Top Upwork Freelancers

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  1. Kyle L.

    Kyle L.

    HTML5/JS/.Net/SQL Developer, US based, 12 Years Experience

    United States - Last active: 5 days ago - Tests: 2 - Portfolio: 3

    Over the past 12 years I have developed numerous web and Windows projects for both internal and public systems. I have used primarly HTML5, Javascript, AJAX, Knockout.js, ASP.Net and SQL Server. I have more limited experience with PHP and MySQL. I am currently the CTO at Greenvelope.com and am the primary web application developer for Greenvelope's web-based formal invitations. Prior to that I spent 10 years at EBI MAP-Works where I was most recently was the Director of Information Systems overseeing a team of 7 developers. I was responsible for the completion of all software projects, from conception to delivery and beyond. My strengths are my knack for database design and my quick coding skill. My objective at oDesk is to use my skills and experience to spend some time each week doing fun and interesting projects. I hope to build an ongoing relationship with one or more employers.

    $55.56 /hr
    33 hours
    4.99
  2. Monica Gerchinhoren

    Monica Gerchinhoren

    Mobile Developer and Tester

    Argentina - Last active: 1 day ago - Tests: 1 - Portfolio: 6

    I'm a System Engineer with 10 years of experience. Over the last 6 years I have developed and tested a wide reange of mobile applications in the main platforms iOS and Android. You can check my portfolio and my linked in profile ar.linkedin.com/in/monicagerchinhoren/ Y have several mobile devices phones and tablets I'm very responsible and proactive.

    $13.33 /hr
    1,007 hours
    4.75
  3. Nikolay G.

    Nikolay G.

    Technical Lead (Java)

    Russia - Last active: 1 month ago - Tests: 8 - Portfolio: 2

    I'm an experienced Java programmer with solid principles in programming, architecture and code quality. I have a wide experience in Java-related technologies, so I can provide you high-level end product. I love to learn new technologies, frameworks etc, so research projects will be also interested for me. NOTE: If you are looking for bad quality, cheap, fast written code - do not distirb me, please. I'm not interested in working in a team which don't follow clean code, DRY and SOLID principles.

    $30.00 /hr
    1,037 hours
    4.86
  4. Arsen S.

    Arsen S.

    VoIP Administration & Development

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

    I am focused in VoIP field only and I have been working here for more than 8 years. My Area of experiences: VoIP -Asterisk PBX: Full proficiency -FreeSWITCH: Full proficiency -Yate: Full proficiency -Strong knowlege of SIP protocol and SIP routers/proxy servers -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVR and Auto Attendant Development -Secure VoIP: TLS, SRTP, ZRTP Full proficiency in free Billing/CDR solutions: -A2Billing: Full proficiency (configuration from scratch, customisation) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime stat for asterisk and freeswitch) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. I have successfully completed large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integration of various VoIP solutions into existing network environment. I also have experience in building of secure "bastion" VoIP/Linux servers. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -Fixed price projects are calculated based on the hourly rate and expected task complexity. -For all fixed price projects complete project specification with clear tasks description is required -For all fix price projects work will be started only after payment has been es-crowed and both parties have agreed with working terms.

    $55.56 /hr
    175 hours
    4.54
  5. Sergey Shubin

    Sergey Shubin

    Expert .NET WPF WCF MVVM Developer

    Bulgaria - Last active: 23 hours ago - Tests: 6 - Portfolio: 18

    Last 20 years I have been programming various kinds of software applications: from simple DOS programs to enterprise-level multi-tier applications. Started with developing C/C++ scientific software, I have moved to business application development and for last 14 years I'm using .NET platform for this purpose. I am a results-oriented developer with extensive experience in C#/VB.NET, WPF, MVVM, WCF, MS SQL Server, Windows Forms, Silverlight. In my work I always use a modern software technology and try to create solutions with the best price/quality ratio. Coding is my passion, and it's just as much fun now as it was when I got my first program to compile...

    $38.89 /hr
    1,484 hours
    4.97
  6. Dmitry S.

    Dmitry S.

