Ruby On Rails Javascript Freelancers

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Zbigniew Pieslak

Zbigniew Pieslak

Expert Ruby on Rails & Javascript Web Developer

Poland - Tests: 8 - Portfolio: 8

Over the last 7 years I have acted as a web developer and a Ruby on Rails expert, having the privilege of working with large international enterprises (NBCUniversal) as well as many promising startup companies. I consider myself to be a hard-worker motivated to deliver only a well-tested, scalable and performance-wise code that meets the current programming standards. During my career, I learned that understanding client's needs, good planning, proper programming experience as well as regular and honest communication are the key factors to build a successful relationship. Please have a look at my portfolio and the feedback I got from my clients. I’m passionate about learning new tools and programming languages and I quickly adapt to new environments. I’m seeking long-term relationships and new challenges. I am looking forward to hearing from you about your next project!

$40.00 /hr
4,063 hours

Artem S.

Artem S.

Ruby on Rails / Javascript Developer

Russia - Tests: 5 - Portfolio: 4

Hello, and thanks for viewing my profile! I'm an awesome web-developer, who can build any product you want - even with impossible deadlines. I have 8 years of commercial development experience. My primary specialisation is Ruby On Rails full stack development with higher emphasis on the backend. I have created from scratch and enhanced many web applications and mobile app backends, worked in a variety of niches including social online TV, mobile apps for kids, and online travel agencies. I understand my strengths and weaknesses and will notify you about any possible problems upfront. My main concern is caring about what I do and how I do it. I am always learning new approaches to create wonderful things, and do even more to deliver all this awesomeness into your product. Send me a message and you'll never regret it! Knowledges: Ruby, Ruby on Rails 3/4 Angular.js HTML/HTML5/HAML/Jade/Slim/erb CSS/SCSS CoffeeScript/JavaScript node.js ActionScript 3 / Air (Adobe Flash technology stack) with cross-compile to mobile platforms (with starling) PaaS: AWS, Heroku, Nodejitsu. MySQL, PostgreSQL, sqlite3. mongoDB, redis, memcached. TDD/BDD – RSpec, Capybara, jasmine gulp SVN, Git. Twitter Bootstrap,, jQuery, sugar.js, underscore and dozen of other popular libraries. Experienced with building RESTful API. Experienced with a highload. Background jobs with existed solutions (resque, delayed jobs, etc) and just pure Rake & Cake tasks for automating processes. oAuth with popular social networks (Facebook, Twitter, Vkontakte). Used to work with Wowza Media Server (live video streaming), with writing plugins to it. ... and even more. In the near future I would like to learn Clojure, Go and reduce consumption of caffeine. If you are still in doubt – just contact me and I tell you how exactly I build what you want. Thanks for viewing my profile!

$50.00 /hr
972 hours

Eduardo M.

Eduardo M.

Ruby on Rails / PHP / Javascript / Backbone.js / Angular.js

Bolivia - Tests: 6 - Portfolio: 7

- Software engineer with 5+ years of experience on Web, desktop and mobile development - Excellent communication skills and team player - Full Stack Open Source Software Engineer - Strong object oriented programming and design patterns skills SPECIALTIES AND EXPERIENCE - Programming languages: Ruby, PHP, Javascript, Java, Python, Objective-C, C, C++, Visual Basic, HTML, CSS - Web backend: Ruby on Rails, Sinatra, Node.js, Wordpress, MySQL, PostgreSQL, Redis - Web front-end: SASS, LESSCoffeeScript, Backbone.js, AngularJS, Underscore.js, jQuery - Infrastructure Environments: Amazon Web Services (AWS), Heroku, Digital Ocean - Development tools: SublimeText, Git, SourceTree, PivotalTracker, Atlassian Jira, Basecamp, Balsamiq Mockups - Operating Systems: Mac OS X, Linux, Windows - System administration with Unix based systems - Mobile development: Native iOS apps with Objective-C, native Android apps with Java - Desktop development: Desktop apps with Java and Python + GTK - Test Driven Development (TDD) - Agile software development - UX design PASSIONS - Learning new technologies - Open Source Software - Distributed and scalable systems design and implementation - Awesome and innovative UI design - Mountain biking

$60.00 /hr
3,474 hours

Eugen O.

