broke / MQ / J2EE / SOA Integration Developer

    Pakistan - Last active: 1 day ago - Tests: 2 - Portfolio: 1

    Certified Websphere Message Broker, MQ, JAVA, JEE Consultant with have around 8 years of hands on Middleware Integration Desing and development experience. Excellent working knowledge of designing and developing high performance middleware integration services using different integration technologies; i.e. IBM Websphere Message Broker v7, v8, IBM Integration Bus v9, Message Queue (MQ), Business Process Manager, Business Monitor, Web Services etc. in SOA environment, Expertise: IBM WebSphere Message Broker v7 and v8, IBM Integration Bus (V9), IBM WebSphere MQ 7.0 and MQ 7.5, Business Process Manager, Business Monitor, Servlet, JSP Struts1.x, Struts2, Spring, Hibernate, Web Services, JSTL, XML, Tomcat, MySQL, IBM informix, IBM DB2, Postgres SQL,JBoss Seam, Excellent UI development skills using HTML, CSS Java Script Jquery, YUI, XHTM, I believe in top quality work. and I am here to provide top quality services to my clients.

    Groups: Oracle Certified Professionals

    $28.00 /hr
    830 hours
    4.87
  8. Dharmesh P.

    Dharmesh P.

    Official Odoo(OpenERP) Partner - ERP Solution Expert

    India - Last active: 1 day ago - Tests: 2 - Portfolio: 8

    With over 8+ years of experience in Odoo(OpenERP) and having worked for 900+ hours on oDesk, I offer Odoo(OpenERP) Development, Customization, Integration, Migration, Implementation as well as Maintenance and Support. I also conduct Odoo ERP Functional as well as Technical Training. I can deliver cost-effective, high quality and user-friendly open source solutions catering to your business needs.

    Groups: Application Developers Alliance

    $20.00 /hr
    961 hours
    4.98
  9. ahmed dghaies

    ahmed dghaies

    Joomla and Wordpress Developer

    Tunisia - Last active: 1 day ago - Tests: 13 - Portfolio: 12

    Joomla & Wordpress Developer,Reliable and professional and able to make you more satisfied than you can expect. Over the last 5 years, I have developed a wide range of websites using HTML, DHTML, PHP, and MySQL including sites for startup companies and small businesses using Joomla,Wordpress and Drupal. 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,Java application development,Web Scraping,PSD to HTML,Bootstrap, Mobile development using Titanium SDK and J2EE application development (JSF,PRIMEFACES,HIBERNATE and SPRING)

    Groups: Bluehost Developers and Designers, JomSocial

    $20.00 /hr
    973 hours
    4.65
  10. Roman Gorokhov

    Roman Gorokhov

    Expert FreeBSD/Linux Administrator

    Spain - Last active: 3 days ago - Tests: 6

    • 15+ year’s experience in the IT field. • Deadline conscious on all projects and assignments. Resolved IT related issues and concerns under strict deadlines. • Proactively implemented enterprise project deliverables at basic to intermediate levels. • Provided installation, configuration and maintenance of UNIX -based systems for different tasks: http, mail, ftp, dns, proxy, firewalls, smb, backup; web applications – from postfixadmin tо sugarcrm. BSD, Linux, Solaris, QNX. FreeBSD is my favorite. • FreeBSD Port contributor.

    $25.00 /hr
    111 hours
    4.82