Top Upwork Freelancers

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  1. David Martens

    David Martens

    Security and network R&D engineer

    Belgium - Last active: 08/31/2014 - Tests: 2

    Security Experience (CISSP and GPEN certified): Defense in depth, Architectural design, 802.1x network access, PKI, digital certificates, Wi-Fi security, Web and Network Penetration testing, Vulnerability assessment, Firewall configuration, OpenVPN Network Experience (CCNA certified): Specialized in designing and implementing LAN setups with focus on advanced switching and routing of IP video multicast streams. Experience with Cisco and Extreme Networks equipment. Project Management: Jira Agile General Experience: Debian Linux, Gstreamer, Multimedia streaming

    $38.89 /hr
    0 hours
  2. Serge P.

    Serge P.

    Systems Architect

    Belgium - Last active: 12/03/2014

    I'm a polyvalent IT project finisher, started 30 years ago as a programmer, functional analyst, systemengineer, DBA, system projectleader, systemarchitect, IT manager. Ten years industrial American multinationals, 20 years Europe banking. Projectleader that can get your job done. I can communicate (technical and functional) with all flavours of IT consultants. some of my skills Mainframe experience : IBM MAINFRAME VM MVS JCL REXX APL IDMS ADS OLQ CULPRIT ProgramLanguages: VB.NET, ASSEMBLER, PASCAL, FORTRAN, COBOL, IDMS-ADS, POWERBUILDER, PERL, VBSCRIPT Databases: ORACLE, SQL SERVER, IDMS Middleware : SONIC MQ, REMOTEWARE OS : VM CMS MVS Windows, VMWARE Microsoft: AD, HYPER-V, AZURE, SQLSERVER, IIS, RDP SERVER, ... Functions: Systemengineer, projectleader, functional analyst, IT Manager, SystemArchitect Thinclient: Terminal services, Citrix, Thinprint Virtualisation: HYPER-V, VMWARE Iaas: MS AZURE, AWS

    $50.00 /hr
    0 hours


    Software developer

    Russia - Last active: 02/11/2014 - Tests: 2 - Portfolio: 1

    I have 2+ years of experience in industrial programming. Over the past years I was involved in developing of a large-scale application, using a wide variety of technologies, mostly based on .NET Framework (I described it in more detail in the "jobs" section). My primary language is C#. I have a good experience in using MSSQL Server, dealing with .NET technologies, such as WPF, WCF and Entity Framework. I have quite good algorithmic and mathematical basis, knowledge of OOP and design patterns, a lot of motivation and enthusiasm. If you are looking for an energetic person, ready to solve you problems, why not to try me?

    $11.11 /hr
    0 hours
  4. David Szabo

    David Szabo

    Software Engineer

    Hungary - Last active: 08/21/2013 - Tests: 3

    Over the last 3 years I participated in both product development and client specific projects, using a wide range of technologies. Through these years my tasks mostly consisted of implementation of various functionalities in application, but I also have experience in testing and technical document writing. I am comfortable deeveloping in C++ and Java using related technologies but I also have experience using SQL, C#, Python, JavaScript. In my fee time I like to do small game development projects using new tools each time. I have used Unity, libGDX, cocos-2dx, Unreal Engine 4, SDL2, SFML so far.

    $6.67 /hr
    0 hours
  5. Grigoriy Volochiy

    Grigoriy Volochiy

    C#/ASP.Net MVC 5 | PHP/Wordpress | HTML | CSS | JavaScript

    Ukraine - Last active: 3 months ago - Tests: 1

    I am developer with over 3 years of experience in web development. I like to work on interesting and unconventional projects. I can create themes and plugins for WordPress and change existing themes by applying child themes. I am responsible for each project. I have a good skills in: - C# / ASP.Net MVC 5; - PHP / WordPress; - CSS / Bootstrap; - JavaScript / jQuery / Cycle2; - HTML; - MySQL administrating.

    $15.00 /hr
    0 hours
  6. Guillermo Fariña

    Guillermo Fariña

    System Administrator / Web Developer

    Spain - Last active: 06/13/2014 - Tests: 1

    More than 10 years of experience developing PHP software and as system administrator for hosting servers. Expertise: As a system administrator: Linux: RedHat/CentOS, Debian/Ubuntu, Amazon Web Services (AWS), installation, configuration, hardening. Site migrations, Apache/Nginx/Varnish/MySQL optimizations, Cpanel/Plesk management. As a web developer: Languages: PHP, Java, Javascript. MVC framewoks: Code Igniter, Kohana, Laravel. CMS customization and optimization: Wordpress, Drupal, Joomla, Magento. Tools: Mercurial/Git, Eclipse. Please take a look to my ranking and the feedback from my clients.

