Top Upwork Freelancers

Clear all filters
  1. Timothy J Hays

    Timothy J Hays

    Sr. Software Developer

    United States - Last active: 1 month ago

    Tim Hays has experience developing over 80 published products in the areas of games, education, training, science, defense, and is a cognitive scientist as an advanced artificial intelligence expert and a published senior member of the IEEE with 2 patents awarded, both relating to AI design and display of intelligent characters in games.

    $84.44 /hr
    213 hours
    0.00
  2. Roman Molchanov

    Roman Molchanov

    C# Developer with WPF, WinForms, WCF, WinServices experience.

    Ukraine - Last active: 1 day ago

    Skills: .NET C# (.NET 2.0 - 4.5.1) - Expert (9.0 years, Last used -2015); WinForms (DevExpress) - Expert (8 years, Last used - 2015); WPF (MVVM, MEF, PRISM, Catel, DevExpress, Visual Studio + Expression Blend) - Expert (4.5 years, Last used - 2015); WebServices, WCF - Advanced (3 years, Last used - 2013); WinServices - Expert (4.5 years, Last used - 2015); .NET Sockets - Advanced (3 years, Last used - 2015); .NET Remoting - Novice (1 year, Last used - 2009) MS SQL Server (T-SQL) - Expert (7 years, Last used - 2015); ADO.NET - Expert (7 years, Last used - 2015); LINQ (LINQ to SQL, LINQ to OBjects, LINQ to XML) - Expert (7 years, Last used - 2015); ADO.NET Entity Framework - Expert (7 years, Last used - 2015); XML/XSL/XSLT - Advanced (3.5 years, Last used - 2015) C++ - Intermediate (3 years, Last used 2006); Object Pascal - Novice (2 years, Last used 2003)

    $22.22 /hr
    201 hours
    0.00
  3. Nazar Kacharaba

    Nazar Kacharaba

    android developer

    Ukraine - Last active: 5 days ago - Tests: 1

    I’ve been developing, and helping in designing android app for the past 2.5 years. Mostly working in a small team (2-3 members) but have a couple of projects developed by myself. Gained deep experience in android-db, android-secure, social integration, code optimization, writing custom UI; UI performance; publishing apps to store; Passionate in writing clean code and developing high performance and beautiful applications.

    $20.00 /hr
    202 hours
    0.00
  4. Raymond Doran

    Raymond Doran

    Senior Software Consultant

    United States - Last active: 5 days ago - Tests: 2

    I am an experienced, motivated and detailed Software Architect / Engineer with a complete end-to-end understanding of the software development process. Over 17 years of professional experience in software development, technology support, and graphic arts. Software development skills include Rich Internet Applications and Web 2.0, Object Oriented Application Design (OOAD), including the use of the Unified Modeling Language (UML), SQL, JAVA (J2EE, Hibernate, Spring, Struts), JSP, ActionScript, PHP, EJB, C++, HTML, XML, BlueMartini, Design Patterns, and managing small development teams. The past 15 years of my career have been mainly focused on the Java family of technologies with a strong emphasis on distributed applications over the internet or corporate intranet. I have also spent the last 6 years with Flex and Actionscript front ends. The ability to speak comfortably in large groups, one on one with clients, or mentoring peers is a skill that I have been able to acquire as well.

    $105.56 /hr
    1,286 hours
    0.00
  5. Andrei Petru Mura

    Andrei Petru Mura

    JavaSE, JavaEE software developer. OCAJ certificate.

    Romania - Last active: 6 days ago - Tests: 2 - Portfolio: 2

    I'm a Java software developer with more than 3 years experience, having experience in web and system applications. As databases I worked with MySQL and PostgreSQL, and HTML, CSS, JQuery or plain JavaScript, all of them integrated with Servlets/JSP or Play framework on the server side for web technologies. My experience is mostly developed around Linux operating systems. I also built a few C projects strictly for server side processing. My main interests are Web and Desktop applications.

    $6.00 /hr
    31 hours
    0.00
  6. Elmer americo C.

    Elmer americo C.

