Top Upwork Freelancers

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  1. Chalitha Wickramathilaka

    Chalitha Wickramathilaka

    Senior Backend Programmer / Tech Lead

    Sri Lanka - Last active: 15 hours ago - Tests: 2 - Portfolio: 15

    From almost 12 years I have been working with php based web applications. MVC, and Zend Framework 1/2 development environments. I have the same experience with java scripts /jQuery/extjs frameworks. I have more than 7 yrs experience on load balancing . Clustering , and replication over debian, centos and redhat systems. I use Oracle and mysql databases on most of my projects. As a code collaboration tool I am using Gforge with svn/git for my projects. also I have strong experience with iptv application such as tvguides, epg, music applications etc etc. I have been working on high loaded websites, application databases for my work. I have strong knowledge of optimizing web applications smooth run on a very high load. Also I have experience with hardware Visualization on VMware boxes. I have additional experience in ETL Jobs / Mysql clustering / Piranha / php heavy load balancing / caching nodes. Android / FB apps/ REDIS/VMware ESX configuration

    $33.33 /hr
    4,870 hours
    5.00
  2. 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
    1,497 hours
    4.83
  3. Serhiy C.

    Serhiy C.

    C# Developer

    Ukraine - Last active: 3 days ago - Tests: 4 - Portfolio: 2

    12 years experience working with .Net Framework and C# including: - windows forms - multi-threading applications - xml and xslt - Ado.Net - wpf - asp.net - MVC 3-4 (including Entity First) - silverlight - visual studio extensions (VSPackage) - encryption - xml webservices Also have experience with - Microsoft SQL Server 2005, 2008, 2012, Compact Edition - Customizations of Microsoft Dynamics CRM 2011 - MySQL - SqlLite - JavaScript and jQuery - Scribe - Android development - a little bit of Microsoft Azure and Amazon S3 clouds - a tiny bit of Unity 3D Something that was long ago but can be recalled if really necessary includes C++, Delphi 5.0-7.0, COM objects, Win32 API, a bit of OpenGL and DirectX

    Groups: Microsoft Certified Professionals

    $22.22 /hr
    3,236 hours
    4.91
  4. 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
    1,013 hours
    4.75
  5. Sergey Shubin

    Sergey Shubin

    Expert .NET WPF WCF MVVM Developer

    Bulgaria - Last active: 15 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
    1,494 hours
    4.97
  6. Ivan S.

    Ivan S.

    Senior PHP/Zend/Phalcon Dev with HTML/CSS/JavaScript/jQuery experience

    Ukraine - Last active: 15 hours ago - Tests: 9 - Portfolio: 11

    I have almost 10 years of web-development and database administration experiences for various kinds of applications. I have extensive experience in database optimization. I focus on PHP, JS, MySQL, MongoDB. Over 9 years of IT working experiences with a proven background of technical problem solving. A self-motivated, reliable, responsible, and team player with a set of very strong technical skills. * Zend / Kohana Frameworks * Database design * Optimizing database performance * Ensuring security in the database * Ensuring the integrity of databases I have 8 years experience developing web based applications using PHP, Javascript, html and css.You can be assured of the quality of work and the usability. I participated in the creation of high-load systems (Hundreds of queries per second). I'll be glad to help you. Best regards, Ivan.

    $33.33 /hr
    4,867 hours
    5.00
  7. Nazar Kuliyev

    Nazar Kuliyev

    Web Dev (node.js, RoR) - overall 15 years experience as programmer

    Kazakhstan - Last active: 15 days ago - Tests: 14 - Portfolio: 11

    Looking for interesting projects. 7+ years freelancing. 30+ projects done or assisted. Last 4 years mostly RoR experience. May fix/adjust/add features to your existing Rails app. I'm in asia (GMT +6), but may overlap with your working hours for at least 2 hours per day (skype, voice/webcam possible). I don't do graphics design, but can implement front end from blueprints (PSD). My skills include: ruby (Ruby on Rails), js (jQuery, backbone), HTML5, CSS3, git (github, bitbucket), heroku, ssh (managing linux servers AWS, Digital Ocean), mobile development (Phonegap), issue trackers (asana, github) Working environment: OS X, Ubuntu, Windows

    $22.00 /hr
    2,366 hours
    4.99
  8. Alexandr Mankov

    Alexandr Mankov

    Web Software Engineer (LAMP, AJAX, etc)

    Russia - Last active: 16 days ago - Tests: 6 - Portfolio: 2

    Looking for a position as a sr. developer / project manager.I have been developing software for web applications for over 10 years, I am well versed in PHP, Perl, HTML/CSS, JavaScript and Ajax. Also i am an expert in related areas as UI development, so I do not require constant supervision since I'm able to improvise in case the specs are incomplete and if I have permission to do so. I am working very fast, hiring me you get not only top quality, but reasonable price too.I have some ready-to-use functions\classes which comes with me from project to project, which allow me make custom code to easy handle high-load sites and don't require wasting time for routine tasks same time. I am online very often, including holidays, you can be sure you will be able to reach me within one day no matter what your timezone is.

    $66.67 /hr
    2,485 hours
    4.89
  9. Juan David Gil Diaz

    Juan David Gil Diaz

    Not Another Java Programmer

    Colombia - Last active: 2 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
    2,676 hours
    4.95
  10. Gaurav B.

    Gaurav B.

    Expert Java,Scala Web Developer(JSF,Spring-MVC,Play,Hibernate,Jquery)

    India - Last active: 3 days ago - Tests: 1

    I have 8+ years of experience and I have worked with large (Oracle) and mid size (Zensar) companies. Languages : Java (6,7,8), Scala, Javascript Frameworks : Java Server Faces, Spring Stack, Java Persistence API, Hibernate, Play! 2, Secure Social, AngularJS, Underscore Technologies : JDBC, JNDI, Primefaces, Servlet, iText, OpenSAML, Apache HTTP Client, Jedis, Jackson, Cognos SDK Github : https://github.com/gaurav-bagga REST API : Google Admin SDK, Windows Azure Directory API, Salesforece API, Zendesk API Databases : MySQL, MS SQL, Apache Derby, Redis, LDAP User Interface : HTML, CSS, Twitter Bootstrap, Require JS Application Servers : Weblogic, Tomcat, Glassfish Testing : Junit, Mockito, Dbunit Build : Maven SCM : Subversion, Git IDE : Eclipse, Netbeans Operating Systems : Windows, Linux, Mac OS X

    $22.22 /hr
    1,406 hours
    4.67