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Network Security Upwork freelancers typically receive a client rating of 4.75.

Last updated: October 1, 2015
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Roney B.

Roney B. Agency Contractor

Solution Architect for mobile, web based and SAP applications

India - Tests: 5 - Portfolio: 2

I am a Solution Architect with entrepreneurial skills. My skill sets are around niche technology areas and I particularly expertise in solving complex solutions (technology and business) and solve bottlenecks for business. I have worked with SAP for almost 10 years and have lanscaped, designed and perfected heterogenous systems and Enterprise Application Integration. Identity Management, HANA is one more area where I excel. Allow me to serve your technology needs and boost your business. My expertise in relevance to the current technology suites run around various Java Script Frameworks, web applications, REST API, OAuth, Rails, Java/J2EE, CakePHP, etc.

Associated with: Vertmac Technologies LLP Agency

$70.00 /hr
1,651 hours

Bernard Leigh

Bernard Leigh

Director of Professional Services, Consulting and Program Management

Cyprus - Tests: 7 - Portfolio: 4

Demonstrable skills and experience in both Enterprise and SME (MSP Clients) Project and Programme Management, based on the principles and methodologies of industry standards such as PRINCE 2 and PMP. With further demonstrable experience of managing teams in excess of 30 members including local hire and remote resources, together with all aspects of annual performance appraisals, and contractor negotiation, with an excellent understanding of the latest ITIL methodologies for ITSM. This specific experience has been gained from over 10 years of managing distributed teams and environments across multiple time zones and cultural forums, through Application and Infrastructure Support and Project and Change Management to have a complete understanding of the both SDLC and ITSM and how to make them successfully coexist. I have developed and managed enterprise grad SLA’s, OLA’s, UC’s and KPI’s framework, for both internal IT staff and external supplier resources to meet with industry and global regulatory requirements. Responsible for ALL Sarbanes Oxley (SOX) reporting and owner of ALL SOX controls for UK. I have a professional, adaptable, and competent approach to both Resource and Stakeholder management. I am more than comfortable with working in an integrated IT environment or as a consultant. I have a strong mix of corporate enterprise, SME and entrepreneurial experience, and to expand on that, my experience has afforded me the ability to learn the complex matrix management structures and business models which predominantly gained within Global Financial Services Industries (Investment Banking and Global, Corporate and Specialty Insurance). Where conversely some of my most recent and earlier career experience was based in one of the most competitive customer service industries, and to achieve success in this, I had to be flexible to market conditions, so that I could maintain strategic focus so as to continually meet my financial targets. The combination of my career experience has provided me with the opportunities of working in USA, Belgium, France, Spain, Gibraltar, Abu Dhabi and secondments to Brazil, Mexico and APAC, for projects that I was either managing or transferring to local piers and latterly I had responsibilities for USA, Germany, Italy, Switzerland and Denmark. I am confident that I have a strong comprehension of global business environments and managing diverse IT Departments across a multicultural platform. I feel that I am confident and excellent communicator and am completely at ease with interacting and influencing piers, partners, subordinates and executive management, both internally and externally to my working environment. Throughout my career, I have remained technically competent, complemented by my training and experience with Prince 2 and ITIL methodologies. I am a strong communicator, who is confident and experienced in influencing business and IT stakeholders-up to and including-CIO/Managing Director Level.

100% Job Success
$60.00 /hr
7,951 hours

Vladislav M.

Vladislav M.

Cloud Expert / AWS / DevOps / Linux System Admin / Cisco

Malaysia - Tests: 10

Self-motivated professional with strong work ethic and productive self-starter – proven with success being a freelancer at oDesk. Team player - Participated in multiple projects, joining large teams, effectively co-working with other professionals Effective leader - Took over leadership and managed team resources to achieve goals meeting deadlines 17+ years as an Systems Administrator 11+ years as Network Engineer 7+ years as Cloud Expert and SaaS Architect 3+ years @ DevOps Freelancer for last 8 years (over 30,000hrs worked @oDesk)

