Top Upwork Freelancers

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  1. Ivan P.

    Freelance C# developer

    Belarus - Tests: 1

    Hello! I am a freelance C# programmer from Belarus. I have 5 years of experience in making different software for social networks (facebook, vk.com, youtube), for automatic account registration on various websites, for data parsing, and other. I create desktop applications using WPF or Windows Forms, applications with web interface, and console applications. Skills: C#, WPF, Windows Forms, HTML, CSS, SQL

    $10.00 /hr
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  2. Ilia M.

    Cryptography Expert

    Russia

    Expert C/C++ developer. I also have experience with C# and Java Expert cryptography engener. I implements AES, DES, SHA-1, SHA-2, DH, RSA. I have experience with PKCS#11, MS CAPI, CNG, JCA. I have experience working with smart cards. Winscard library. Java card applets. I have experience working with public key infrastructure.

    $27.78 /hr
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  3. Evgeny Frolov

    Java Developer

    Poland - Tests: 3

    About 3 years experience as developer. This experience include Java, Node.js, CoffeeScript, CSS, etc. technologies. Also have worked as a System Administrator of Linux servers. Mostly, it is developing different online stores, simple sites for companies, crm systems. Now I am studying in Warsaw, on Software Engineering speciality (English program).

    $6.00 /hr
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  4. Harpreet K.

    Mobile App | iphone | Android Expert

    United States - Portfolio: 5

    I'm a software engineer based in US, I am your full-stack Android, and iOS native developer. I have built a startup app from A-Z and know it all the way. If you want to have your App built, I can help you make it happen! I'm always after the simplest solution that deliver value to the business. I am open and available for every long-term business relationship opportunity. Strong grip in developing below listed domain's app : ------------------------------------------------------- 1) Photo Editing app (iOS, Android) 2) Traveling App (iOS, Android) 3) Food and Beverages App (iOS, Android) 4) Social Media App (iOS, Android) 5) Dating App (iOS, Android) 6) Social Networking (iOS, Android) 7) Utility/E-commerce App (iOS, Android) 8) Real Estate App (iOS, Android) I create a project plan for every project and I always keep the client up to date with the project progress. I have the knowledge to build an app from the ground up and to submit it to the Appstore. My work is a synonym for quality !!!

    $33.33 /hr
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  5. Robert Brown

    Senior Android Developer

    United States - Portfolio: 2

    I've been working with Android professionally since 2.1 (over 4 years). I was one of the primarily developers of SAS Mobile BI https://play.google.com/store/apps/details?id=com.sas.android.bimobile And THE primary developer of SAS Folders: https://play.google.com/store/apps/details?id=com.sas.android.folders I have a degree in mathematics so I can handle any scientific or mathematical Android app you care to throw my way. My skills currently are only in Android development, not iOS, but my Android skills are exceptional.

    $50.00 /hr
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  6. Kresimir Sivoncik

