IT & Networking Administrators

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  1. Daniel Yavorovich

    Daniel Yavorovich

    System Administrator

    Ukraine - Last active: 7 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
    40 hours
    5.00
  2. Arthur G.

    Arthur G.

    C++ Expert with multifarious hands-on experiense

    Russia - Last active: 4 days ago - Tests: 2

    Hands-on experience of 10+ years in software development. C++, C#, SQL, html and many other under Windows, MacOSX, Linux (mostly Ubuntu) and rtos. Strong Computer Science background. Please direct your attention to Employment History section of the profile for details. Thanks in advance! St. Petersburg University of Telecommunications graduate. Was teaching C++ for 7 years.

    $34.00 /hr
    146 hours
    5.00
  3. Claudio D.

    Claudio D.

    Web Developer, IT Consultant

    Italy - Last active: 1 day ago - Tests: 6

    For the last 10 years I worked as web developer and Unix systems administrator for private, public and ecclesiastical entities. I have a solid knowledge of web technologies, Unix shell scripting and development tools. I can help you building structured web applications, chrome extensions, firefox addons, web crawlers, scrapers, command-line scripts, automated systems and much more. As my job history shows, I can deliver high quality work for either small ($15) or large ($15,000+) projects. I'm currently focused on the Dart programming language. As a Dart early adopter, I'm a long time community contributor, my contributions include writing articles, open-source projects, speaking at conferences and presenting episodes on Google Developers Live. Portfolio: https://github.com/claudiodangelis

    $50.00 /hr
    634 hours
    5.00
  4. Gabriel Moncarz

    Gabriel Moncarz

    Computer Engineer - Python developper

    Argentina - Last active: 16 hours ago - Tests: 5 - Portfolio: 1

    Computer Engineer, Master in Quantitative Finance and curruntly studing a master in Data Mining and Knowledge discovery. I've been developing backend software, tools and plugins to international companies for the last 10 years. I code in Python, Perl, Java and C. All my developments run on Linux and Unix environment. I manage Linux servers, DB Engines, Tomcat/apaches servers and most well known Linux tools and services. For statistical analysis I work with R, SPSS and MatLab.

    $38.00 /hr
    2,604 hours
    5.00
  5. Hans F.

    Hans F.

    American SQLSrvr/Access Developer, Sales Exec, EN-ES Translator/Editor

    Philippines - Last active: 17 days ago - Tests: 8 - Portfolio: 5

    *MS SQL Server/MS Access/VB/VBA RDBMS software application architect/business analyst/programmer/tester/implementer/system and DB administrator; *MS Office/MS Excel programmer. *B to B Sales & Sales Executive/Director, Direct/Indirect Marketing Executive *Technology, Real Estate, Financial/Banking, Tourism/Travel, Public Utilities, etc. *Translator, writer, editor, proofreader, and teacher - experience on 4 continents; *Native spoken/written in English and Spanish, and experience with additional languages, including French, German, Italian, and Tagalog; *Teachers and English/Spanish translation/instruction training in USA, Europe, and Latin America; *ESL/EFL/TOEFL/TESOL/business/conversational/pronunciation (phonetics/phonology) instruction; *Kindergarten through high/prep school, and private tutoring of all ages and materials; *EN-ES/ES-EN translation of general text, business, web, medical and information technology materials; *Freelance, creative, travel, journalistic, medical and information technology writing; *Proofreading.

    $38.89 /hr
    1,337 hours
    5.00
  6. An SheiPei

    An SheiPei

    iOS & Android app Developer

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

    During last 5 years, I have developed lots of games and apps for iOS and Android platforms, which are widely used over the world. I am expert in development tools such as Xcode, Android Studio. As a developer, I promised with you following services; - High Quality - Smart & User-friendly UI - Hard Working - Double Speed - Idea Contribution I have rich experienced in the following areas. APIs & Frameworks - Languages: Cocos2d/Cocos2d-x, Objective-C, Swift, Java, MySQL, Visual C++. - Platforms: Android, iOS, Windows - Tools: Xcode, Eclipse, VisualStudio. - Frameworks: Cocos2d-x, Cocos2d - Web Service, XML, JSON, RSS - Admob, Chartboost, RevMob Code Management - Git ( Github, Bitbucket, Barnyard ... ) - Svn ( XP-Dev, ... ) Thank you for reading my letters. An SheiPei.

    $30.00 /hr
    30 hours
    5.00
  7. Alexey Novokreschenov

    Alexey Novokreschenov

    Expert Delphi & SQL Developer

    Russia - Last active: 3 days ago - Portfolio: 3

    12+ years of extensive experience in the software development for MS Windows and Mac OS X, most of this time as a lead software engineer. Excellent knowledge of Object Pascal and Delphi 7 / XE - XE7 (it's my primary instrument), deep knowledge of RTL / VCL, experience in the development of their own VCL components, knowledge and experience in the use of COM / DCOM / OLE / ActiveX technologies, experience with MS SQL Server 2000/2005/2008, Interbase / Firebird and MySQL RDBMS, deep knowledge of Transact-SQL / PSQL, knowledge and experience using Windows API. Knowledge and experience with C / C++, including the ability of porting the code from C to ObjectPascal. I have knowledge of the entire line of Windows OS, including server platforms Windows 2003/2008/2012, along with administration experience (IIS, ActiveDirectory etc.). I have no problems with use of third-party libraries and components, as well as the refinement of already existing / "foreign" source code.