    Expertise in .NET Applications and Web Developer

    El Salvador - Last active: 22 days ago - Tests: 2 - Portfolio: 1

    Over 5 years of experience creating Desktop and Web Applications using C#, VB.NET, ASP.NET MVC, LINQ. Also I have experience creating and designing WebSites with resposive design using HTML 5, CSS 3, jQuery, Bootstrap and PHP. I'm seeking opportunities to build applications and websites from the ground up for you or your business. Also I have experience with DB like SQL Server, Oracle and MySql

    $13.33 /hr
    179 hours
    3.59
  7. Aris Widiantoro

    Aris Widiantoro

    Ruby On Rails Developer

    Indonesia - Last active: 29 days ago - Tests: 3 - Portfolio: 3

    I have more then 4 years experience in Java using J2SE, Ruby On Rails, XML, UML, JDBC, and PL/SQL, JSF and Hibernate,PHP,Mysql, CSS, NoSQL, Have very strong skills in the design, development, coding and implementation of software with a sharp learning curve that can be used for any new functional area in any position of the project team.Tools: Netbeans, Mysql, dreamweaverRDBMS, PGAdmin, MysqlWorkbench, Mysql, Firebird

    $13.33 /hr
    54 hours
    0.00
  8. Alexander P.

    Alexander P.

    Hadoop, Java, MapReduce, MongoDB, Couchbase, Redis, HBase, Pig, Hive

    Russia - Last active: 24 days ago - Tests: 3

    Programming languages: Java; Basic knowledge: JavaScript, C++, C#. Frameworks and libraries: Hadoop, Flume, Tomcat, Tapestry, Jetty, Maven, Hibernate, Quartz, Thrift, Android SDK, Couchbase, Zkoss Development environments: Intellij Idea, Eclipse Version control: GIT, Mercurial Other skills: OOD patterns, refactoring, TDD (Testing frameworks: JUnit, MRUnit, Fitnesse, JMeter), highload, RTB/Advertising, command development, NoSql: mongodb, hadoop/hbase, redis, couchbase, MySql Experience: Thumbtack Bidder Junior Developer, June 2013 - September 2013 Description: Demand Side Platform for integration with Google Ad Exchange Responsibilities: clarifying requirements; implementing test-tool for generation requests; implementing backend Technologies: Java, Hadoop, MongoDB, Redis, MapReduce ViNiA - RTB Junior Developer, October 2013 - current Description: Demand Side Platform for integration with Yandex Advertising System Responsibilities: clarifying requirements; implementing backend Technologies: Java, Hadoop, Mongo, Redis, MapReduce Aerserv - SSP Junior Developer, January 2014 - March 2014 Description: Sell Side Platform for integration with existing ad server Responsibilities: clarifying requirements; implementing backend Technologies: Java, OpenRTB eBay Enterprise - DSP Built out Developer, March 2014 - current Description: Demand Side Platform Technologies: Java, ZKoss, Tomcat, Hadoop, MySQL

    $20.00 /hr
    28 hours
    0.00
  9. Chamil Wijayawardhana

    Chamil Wijayawardhana

    Software Engineer

    Sri Lanka - Last active: 12 days ago - Tests: 1

    My Educational qualifications - BSc - University of Kelaniya, Srilanaka - Computer Science SCJP I'm working in a company for more than 5 years as a software engineer. During the period of working I have independently completed 5-6 foreign projects for customers like Nokia. Addition to the software programming I have done project management, requirement gathering and customer meetings with USA, Colombia, UK and Netherlands customers. I'm an expert in following areas. Java Jasper Report Server iReport SQL MySql PostgreSQL Sybase Servoy Filemaker Java Scripts

    $11.11 /hr
    153 hours
    0.00
  10. Kelly King

    Kelly King

    Programmer/DatabaseAdmin/Analyst

    United States - Last active: 7 days ago - Tests: 2

    Dedicated developer, technical support specialist, project manager, and IT consultant recognized as a resource for technical solutions including data management, C++ and Visual Basic programming, software development and implementation, database development, and systems troubleshooting, maintenance, and support. Skilled at assessing client and business needs, recommending strategies that enhance efficiency and maximize productivity, implementing cutting-edge technology solutions, and training/supporting end users.

    $38.89 /hr
    417 hours
    3.61