    Software engineer

    Croatia - Tests: 1

    Software engineer SmartRM, Inc. October 2011 – September 2013 (2 years)Zagreb Transition from proof-of-the-concept to usable product for document access protection (please, see www.smartrm.com for details). Concept uses MPEG-21 protocol and its public domain implementation libraries, MXM (on client side) and Chillout (on server side) as core. Tasks performed include - partial code refactoring of both client side and server side. - implementation of user interface on client side, - design / implementation of communication protocols for informations not covered by core MPEG-21. - implementation of user web access to the data stored on server (known as web-console, application separate from server) - port of client from MS-Windows to Mac OS X (and writing necessary patches for different libraries) Tools and languages: - client C/C++, Qt, and on Mac OS X systems part had to be using Cocoa, Axis2C - server java 1.6, SpringFramework, Hibernate 3, Mule ESB 2, Axis2/REST - webconsole RubyOnRails 3.2, REST Software engineer Sinapsi May 2011 – June 2011 (2 months)Zagreb Arhcitecture and implementation of data exchange protocol via XBRL defined structure. A simple state machine with simple grammar was enough to produce compact engine to transfer data from database into XML, this way entirely escaping JAXB which was initial idea of customer. Work was completed in two weeks. The rest of the engagement was support for run-in of the library. Language: Java 1.6 Software Engineer Sinapsi July 2007 – March 2009 (1 year 9 months) Event Management System for Novartis Spa. Milan, Italy : Oracle DB, BEA 8 web server, Struts 1.1, Spring Framework 2.5, Hibernate 3 - architecture & implementation of entire system (Jan. 2008 - March 2009) Shopping Cart backend for Feltrinelli Spa, Milan, Italy: MS SQL, Spring Framework 2.5, Hibernate 3, Velocity, Mule. Shopping cart module communicated with 5 external systems (run by different companies): procurement, sales, logistics, credit card company, web front end. This required to provide communication via various technologies (flat file fixed record, SOAP, RPC, proprietary protocols) - architecture & implementation of entire DB and business logic, partially of communication protocols (July 2007 - Dec. 2007) RA at Institute for Simulation and Training at University of Central Florida Orlando, FL, US Institute for Simulation & Traninig August 2006 – January 2007 (6 months) Port of existing crowd simulation application (single thread) to computer cluster, and locating existing implementation bottlenecks. Pure Java. (Sept.2006 - Jan.2007) Implementation of tool to assist conversion of raw video data into crowd motion tracking data (idea and implementation), JMF, August 2006 Software Engineer 3 Cplane January 2000 – December 2002 (3 years) Network traffic optimization software development. Responsible for implemetation of - Graphical User Interface Framework for interfacing set of applications like Traffic Conditioning, Traffic Engineering, Network Engineering, Bandwidth Management, Service Activation. Framework written in Java, graphical library Swing. Configuration / management of the framework done via extensible set of parameters stored in XML files. - Implementation of Traffic Conditioning, Bandwidth Management, Network Engineering, partially Traffic Engineering in layers above network device specifics (J2EE Beans). Software Engineer iOwn.com May 1999 – December 2000 (1 year 8 months) Development and maintenance ISAPI DLLs in C++ for an online mortgage broker. Responsible for all the applications on the real-estate portion of the website, including a property valuation tool, a property listing search, and various calculators (external web site). Architectural redesign, design & development of set of applications for data maintenace & exchange based on WEB paradigm (internal web site). Software Engineer Cromerica Technologies March 1998 – April 1999 (1 year 2 months) Implementation of ITU T.120-T.126 (Multipoint Data Conferencing and Real Time Communication Protocols) standard series (including implemetation of required supporting X.690 X.691 protocols). Work done in platform independent C++ format. Entire development (beta version of server) took only eight months, facilitated by use of custom made code generators and features of Rational Rose

    $11.11 /hr
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  7. Philip Crowder

    Microsoft Certified Developer and Infrastructure Engineer

    United Kingdom - Tests: 4

    I am an IT professional with 15 years experience within the IT industry, I am a Microsoft certified software developer as well as a Microsoft Certified Infrastructure engineer. I aim to be as successful as possible in my field and feel that my experience as both an IT manager and software developer give me the required skills to be one of the more useful freelancers when it comes to development of bespoke solutions.

    $60.00 /hr
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  8. Sergiy Rumyantsev

    Data Scientist, programmer C#, Java, Python, Ruby, Matlab

    Ukraine

    2013–Today GF Systems: Physicist, Programmer Java, C#, Python, Ruby, Haskel, Matlab. 2010 – 2013. JFC Rostok Company. CAD programmer, Data Scientist​ (Python, Java, C#) 2006 – 2010: Institute of materials of electronic techniques: Data Scientist (Java, C#,Python) 2004 – 2006 Joint-Stock Companies "Pillar" technologist, programmer (C++,SQL). 2001–2003 University of Tarasa Shevchenko: the Teacher for students of 1-2 rates.

    $22.22 /hr
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  9. Petar Srdanovic

    Microsoft Certified Technology Specialist

    Serbia

    I am a Microsoft Certified Technology Specialist and Penetration Tester.Over the last 5 years, I have developed a wide range of desktop application using Windows Forms,WPF,WCF,MSSQL,LINQtoSQL and LINQtoENTITIES and websites using HTML, ASP.NET,MVC2,3,4 ,C# and MSSQL including sites for startup companies and small businesses. Penetration testing to do in spare time and I am very good at it,I got a couple of awards for my work from large companies like Belgrade Chamber of Commerce,e base,aleva...

    $5.56 /hr
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  10. Bojan Gavrilovic

    Programmer

    Serbia

    I've started working originally with programming languages Basic, Fortran, Pascal, and C++. However, from the mid 1990s, I've decided to focus solely on Delphi and C++ Delphi versions that I'm using are Delphi 5-Delphi xe7. I have a lot of experience in VCL programming, including multithreading and component developing. In addition to that, I also have experience in creating windows drivers by using WinDDK and C ++. I use UML when developing software - ModelMaker or StarUML. I know quite well internet protocols and OpenGL. In the past, I worked on developing passthru drivers, process, thread, image monitoring, virtual printer...

    $20.00 /hr
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