    $27.78 /hr
    0 hours
  7. Roberto Morati Junior

    Roberto Morati Junior

    Masters degree in Computer Science

    Brazil - Last active: 10/20/2014 - Portfolio: 1

    I hava a masters degree in Computer Science at UFES (Federal University of Espírito Santo, Brazil) and, also graduated in this area. I am an Oracle Certified Professional (OCP) in Java SE. I consider myself as a technology agnostic. In other words, I believe in the use of different technologies in order to solve different problems. In the last years, I have developed software mostly based on Java, C/C++, Python and, constantly, I trying to learn new languages and frameworks. Along this years I got experience with differents areas: Model Driven Development, Model Transformation, Ontology, System Interoperability, Augmented Reality, Natural Interface (Leap Motion SDK), Locative Games, Decision Making and Web. Nowadays, I work with computer science and healthcare to provides teleconsulting and other services to the primary health care network. Personal Site:

    $20.00 /hr
    0 hours
  8. Alexey V.

    Alexey V.

    Software developer & architect

    Russia - Last active: 6 months ago - Tests: 3

    My name is Alexey and I am a software developer with 15 years of experience. I was working on several big-data projects, natural language processing libraries, large tasks related to data mining, infrastructure, and many more. I am ready to create new or improve existing software of any reasonable complexity under any deadline conditions.

    $22.22 /hr
    0 hours
  9. Marcin Rydz

    Marcin Rydz

    Oracle Professional

    Poland - Last active: 6 months ago - Tests: 1

    An Oracle professional with experience acquired during a wide range of projects in Banking, Insurance, Retail and Geodesy industries; Eight years of experience in analysis, design and implementation of IT solutions based on Oracle technologies and products: Oracle RDBMS 11g/10g/9i, SQL, PL/SQL, Oracle Forms/Reports, BI Publisher, E-Business Suite 11i, FlexCube 10, Oracle Retail; A solid background in the database and application performance tuning, database architecture design and solutions for data warehousing and ETL processes; Extensive experience in delivering comprehensive solutions for business – beginning with analysis and design through application programming and finishing with end-user trainings; A good learner, well-organized and committed enthusiast of Oracle technologies, particularly interested in ETL processes, data warehousing and business intelligence; Job type: Contract Contact: LinkedIn: Certificates: Oracle Database SQL Certified Expert Oracle PL/SQL Developer Certified Professional Oracle Database 11g Administrator Certified Professional Specialties: • Oracle SQL, analytical SQL, PL/SQL, BI Publisher, Oracle Forms/Reports, Oracle XML, Oracle APEX • Oracle Data Warehousing, OLAP, ETL, Business Intelligence • Oracle RDBMS 9i/10g/11g administration, performance tuning, SQL and PL/SQL tuning • Oracle e-Business Suite 11i/R12 customizations: AP, AR, FA, PO, GL, OM • Oracle Customer Care & Billing • Oracle FlexCube Core and Direct Banking: CASA, IC, PC, FT, CL, EOC • UML, Enterprise Architect, Agile, JIRA, Mercury Quality Center, Mantis • SQL Developer, PL/SQL Developer, TOAD, SVN, CVS • Linux(Red Hat, OEL), Windows, Unix(Aix, Solaris)

    $50.00 /hr
    0 hours
  10. Ignacio Jorge

    Ignacio Jorge

    Senior .NET C# developer

    Ukraine - Last active: 06/17/2014

    Senior software developer and system architect with +15 years in the full cycle of software development in a wide range of industries. • Object oriented design: Expert knowledge in designing loosely coupled architectures to enable team members to work simultaneously in agile environments. S.O.L.I.D. development principles, dependency management/inversion. • OOP/OOD mentoring: Raising the team knowledge through internal cross-team teaching and code-review of younger developers in OOD techniques, design patterns, loosely coupled code and good practices. • .NET 2.0 - 4.0 (C#) Programming - Service oriented architecture (SOA). Webservices. (WCF/WebApi). SOAP/REST/Queues. Protobuf-net. Data compression/optimization. Windows sockets. MSMQ/RabbitMQ/ZeroMQ. - Client development/User interface design: WPF-MVVM, Winforms, ASP MVC 4, DevExpress components. - Relational databases (MS SQL 2000/2005/2008). ADO.NET, Entity framework, NHibernate. - Ethernet custom drivers development. WinPCap, multicast PGM. - IoC containers: AutoFac, Unity. - ClickOnce deployment and .msi packages. - Unit testing (NUnit/MsTest/MOQ/NCover). - Agile methodologies (Scrum, XP). Atlassian Jira project/ TFS environment. - Source controls: SVN, TFS. Continuous integration. • Future and stock trading domain knowledge: Very good understanding of market principles and dynamics (Futures and stock trading, e-minis, DAX). Strategy developing. Backtest analysis of massive amounts of historical and realtime transactional data. Processing and data retrieving optimization. Zenfire API, Ninjatrader and Metatrader. VolFix.Net analysis. • Embedded controller programmer: 10+ years expertise in system design in a broad-based industrial automation in Oil & Gas, energy distribution, automotive, etc. C language, Ladder, Structured text, Controllers from Schneider Electric, Allen Bradley, Siemens.

    $27.78 /hr
    0 hours