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Code Refactoring Upwork freelancers typically receive a client rating of 4.85.

Last updated: October 1, 2015
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Dmytro S.

Dmytro S.

Web/Software Developer - Java/Flex/Flash/3D/HTML/CSS/JS/Unity3D

Ukraine - Tests: 8 - Portfolio: 2

Over the last 8 years, I have developed a range of websites using HMTL, JavaScript, Tibco GI, Flex, Flash, Unity3D, Java(JSP, Servlets, Struts, etc.) and MySQL, MS SQL Server, Oracle including sites for startup companies, small businesses and very large CRM applications for bank with world name. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business.I also have good experience in the following areas: 3D development, OOP, SQL, Ajax and software design and testing.

$38.89 /hr
2,009 hours

Aleksey Lysenko

Aleksey Lysenko

Senior C++ (Qt) Developer


Hi, I'm Alex Lysenko. I have c++ experience over 7 years, also Qt experience over 6 years. I have manager skills (team lead of 4 developers). I have communication skills, well organized, self-starter, flexible, quick intellect, natural curiosity, mentoring and multi-tasking skills.

$25.00 /hr
0 hours

Rafael J.

Rafael J.

Ruby, Node.js, Javascript, Go, Java, NoSQL, Devops

Brazil - Portfolio: 1

I am passionate developer and aim to work in a product-driven company, on a product that has a lot of usage and visibility, and applications that are or need to be: - Reactive / Event driven and non blocking I/O - Scalable / Resilient / Fault-tolerant - Domain driven - Nice code is the first citizen - Microservices architecture - Polyglot development(Node, Ruby, Go, Scala, NoSQL, etc..) Skills I have: Ruby - Rails, Sinatra, EventMachine, Celluloid, JRuby, Rubinius, Rspec, Capybara + main gems Node - Express, Restify, Hapi,, Mongoose, Nano, Sequelize, Grunt, Gulp, Bower, Mocha, Chai + main packages Javascript - ES6, Backbone, Ember, React, Angular, Coffescript, Zepto, Mustache, Handlebars, Require, Browserify, Sinon, Jasmine Java - VRaptor, Play Freamework, Spring(Rest, Data, Security), JAX-RS, CDI, Netty, Mockito, Selenium, Liquibase HTML5 API - Server Sent Events, Web Workers, Web Storage Design - CSS3, SASS, Flat UI, Twitter Bootstrap, Zurb Foundation, Semantic-UI Queues - ØMQ, RabbitMQ, Sidekiq, Resque, JMS, HornetQ Database - Mongodb, Couchdb, Redis, Memcached, Dynamodb, PostgresSQL, MySQL, Oracle Continuous Integration - Travis-CI, Hudson, Jenkins, Code Climate Devops - Vagrant, Docker Servers - Puma, Tomcat, JBoss, Nginx Cloud - AWS, Heroku, Digital Ocean, Opensfhift, SalesForce, Joyent, Nodejitsu Hello World - Go, Erlang, Elixir, Scala, Clojure * Latest books - Ruby Under a Microscope - Reactive Design Patterns - Node.js the Right Way - Dynamo: Amazon’s Highly Available Key-value Store - MongoDB Applied Design Patterns - Scaling CouchDB - Refactoring (ruby edition) - Implementing Domain Driven Design - Building Backbone Plugins - Building Web Applications With Erlang International Experience: 2005 - 2006 - Lagos, Portugal 2006 - 2007 - Palma de Mallorca, Spain 2008 - (lived on a Sail Boat) Caribbean

$66.67 /hr
0 hours

Jay Jim

Jay Jim

Solutions Architect

Kenya - Tests: 3 - Portfolio: 4

Quality Assurance is the mainstream of Information Technology and to maintain your market niche functional, performance and security testing ought to be on your checklist when developing and upgrading your application My goal is to bridge the gap by providing cutting edge services in functional, performance and security testing by making use of state of the art technologies such as UFT,Selenium, Loadrunner, JMeter and Veracode amongst other tools in the quality assurance space.

$7.00 /hr
0 hours

Dipakkumar D.

Dipakkumar D.

Senior NET Developer, Project Manager : 100+ Successful projects

India - Tests: 7 - Portfolio: 12

Having 9 years of experience as an Offshore Developer & Team leader in a wide variety of business applications such as Event management, CMS system, Ecommerce application, POS Application, Social Networking Api , Highly database related analytic applications. Technical Expertise * Development / Maintenance / Improvement - Refactoring of Web , N-Tier Object Oriented applications. * / C# / VB / .Net MVC / DotNetNuke / Silverlight / Kooboo Framework/ Nopcommerce * WebService /RESTFul Service / MultiThreading. * PHP / Mysql * Jquery / Phonegap /CSS3 * Facebook API / Google Map & Analytics Api / Twitter API / Amazon AWS / Paypal * Telerik Controls / DevExpress Tools * SVN / GIT / TFS / Basecamp As a programmer I always love clean n neat code to produce quality application. I Have completed more than 7000 Hours and 100 small and large levels projects experience into Microsoft .Net Technologies and PHP too.

81% Job Success
$60.00 /hr
8,218 hours

Jahirul Islam Bhuiyan

Jahirul Islam Bhuiyan

System Analyst

Bangladesh - Tests: 15 - Portfolio: 1

self development and organizational skill development at management level. ► Highly motivated, dependable troubleshooter and problem-solver ► Customer-focused performer who is committed to quality in every task – from personal interaction with coworkers and users to high level of service provided to company/customer ► Valued contributor who performs confidently and effectively under pressure and thrives on challenge ► Excellent communicator and good listener ► Enthusiastic learner who quickly grasps concepts technical skills You can find me- at LinkIn at MVA

$11.11 /hr
177 hours

Vasily Liaskovsky

Vasily Liaskovsky

Salesforce developer / Java developer

Belarus - Tests: 8

5+ years of Java developing experience 4+ years developing on web worked with 6 different DB vendors 3+ years practice in javascript and jQuery 1 year of Salesforce experience more than 20 projects participated in Certified developer (though certification expired)

$9.00 /hr
314 hours

Andrei C.

Andrei C. Agency Contractor

Creative iOS/BlackBerry/CrossPlatform Developer

Ukraine - Tests: 1 - Portfolio: 8

I'm a skilled iOS/BlackBerry/CrossPlatform developer who have already created a huge number of various applications. My passion is to create perfect code and make all the necessary to make bug-free applications. Also my English skills help me to contact with my clients and always be on the same page with them during development process.

Associated with: MobiDev

100% Job Success
$29.00 /hr
5,064 hours

David B.

PHP/MySQL Developer Specializing in E-Commerce Platforms

United States - Tests: 9

Over the last 10 years, I have specialized in e-commerce. I got my start working on simple osCommerce installations. Since then, I have progressed to building and working with highly-customized and integrated platforms, becoming an expert in PHP/MySQL, HTACCESS, JavaScript, AJAX, jQuery, and XML. I have also had the opportunity to work extensively with many other frameworks and API's. I have a lot of experience with Google Adwords API, credit card and shipping interfaces, and numerous other external libraries. I enjoy challenge of optimizing applications for peak performance inventing new methods for automation, streamlining back-end operations, and providing custom analytics. I pride myself on being able to jump into a project quickly and to creatively solve nagging problems. Although I do have experience with HTML and CSS, I am in no way a designer. I am strictly a coder, and, simply put, I love my work. I have worked with over 180 clients on 275+ projects. Excellent communication skills and driven work ethic. I am a perfectionist, and I am not happy until the client is happy.

Groups: Application Developers Alliance

100% Job Success
$94.44 /hr
3,714 hours