Network & System Administrators

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  1. Dexter N.

    Dexter N.

    12+ Years of System and Network Administration + Cloud Specialist

    Philippines - Last active: 10 hours ago - Tests: 7 - Portfolio: 4

    I'm a Freelancer focused on Amazon Web Services that works seamlessly with my technical skill set as an Expert Administrator on Windows and Linux(Ubuntu) Servers platforms. My Expertise includes: AWS (EC2, VPC, Route53, Glacier, S3, RDS, Cloudwatch and IAM) DigitalOcean and Linode Windows, Exchange and Zimbra Servers Linux Variants (Ubuntu, Debian and CentOS) VirtualBox, VMware Esx and Esxi MS-SQL, PostGre and MySQL Networking and Load Balancing LEMP, LAMP, WAMP, WIMP and MAMP Wordpress Moodle PHP

    $20.00 /hr
    474 hours
    4.82
  2. Musa Osmani

    Musa Osmani

    Linux System Administration Network administrator

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

    Over the last 14 years, I have developed a wide range of skills working in complex projects envolving Linux, Unix,Windows and Cisco Technology. Having experience in different fields helps me to effectivly complete and deliver projects from scratch or fix and troubleshoot complex issues in multi technology environment.I'm seeking for new projects but also i enjoy resolving complex problems in multitechnology environment. Below the list of my skils: Information technology: Operating System: Excellent knowledge Windows, XP,Windows7 (Client &server) Excellent knowledge of Linux: Red Hat,Fedora,Suse,Ubuntu(Client Server) Unix : HPUX, Solaris(Client e Server) Scripting Unix, Linux ,Windows. Programming Languages: Visual Basic (VB Script) C/C++ SQL Perl Bash IA 32 Assembler (AT&T and Intel syntax) Network Knowledge: Excellent knowledge (L.A.N) Installation, Maintenance, troubleshooting Network Appliance: Cisco Routers: 4400 3900 3800 2900 2800 1900 1800 800 1000V Cisco Switches: Nexus 7000,5000,2000,1000V Series Configuration of (VTP, Spanning Tree, VLAN, Private VLAN,VPC) Detailed knowledge of this routing protocols( RIP,IGRP,EIGRP,OSPF,BGP) MPLS: configuration of the core MPLS network for label distribution (TDP or LDP) And traffic engineering. Configuration of EDGE routers (CE,PE) for MPLS VPN Involving the exchange of different routing protocols for exchanging routes (OSPF,EIGRP,RIP,Static Routs) Very good knowledge of SNMP prothocol.Data collection from network nodes for performance and monitoring (CPU usage,interface status,interface load,CRC counters,Packet errors). Load balancing Technology: I have 3 years experience in BigIP load balancers.Configuration Virtual hosts, Pools,Nodes,Route domains,writing iRules for traffic customization, HTP and HTTPS profiles,Persistence profiles,proxy pass and reverse configuration,debug and troubleshooting Security: Cisco ASA 5520,5550,cisco IPS and IBM proventia IPS. Server Side Knowledge: 1.) Creation and maintenance of Windows domains (2003,2008) Active directory. Installation and config of network servers (DNS,Wins,Exchange,DHCP) Creation and management of domain accounts,groups,domain policy.. Installation and maintenance UNIX systems (SUN Solaris , HP UX) Installation and maintenance Linux Systems: (Fedora,Red Hat, Mandrake , Suse, Ubuntu) Shell & Bash Scripting.Istallation and configuration of cluster systems (Microsoft,Unix,Linux,) 2.) Excellent knowledge of MySQL server installation and configuration. 3.) Installation and configuration of web servers (IIS,Apache,Tomcat) 4.) Good knowledge of virtualization (Vmware,SolarisBox,XEN kernels)

    $30.00 /hr
    11 hours
    5.00
  3. Joey Washburn

    Joey Washburn

    Certified, Professional Systems Engineer - Windows - Exchange -Virtual

    United States - Last active: 1 month ago - Tests: 7 - Portfolio: 3

    Exchange Migrations/Upgrades/Troubleshooting Windows Migrations/Upgrades/Troubleshooting VMware Deployments/Planning/Migrations/Upgrades F5 Deployments System Center Operations Manager Windows Server 2008 R2 Windows Server 2012 R2 EMC Backups As a Microsoft Certified engineer since 1999, I have provided support for companies of all sizes. Throughout my career, I have helped clients support Microsoft Windows NT 4.0, 2000, 2003, 2008 and 2008R2 along with many of the software and services that run on Windows including IIS, SQL, Exchange and more. I have held several certifications over the years from Microsoft, Citrix, Cisco and Novell. I am currently a VMWare Certified Professional and a Microsoft Certified Technology Specialist.

    Groups: Microsoft Certified Professionals

    $70.00 /hr
    165 hours
    4.88
  4. Ovi I.

    Ovi I.