    $30.00 /hr
    11 hours
    4.99
  8. Alin Barbu

    Alin Barbu

    Developing high quality native apps.

    Romania - Last active: 1 day ago - Tests: 4 - Portfolio: 7

    iOS Development | Android Development | UI/UX Design | QA Testing | Backend Solutions | Project Management | Bug Fixing | Porting Apps Between Platforms I am a full-service mobile developer and our mission is to help entrepreneurs and business owners expand their reach in the rapidly growing mobile marketplace. I have always worked towards putting together a solid team of experienced engineers, able to properly handle all aspects of development. From simple but intuitive principles to complex functions and backend coverage, I am always looking for our next big challenge. If youíre interested in starting a new mobile venture, then I am interested in hearing from you. I can provide: 1. Complex functionality I have a wealth of experience in both iOS and Android platforms: tell us what you want your app to do and weíll tell you how it can be done. 2. Integration with 3rd party APIs A lot of remarkable technology is already available which can be used to enhance the userís experience. I know how much this can improve an appís value and we never shy away from using the latest trending APIs. 3. Eye-catching designs I know how important it is for each app to have a unique and attractive look. That's why design is very important to us and our creative team has always come through in this regard. 4. Stability I will ensure the app is functioning properly and resists to stressful situations. 5. User-friendly, intuitive layouts I understand the importance of providing the user with a pleasant experience every time they access the app. This is another key focus that will always be covered in the design stage. 6. Feedback and consulting Having been in this business for a long time, we can provide our clients with thorough insights and qualified suggestions. I take a genuine interest in the apps we work on. You can always expect us to welcome questions and discuss the project together. 7. Quality Guaranteed Once an app is released, we provide a 6 Month Quality Guarantee. If any issues were to arise during that time which fall within the scope of the project, I will handle them free of charge. Our General Approach to Development: 1. Project breakdown Review the scope of the project; determine requirements and provide an approximate cost 2. Wireframing Create a visual representation of the project breakdown See example here: https://dl.dropboxusercontent.com/u/8542183/wireframe_example.png 3a. Graphic Design Decide color palettes, create layouts, icons etc (overall branding and design of the app) 3b. Web and Backend work At this stage, we also begin work on any 3rd party requirements the application might have. 4. Development We provide development builds and updates regularly (at least twice a week, but sometimes as often as every day) 5. Client Approval We work with the client until the app has been successfully released on the App Store. If needed, we can provide several small iterations for comparison. 6. Post-Production Support After release, we provide a 6 Month Quality Guarantee. If any issues were to arise during that time which fall within the scope of the project, our team will handle them.

    $33.33 /hr
    25 hours
    5.00
  9. Andrey Z.

    Andrey Z.

    Senior Windows system administrator. Exchange and Google Apps expert

    Russia - Last active: 6 days ago - Tests: 7

    Hi, my name is Andrey! 10 years of experience in IT Industry specially with Microsoft Techmologies. Quality service for Microsoft OFFICE 365, EXCHANGE SERVER 2007/10/13, WINDOWS SERVER 2003/08/12, client OS: WINDOWS XP/7/8/8.1 I'm A professional with broad experience in the design, implementation, operation and management of infrastructure solutions looking to expand my skill and challenge myself. i am looking forward to assist you and providing you with a world-class experience. Technologies: Office 365 (Exchange, Sharepoint, Lync) MS Windows Server 2003/2008/2012 MS Exchange Server 2003/2007/2010/2013 Antivirus defend: Kaspersky, ESET, Symantec Hardware PBX: Panasonic Cisco, Fortigate, Dlink, Checkpoint DNS Server MAC OS Citrix XenServer, Microsoft Hyper-V, Vmware MSSQL, MySQL Backups - Symantec, Veeam,Acronis Web Hosting and reselling Clouding Infrastructure planning and development Help Desk and support My certificates: MCSA+M (Microsoft Certified Systems Administrator + Messaging) Microsoft® Certified Technology Specialist: - Windows Server 2008 R2, Server Virtualization - Microsoft Forefront Client and Server - Microsoft Internet Security and Acceleration (ISA) Server 2006 - Windows Server Virtualization - System Center Virtual Machine Manager 2008 - Windows Small Business Server Microsoft Certified Dynamics Specialist I've been involved in various maintenance and/or implementation projects based on technologies mentioned above. I have also participated to network design and implementations projects as well as assisting customers migrating to the latest technologies. I believe my strong points are my Creativeness and Punctuality. My #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. I'm honest and fair.

    $33.33 /hr
    99 hours
    4.99
  10. Nasrajan J.

    Nasrajan J.

    PHP Expert , Project Management Consultant

    India - Last active: 16 days ago - Tests: 10 - Portfolio: 13

    I am Zend Certified PHP 5 Engineer. Over the last 12 years, I have developed and administered websites using LAMP technologies and tools including - xHTML, HTML5, JavaScript, CSS, Ajax, MySQL, PostgreSQL in platforms like UNIX, Linux and Mac OS X. I am passionate about open source and am familiar with a large number of open source software and technologies. My core competency lies in understanding the goals of the website in detail and converting it to a full- fledged cost-effective product with faster turn-around time. I also have the following skill sets. Expert in Search Engine Optimization. Strong in Object-Oriented Analysis, Design & Programming and technical documentation in Unified Modeling Language (UML). Strong Linux system administration skills, especially LAMP administration and troubleshooting. Experience working in agile environment. Strong project management skills and leadership abilities.

    Groups: Zend Certified Engineers

    $30.00 /hr
    3,769 hours
    5.00