Top Upwork Freelancers

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  1. Clark Alesna

    Clark Alesna

    Software / Web Developer

    Philippines - Last active: 12 hours ago - Tests: 8 - Portfolio: 7

    IT enthusiast that has interest for the newest and latest technologies available. I am a multi-paradigm programmer. And I can code web application in PHP,Javascript,HTML or in native applications development like C#/.NET,C/C++,Objective C. I am also exprienced in Linux,Mac OSX and Windows. Currently I love WinRT in Windows 8 , Javascript , NodeJS and HTML5 I am also studying system/application penetration and hacking.

    Groups: Application Developers Alliance, Crossrider

    $22.22 /hr
    2,432 hours
    4.84
  2. Mykhaylo Dobrovolskyy

    Mykhaylo Dobrovolskyy

    Mykhaylo Dobrovolskyy

    Netherlands - Last active: 2 days ago - Tests: 7

    10+ years of Linux/Network experience with different systems. Finished and delivered SMB solutions to big corporate companies lie BNP Paribas, ABN AMRO or RBS. My main areas of knowledge are: 1) Networking (Cisco/Juniper/F5/BlueCoat and Linux/FreeBSD based solutions like vyatta/pfsense etc) 2) Security - Cisco IPS/IDS, CheckPoint, Linux/FreeBSD based, Juniper etc 3) Linux administration - mail system, database (mysql/mysql cluster), server with high load average, load balancers for server farms (Cisco/F5 based and Linux based like keepalived or apache/nginx with reverse proxy) 4) VoIP - Cisco/OpenSource(Asterisk and different installations based on asterisks like freepbx/elastix etc) There is a very small piece of my knowledge, I'm always looking for opportunity to grow and I'm pretty sure that if you give me tasks - I'll find out best way howto get it done.

    $27.78 /hr
    4,749 hours
    5.00
  3. Piotr C.

    Piotr C.

    Experienced web developer (Python, Postgres, Unix)

    Poland - Last active: 4 days ago - Tests: 5

    Experienced web developer and unix administrator. My best skills include: * good team communication and project management * agile web development using Python and relational databases * deep knlowledge of web applications security * freeride snowboarding ;-) * RESTful and SOAP webservices * unix systems administration (FreeBSD and GNU/Linux) * profiling and optimization of applications

    $35.00 /hr
    1,870 hours
    5.00
  4. Vladimir Zotov

    Vladimir Zotov

    Asterisk|Network|Linux|AWS administrator, PHP|JS|HTML developer

    Russia - Last active: 1 month ago - Tests: 4

    I work in different IT areas for 9 years. I have advanced skills in network administration, helpdesk consulting, web-development. As network administrator I've builded and supported: - ISP network (routing,switching, billing, asterisk, DNS, Web-servers, email) - large company network (routing,switching, DNS, AD, Web-servers, email) Also I have advanced skills in AWS-infrastructure administration: - Amazon EC2 - Amazon S3 - Amazon Route 53 - Amazon Kinesis - Amazon VPC As web-developer I've created and supported web-sites and services on: - Joomla - Drupal - Bitrix - Yii - Moodle. Also, I'm Certified Cisco Networking Academy and Linux Professionl Institute instructor.

    $8.00 /hr
    27 hours
    4.99
  5. Yuliyan Tsvetkov

    Yuliyan Tsvetkov

    Advanced linux administrator and system automator

    Bulgaria - Last active: 6 days ago - Tests: 6 - Portfolio: 1

    In the world of 24/7 available services, giving to the customer best stable and optimized Linux environment is the primary role of every System Administrator, my role too. I've 5 years of experience in automation, installation and maintenance of Linux servers based on RHEL, CentOS, Fedora, Debian and Slackware distributions. Also I'm managing a lot of live servers for the biggest Telcos in the Middle east and Africa using new technologies, and also proven old ones.