    Web, Desktop Developement, Consultant 15+ yrs experience

    Ukraine - Last active: 1 day ago - Tests: 3 - Portfolio: 9

    Areas of Expertise: ✓ Gathering and Analyzing Project Requirements ✓ C#, ASP.NET, MVC 3/4, WebForms, Delphi 1-XE5/Pascal ✓ JavaScript, JQuery, Twitter Bootstrap, Ajax ✓ JSON, JSONP, XML, (D)HTML, HTML5, CSS ✓ Entity Framework, Linq2SQL, NHibernate ✓ MS SQL Server 2005-2012, MySQL, SQLite, Interbase/Firebird, SQL ✓ Crystal Reports, FastReport, QuickReport ✓ SVN, Git, CVS, Atlassian Jira ✓ SOAP, REST, HTTP(S), FTP, TCP/IP, POP/SMTP ✓ Google API, Facebook API, SMS Gateway, Payment Processor ✓ OOP/D, UML, SOLID, Design Patterns, TDD, Agile, SCRUM ✓ Visual Studio 2005-2012, Resharper, dotTrace, FXCope, NUnit, Log4Net

    $25.00 /hr
    1,492 hours
    4.83
  7. Tabraiz J.

    Tabraiz J.

    Software Architect

    Pakistan - Last active: 1 day ago - Tests: 6 - Portfolio: 7

    To give the very best to my Customers in terms of execution of ideas, honesty and integrity during the application development cycle - perseverance to help them get what they ‘really’ want and never backing out of my commitments. Have been working in the field of IT for the past 15+ years in different roles as programmer, system analyst, software architect and consultant. Expert in most of Microsoft Stack. Well versed in Windows Internals, CLR framework, multi-tier application design and development, threading, Windows systems programming - have been recently working on Android and iOS.

    Groups: Crossrider

    $27.78 /hr
    1,240 hours
    4.98
  8. Juan David Gil Diaz

    Juan David Gil Diaz

    Not Another Java Programmer

    Colombia - Last active: 3 days ago - Tests: 6 - Portfolio: 1

    During the last years, I have been working as an employee as well as an academical student/researcher with J2EE Web and J2SE stand-alone environments. During the last year I worked for PSL (www.psl.com.co), CMMI level 5 company qualified for their good practices and awarded with the Software Process Achievement Award by the IEEE and the SEI (Software Engineering Institute). In PSL I developed some modules for a large Web proyect called Impacta, sold to a important motorcycles assembler in Colombia. Impacta is a Web application module that communicates with the company's ERP through Web-services, it has a multi-layer arquitecture that supports a with a CRM like functionality. Impacta uses JSF(Java Server Faces) for its presentation-layer, along with Ajax, in its business-layer uses pure Java integrated with Spring and Web- Services(Xfire) and in its persistence-layer, a PSL's propietary persistence framework was used against an Oracle DB.

    $25.00 /hr
    2,667 hours
    4.95
  9. Darryl K.

    Darryl K.

    Darryl K. Java SE, EE and Android developer

    France - Last active: 3 days ago - Tests: 2 - Portfolio: 5

    I'm a JAVA EE Engineer working in Paris, France. As a developer, i use intensively the JAVA technology in almost all my works from shell application to Enterprise Application using JSF, EJB, Spring, Struts and Liferay technology. Beside my favorite technology -JAVA- i also use Pascal Object, C#.NET 4 and C/C++. For web technology, i used to work with PHP and JQuery. I publish some of my personal projects on my website : http://www.darrylsite.com/

    $20.00 /hr
    352 hours
    4.98
  10. Sergey S.

    Sergey S.

    UI Programmer

    United Kingdom - Last active: 6 days ago - Tests: 3

    I am a skilled UI and gameplay programmer with more than 9 years of experience in game development industry. Skills * Strong C++ skills, OOP * Unreal Engine, Unreal Script * Unity3D, NGUI * Action Script 2 & 3, LUA, C#, Python * Gamespy SDK * Fluent English, einfach Deutsch LinkedIn: http://uk.linkedin.com/pub/sergey-sitnikov/14/45b/42/

    $16.67 /hr
    196 hours
    4.97