IT & Networking Administrators

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  1. Bhushan Katariya

    Bhushan Katariya

    Microsoft Windows and Exchange Analyst

    India - Last active: 1 month ago - Tests: 3

    A Highly motivated and result-oriented individual with over 10 years of experience in a professional environment having a great work culture and meticulous attention to detail with emphasis to customer satisfaction. Ability to achieve set targets and goals in a timely manner. Microsoft Certified System Engineer in Windows Server 2003 with Exchange and Technology Specialist in Windows Server 2008. Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft Exchange Server suite (2003 to 2013). Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft Active Directory Services(2003, 2008). Extensive hands-on experience in configuring, monitoring, and maintaining systems running Microsoft Cluster Services. Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft SharePoint Services(MOSS 2007). Troubleshooting Windows Server related issues(AD, DFS, IIS, DHCP, DNS, and WSUS) Projects, Installations, Configurations and Migrations etc. Configuring and troubleshooting on Mailbox, CAS, and Hub and Edge server roles installations. Configuring High availability solutions like Local Continuous Replication/Cluster Continuous Replication/Standby Continuous Replication technologies. Troubleshooting on Mailbox Migration, Public Folder replication, Database Inconsistency, Exchange services, Offline Address Book, Recovery Storage Groups. Implementing Disaster Recovery in exchange servers for recovering exchange information. Configuration and Troubleshooting External Mail flow (Inbound/Outbound), Mail flow between servers, Spam issues, Edge Synchronization. Configuring Anti spam/Transport agents, Application Relay, SMTP/Transport service problems. Analyzing and evaluating issues using various tools and utilities like EXBPA, EXTRA, ExMon, PFDAVAdmin, Exmerge, DCDIAG, NetDiag, NLtest, telnet, Replmon, AD modify, ADMT, MFCMAPI, etc. Installation, Configuration & Monitoring of Trend Micro Internet Messaging Security Suits & Symantec Endpoint Security. Basic Hygiene & Server hardening of all Windows OS, Linux OS & Subsystems likes IIS, ADS, and SQL Server etc. Security Health Check of all Windows & Linux OS. Ensure documentation of all activities & procedures adhering to organization standards.

    $13.33 /hr
    316 hours
    4.83
  2. Maciej Dolinski

    Maciej Dolinski

    Excel power user

    Poland - Last active: 16 hours ago - Tests: 2 - Portfolio: 1

    A seasoned telecom and ICT engineer with over 25 years of experience in Microsoft Excel spreadsheets design and data manipulation. If you need a spreadsheet, a dashboard or to have your data analyzed, I am the right choice. Native Polish, speaks English fluently, can easily discuss in Czech and Slovak. Well experienced in English<->Polish technical texts translations and manuals creation. Located in Warsaw, Poland, but well accustomed to work remotely with contacts over Skype.

    $12.50 /hr
    116 hours
    4.93
  3. Valentyn Kalyn

    Valentyn Kalyn

    Senior Ruby Developer

    Ukraine - Last active: 16 hours ago - Tests: 2 - Portfolio: 2

    • 5+ years of professional expertise in the Information Technologies (IT) industry • Experience in Ruby on Rails technology • Experience in Ruby and PHP scripting languages • Solid experience in JavaScript language, knowledge of AngularJS • Rich expertise in Web development (Ruby/PHP/JavaScript + MySQL/SQLite/PostgreSQL/MongoDB) • Development & expertise highlights: - Web 2.0 applications development - Client-server application development.

    $27.00 /hr
    316 hours
    5.00
  4. Igor K.

    Igor K.

    Expert C#, ASP.NET MVC, Angular Js Developer

    Russia - Last active: 16 hours ago - Tests: 2 - Portfolio: 4

    I have been developing using .net and c# for about 6 years, 4 of them in a team commercial development with .net 3.5-4.5, wcf, wpf, winforms, asp.net mvc3, mvc4, entity framework postgresql, mssql and more. Now I'm freelancing. My primary specialization is highload client-server applications, gis and transport monitoring systems and web mvc applications. But I have been involved in many other projects and I can and can work with any project related to .net.

    $20.00 /hr
    247 hours
    4.92
  5. Emil Drkušić

    Emil Drkušić

    experienced database developer, programmer, financial analyst

    Croatia - Last active: 16 hours ago - Tests: 1

    My jobs so far included analysis of customer requirements, consulting, coding and deployment on two major projects (one was developing ERP for telecommunication sales company and other was on-line system for tracking shares and funds values), work on few smaller projects and teaching (databases, math, programming, logic). Most of smaller projects were applications based on MS Access, usually connected to MS Excel as data source or output for further analysis. Most of my work was/is related with databases from database modeling and coding and than producing complete applications with GUI. Technologies I used so far were MS-SQL, MySQL, MS Access+Ms Excel (few complete applications with more than 50 forms each in usage by clients), C++, Pascal. Maybe most interesting is development of complete MS Access applications as well as using VBA in Access or/and Excel, but feel free to contact me for any of above. I think that my experience and knowledge are enough to get job done faster (and of course cheaper) but not loosing any quality in process.