98% Job Success
$60.00 /hr
41,252 hours

Stamatis Kekes

Stamatis Kekes

Senior system administrator and PHP - C - Perl developer

Greece - Tests: 11 - Portfolio: 2

Very skilled Unix system administrator, with lot of experience in Linux ( Centos, Redhat, Fedora, Ubuntu, Debian, Gentoo, Slackware ), Solaris, xBSD ( FreeBSD, OpenBSD), vpn ( openswan - ipsec, openvpn, l2tp, pptp ), clustering ( LInux Virtual Server, Linux HA, vrrp, Solaris Cluster ), cloud computing, load balancing ( f5, haproxy ), VoIP ( asterisk ), databases ( MySQL, PostgreSQL), LDAP, web services ( Apache, Nginx, varnish ), security ( penetration testing, firewall policy design ), control panels ( CPanel, Plesk, Virtualmin, Ensim ), Virtualization ( VMWare Virtual infrastructure - VSphere, amazon EC2 ). As for Developing I am very experienced in C, PHP, Perl, javascript, ajax and many more to list.

98% Job Success
$16.67 /hr
1,838 hours

Robert K.

Robert K. Agency Contractor

PHP Developer

Poland - Tests: 3 - Portfolio: 5

I`m a programmer with five years of experience in software development. I have created a wide range of websites using PHP, JavaScript and MySQL including one's for start up companies like social portals,content management systems and small businesses especially dealing with INTRANET & EXTRANET. I also have gained considerable experience in the following: PHP, SQL, Ajax, OOP, MemCached, Linux. Most of my projects were created using Agile / Scrum methodology in short iterations (2 weeks). I am always open to furthering my programming skills and learning about new frameworks, API's and other tools In essence, I provide high quality code, perfect feedback and above all value the client's needs and requirements.

Associated with: Polcode

94% Job Success
$36.00 /hr
6,766 hours

Glenn Chen

Glenn Chen

Software Developer

United States - Tests: 5 - Portfolio: 13

Please let me know how I can contribute to your team. Have a wonderful day! - Python/Django - C++/Qt - Git/Mercurial - Code - Blog - Computer Science degree - Fujifilm e-system Photo Kiosk - sample work? feel free to check my portfolio pieces

$35.00 /hr
1,698 hours

Sergey Zinchenko

Sergey Zinchenko Agency Contractor

Senior iOS, Android and Delphi developer. Software Engineer.

Russia - Tests: 8 - Portfolio: 12

I am from Rostov-on-Don, Russia. I have a diploma in mechanics, mathematics, and Computer-science, as well as 4 years of full life cycle software design, development and maintenance. My experience makes me an expert in Objective-C, iOS SDK, Java, Android SDK, Node.js, Javascript, HTML, CSS, Delphi and best practices. I able to jump into any project to fulfill any unexpected vacancy to drive the project to completion on time and within the budget. Over the past few years, I have successfully developed and published many applications for Apple Appstore and Google Play. This illustrates my performance, responsibility, and the high level of interest. Separately, I would like to give a list of names of known things that I well know how to use: ✔ Objective-C, ARC, Cocoa Touch, Foundation Kit Framework, UIKit Framework, iAd Framework, MapKit Framework ✔ CoreData Framework, SQLite, SQL ✔ AVFoundation, OpenGL, OpenAL ✔ CFNetwork, HTTP, SOAP, JSON, XML, REST, TCP/IP, UDP, SSL ✔ CoreLocation, Push notifications, Zlib, threading. Now I'm ready to turn your ideas into great mobile apps and to find a long-term partnership. Please contact me if you are interested.

Groups: Application Developers Alliance

Associated with: S Media Link

85% Job Success
$25.00 /hr
2,319 hours

Jose S.

Jose S. Agency Contractor

MCITP | VCP | BCSA | ITIL | ISO 20000 | ISO 27002

Philippines - Tests: 5 - Portfolio: 5

"Teamwork is the ability to work together toward a common vision. It is the fuel that allows common people to attain uncommon results."

Groups: Microsoft Certified Professionals

Associated with: StuxNet Career Solutions

100% Job Success
$15.00 /hr
3,441 hours

Pavels J.

Pavels J.

Highly skilled C/C++/Linux server-side developer

Spain - Portfolio: 1

Highly skilled C / C++ / Python server-side developer, with over 12 years experience. My area of interests is in developing high-available, multi-threaded, high-performance Linux network applications. I'm the lead developer, maintainer and the active participant of several popular OpenSource projects.

100% Job Success
$60.00 /hr
2,470 hours