    Highly Experienced Developer

    Austria - Last active: 3 days ago - Tests: 29 - Portfolio: 6

    > WHO IS THIS GUY? < 27 years old passionate developer, with more than 8 years experience in web development. > WHAT CAN I GET FROM HIM? < You will always get high quality work from me if we work together, no excuses. - consultancy - coding frontend UI - developing custom backend - complete solutions based on Drupal, Wordpress or custom platform - web apps (AngularJS) - fixing bugs - performance optimization - server administration (LAMP, Amazon Web Services) - all sort of scripts (web scrapers, data analysis/conversion etc.) - other custom coding (I accept challenges!) > WHY DOES HE DO THIS? < I am passionate about what I do and I feel this is helping me learn and grasp the new trends in the web industry much faster compared to others that just 'do their job'. I take pride in what I do and don't accept compromises when it comes to high quality work. > NEED MORE INFO! < Feel free to contact me regarding any question you might have. I usually respond within 24 hours or less.

    Groups: Upwork Verified Web Developers

    $44.44 /hr
    858 hours
    4.99
  5. Aldrin L.

    Aldrin L.

    Architect, Backend Engineer (Scala, Java, Hadoop)

    Brazil - Last active: 16 days ago - Tests: 12 - Portfolio: 1

    Over the past 15 years I've worked with projects ranging from Startups to Fortune 100s. From C++ to Scala, past assignments involved: - Protocol Design in C++/Delphi - Java API Publishing - Maven Plugin Development - Distributed Systems using RESTful backends - Scala / Akka Design - Jenkins Plugins Writing On a daily basis, I spend between Systems Architecture, Build Planning, for Hadoop and Restful Backends, specially under Amazon Web Services. Oh, I'm also a Cloudera Certified Administrator and Developer. Favorite platforms include Scala, Python and General Java. See my full profile for more descriptions and feel free to browse my github and bitbucket profiles at the addresses below: http://github.com/ingenieux http://bitbucket.org/aldrinleal Favourite customers involve pragmatic teams, with contant online presence, and direct involvement with the end customer, and a problem involving legacy and the next generation Feel free to discuss our next project - I'm always looking for the next challenge!

    Groups: LoginRadius, Microsoft Certified Professionals

    $55.56 /hr
    3,109 hours
    4.83
  6. Marcin Bogus

    Marcin Bogus

    Software Developer

    Poland - Last active: 1 month ago - Tests: 1

    Over the last 3 years, I have developed a wide range of websites using Html/Html5, CSS, PHP5, JS 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.

    $48.89 /hr
    418 hours
    5.00
  7. Anton T.

    Anton T.

    MODx Developer / PHP / MySQL / JS / Linux

    Russia - Last active: 1 day ago - Tests: 9 - Portfolio: 22

    MODx Revo/Evo developer. Over the last 9 years of working in web developing industry. I have experienced as team working (including team leader position) as well as independent freelancer. Now scope of my professional interests range from light-weight web sites to highload portals and startups. In recent years I'm developing sites mostly based on MODx CMS/CMF, but i also worked with other frameworks: Zend Framework, osCommerce, UMI.CMS, Bitrix, WordPress, Joomla and about 3-5 self-made nameless CMS. Also I have strong expirience in integration of 3rd party applications, payment systems API (Card gateways, PayPal, SMS gateways, WebMoney, Yandex.Money, RBK.Money, Money[at]Mail.ru, Qiwi), websites optimization (according to GTmetrix and Google Page Speed Test). In addition, I possess high-quality 2 years expertise in software and web testing. At your service!

    Groups: Upwork Verified Web Developers

    $33.33 /hr
    1,251 hours
    4.98
  8. Dan C.

    Dan C.

    Expert PHP/JavaScript developer & AWS solutions architect

    Romania - Last active: 10 hours ago - Tests: 13 - Portfolio: 2

    I am a full stack software engineer specialized in building PHP / JavaScript based web applications. I'm also focused on cloud computing, more specifically on AWS (Amazon Web Services). In my experience in software development, I have played a key role in planning, architecting, building, releasing & maintaining software products. In 2012, I cofounded Sitedity, a start-up based in Brasov, Romania that provides a website creation platform for small businesses and individuals (SaaS). Here are some of the technologies that I'm focusing on: PHP / JavaScript / CoffeeScript / HTML5 / CSS3 / RDBMSs (MySQL, PostgreSQL, SQLite, etc.) / NoSQL DBs (Redis, MongoDB, etc.) AWS / EC2 / S3 / CloudFront / DynamoDB / SimpleDB / RDS / CloudFormation

    $60.00 /hr
    1,136 hours
    5.00
  9. Long Doan

    Long Doan

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

    Vietnam - Last active: 1 day ago - Tests: 2 - Portfolio: 5

    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 goal and 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 using Angular JS 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

    $33.33 /hr
    563 hours
    5.00