    $56.00 /hr
    70 hours
    5.00
  6. Maciej Klepaczewski

    Maciej Klepaczewski

    Web Performance Optimization Engineer

    Poland - Last active: 16 hours ago - Tests: 2 - Portfolio: 2

    I specialize in Website Performance Optimization (WPO). In particular I do: * MySQL optimization, * PHP optimization, * HTML/JavaScript/CSS related optimizations. I can guarantee page loading times in range of 1-3 seconds or less. I also have experience in web scrapping and handling large amounts of data (where by big data I mean at least dozens of gigabytes). I have masters degree in Computer Science from Wroclaw Technical University. I'm experienced programmer with 15 years of experience (I coded my first software in high school).

    $80.00 /hr
    877 hours
    5.00
  7. Peter Simard

    Peter Simard

    Expert Programmer (Unity, PHP, ASP, Java, C#)

    United States - Last active: 16 hours ago - Tests: 3 - Portfolio: 7

    Professional game developer who is committed to delivering high quality results. I have developed and published multiple successful mobile and desktop PC games, as well as websites. I have been working the past 6 months on a full scale MMORPG using Unity. I can handle any of your technical requirements including core gameplay coding, networking, interface, SDK integrations, and more. Video showcasing Unity MMORPG that's been in active development: https://www.youtube.com/watch?v=Jh56JPp0xjM With that project on hold, I am dedicating my time to freelancing and can promise your project requirements will be fulfilled to the best of my abilities. Lead developer of the MMORPG Crowns of Power (Featured at E3 2009) Developer of the SerenityPHP framework Lead programmer for the web game "GreedInc" Lead developer for Android apps 'Squashed', 'WordCraft', and 'Mana Rush'

    $29.44 /hr
    235 hours
    5.00
  8. Mauricio Offermann Palma

    Mauricio Offermann Palma

    Computer Engineer

    Chile - Last active: 16 hours ago - Tests: 2

    I'm a Computer Engineer , during my career I have worked managing , designing and developing custom web applications for clients of different nature and in many different languages, but definitely my biggest strength is Salesforce APEX. My experience divided into three areas: Project Management We perform planning activities in the short term , while maintaining excellent communication with the customer , give daily reports on the progress of the project which include the activities performed, the problems encountered and the proposed solutions . Application Design Often the technical details make a big difference in implementation , which is why I worry about guiding the client presenting the best solution strategies , considering important issues such as security of information, the application performance , use of resources , the way they behave in the future scenarios with massive data loads or increased volumes of information. Software Development I believe that application development is my strongest skill have much experience in various languages ​​such as Java, C # or Ruby , mainly oriented web solutions , management naturally javascript ( including jQuery ) , CSS , JSP , HTML . Have special ability to manage MySQL , PostgreSQL , SQL Server and more databases. However, the last 7 years I have specialized in developing applications on the Salesforce CRM . These applications include design , process automation , configuration , workflows , validation rules , triggers, Visualforce pages, Apex classes and components . In addition to integrations with other systems using webservices and bulk batch .

    $40.00 /hr
    1,335 hours
    5.00
  9. Dmitry Sytchev

    Dmitry Sytchev

    Asterisk/Freeswitch/Kamalio expert, VoIP engineer, Linux administrator

    Russia - Last active: 1 month ago - Tests: 7 - Portfolio: 1

    I have more than 10 years of experience in installation and support of carrier-grade VoIP services based on Asterisk, OpenSIPS, Kamailio, Freeswitch and proprietary SIP/VoIP software. My professional interests are Callcenters, automated dialer systems and integration of VoIP software with company information flows. You can rely on my strong engineering and programming skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analysis, security and fraud prevention. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco AS5300/5500, Audiocodes Mediant 2000, Quintum Tenor). I have experience in setup, administration and security of Asterisk, FreePBX, Elastix and FreeSWITCH PBX installations. As a programmer I use PHP, Javascript (both client-side using jQuery and Angular.js and server-side with node.js), Perl (system scripts/applications, Mojolicious webapps). I also have experience in development and administration of MySQL and Microsoft SQL Server databases. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security, including HA solutions (heartbeat/pacemaker). I use Zabbix and have some experience with Nagios and other monitoring software. I can also offer you consulting support in VoIP and network technologies.

    $33.33 /hr
    93 hours
    4.96
  10. Khushal Singh

    Khushal Singh

    PHP5, MySQL, MVC, CakePHP, CodeIgniter, jQuery, AJAX

    India - Last active: 6 days ago - Tests: 5 - Portfolio: 3

    I've started working and learning on PHP in 2009. Since then I experience OOPs in PHP with various huge PHP frameworks like CakePHP, Codeigniter, Yii etc. I love to work with jQuery and can now write fully functional optimized solutions with less server resources utilization which finally leads to best available performance from a web server. I have vast experience in Ajax , XML , SOAP , REST APIs etc. I have also worked in Phonegap, Google Maps APIs, Facebook Applications and Other Social media integration in Authentication. I have also written a wide variety of XML and JSON Web Services. Of course applications created by me are tested before delivery. I have practiced securing the Applications with best available techniques. I have good knowledge of CSS and Javascript with vast experience in Twitter's Bootstrap Responsive Web Applications. Get me interviewed and see your thoughts in action. :)

    $22.22 /hr
    282 hours
    5.00