    $22.22 /hr
    214 hours
    4.68
  6. Vladimir Mott

    Vladimir Mott

    Microsoft Exchange, Lync, & PowerShell Expert

    United States - Last active: 1 day ago - Tests: 3

    Ex-Microsoft Senior Consultant with 15 years industry experience designing, deploying, securing and managing Microsoft Exchange, Lync, and Active Directory. Deep experience with multi-site deployments, Exchange Database Availability Groups, Lync Enterprise Voice,and hybrid Microsoft Office 365 deployments with SSO. Complex migrations to/from Exchange, Lync, and Office 365 are my specialty. Very experienced with complex hybrid / coexistence scenarios that require directory synchronization, federation, and custom PowerShell scripting. Excellent communication and problem-solving skills. I am based in California, USA. Technical Skills: - Exchange 2003/2007/2010/2013 - Lync 2010/2013 with Enterprise Voice - PowerShell Scripting - Office 365 - Forefront Identity Manager (FIM) - Active Directory - Windows Server 2003/2008/2012 R2 - Hyper-V - ADSI, LDAP, DNS, SMTP, TCP/IP

    $75.00 /hr
    533 hours
    5.00
  7. Andrii Ivanskiy

    Andrii Ivanskiy

    Administrator,DevOps,IT specialist

    Ukraine - Last active: 1 day ago - Tests: 1 - Portfolio: 8

    I am IT specialist with over than 6 years of experience on Windows and OpenSource (Linux) based technologies. I have strong skills on networking, operations systems, network services and applications: - Operating Systems - Windows (Windows NT, 2000, 2003, 2008, 2008R2, 2012), Linux (CentOS, Fedora, Red Hat), FreeBSD - Networks - TCP/IP, routing, VPN, NAT, iptables - Infrastructure and services - Active Directory, DNS, DHCP, Exchange, Lync - Cloud computing - Microsoft Azure, AWS - Applications - SharePoint, SharePoint Online, Office 365 - Databases - MS SQL , MySQL - Virtualization - MS Hyper-V, Vmware, Virtual Box - Scripting - PowerShell, Bash - Internet Technologies and Programming - IIS, Apache, Nginx, HTML, CSS, PHP, C#, ASP.NET, MVC

    $22.22 /hr
    47 hours
    4.85
  8. Roland S.

    Roland S.

    PHP programmer experienced in Zend Framework, CMS

    Serbia - Last active: 10 days ago - Portfolio: 29

    I'm a web developer in Serbia with 6 years of experience in the industry. I was worked in older frameworks, but nowadays I work with Zend Framework on a large scale web applications. When i have free time i develop my Cms with Zend Framework which I use as a core in my projects.

    $20.00 /hr
    1,702 hours
    5.00
  9. John U.

    John U.

    Sqa, Black box testing

    United States - Last active: 1 day ago - Tests: 14 - Portfolio: 1

    Software and web app QA. With my nine years of Silicon Valley experience in QA with Netscape and America Online, whether you are a large or small company or a start-up, I can handle your QA needs, guiding your product to perfection. My present job of 8 hours per week since 2014, is with Web App Farm in Tampa. A native of San Jose, Ca, I am an expat living in Cali, Colombia, doing freelance QA work.

    $11.11 /hr
    3,137 hours
    4.98
  10. Julio Carvajal

    Julio Carvajal

    CCIE 42930,2xCCNP,Juniper Specialist

    Costa Rica - Last active: 1 day ago - Tests: 2 - Portfolio: 4

    Senior Network and Security engineer with more than 10 certifications from different vendors including a CCIE. As a Cisco TAC engineer I fixed over 2000 different issues on multiple platforms. Let me show you I am your network engineer. Certifications List: CompTIA Security+ CCNA JNCIA CCNA Sec CCNP Security CCNP Routing&Switching JNCIS-SEC CCIE Routing&Switching 42930 Languages: Spanish, English

    $77.78 /hr
    143 hours
    4.91