Eugen O.

Ruby on Rails, JavaScript, SQL, jQuery, AngularJS

Belarus - Tests: 4 - Portfolio: 3

Senior Ruby Developer, 3.5+ years of experience in Analysis, Estimate, Design, Development and Maintenance of Web­based Software applications in a bunch of domains including News, E­ticket, Social network, ERP and Internet/telephony billing. Experience in both UI programming and Server Side programming. Profound knowledge of Ruby and JavaScript (CoffeeScript), particularly developing rich internet applications based on Rails and AJAX (JS frameworks ExtJS, Spine, AngularJS). Proficient in HTML, CSS and their wrappers haml, slim, sass. Have knowledge in C, C++, C#, Java, Erlang, Haskell, MATLAB (Octave) and R languages, Design patterns, UML, Object Oriented Design, Test/Behavior ­Driven Development, unit and integration testing (using RSpec, Cucumber and Capybara). Worked with relational databases MySQL, PostgreSQL, MS SQL and NoSQL solutions: Cassandra, Redis, MongoDB, Neo4j. Skilled in HTTP, REST, XML and JSON. Have experience in cloud solutions (Amazon AWS, Heroku) and Linux distributions. Expertise in estimating of the development efforts based on project scope on initiation phase, analysis of the complex business logic; support and maintenance of the live applications; performing of technical examination and prove­of­concepts (prototyping) for the effective solutions; code review; communication with the development team and QA; direct dialog with the Client.

Groups: Coding Champs

$33.33 /hr
93 hours

Rui Gomes

Rui Gomes

Web Developer - Proficient in PHP, Laravel, Javascript, Ruby on Rails

Portugal - Tests: 4 - Portfolio: 3

I've worked closely with world-class companies throughout the development of outstanding platforms that have been used by thousands. I'm proficient with PHP and I'm also a Laravel early-adopter - I've been using it since early version 3. I've developed countless applications with Laravel, attended the Laracon conference in Amsterdam and I've written several tutorials that have helped hundreds of other developers. In addition to PHP, I've also used Ruby on Rails extensively to develop complex web applications with full featured test suites. Being a Software Engineering student, you'll be sure to get solutions that are well designed, easy to scale and develop upon. I've taken a CAE (Certificate in Advanced English) by the University of Cambridge and passed with flying colours. Communicating with me won't definitely be an issue. Looking forward to working with you on your next web app!

$70.00 /hr
175 hours

Petros C.

Petros C.

Ruby on Rails / Javascript Engineer

Canada - Tests: 6 - Portfolio: 3

About me : I have 8+ years of experience in different fields of software design and development. Over the past 5 years I have used all my skills and various technologies like RoR, OO JavaScript, Angularjs, Backbone, Html5, Css3, with the most effective way and tried to help other passionate people achieve their own goals. I have worked with most of the JavaScript frameworks like angularjs and backbone in various web and mobile projects and obtained a thorough knowledge of the front end dynamic environment. I'm constantly looking and embracing new technologies and stay updated, I also consider myself to be a problem solver with very good communication skills (activity of conveying information through the exchange of ideas).

Groups: Upwork Verified Developers

$32.00 /hr
65 hours

Vadim Marchenko

Vadim Marchenko

Ruby on Rails / JavaScript Developer

Russia - Tests: 5 - Portfolio: 8

I’m a seasoned Ruby / JavaScript developer with over 5 years of experience. I have experience in developing web-applications & services with both standard functional and unusual features using different platforms and technology stacks. I know how to pick the right instrument to reach the goal. I’m good at: developing multiplatform and security sites, database design, using version control system, using TDD and tests, working in a team, and more. Possess strong technical skills in Ruby on Rails, node.js, Bitcoin stack, CoffeeScript, PostgreSQL.

$33.33 /hr
2,880 hours

Aleksey Stroyevskiy

Aleksey Stroyevskiy Agency Contractor

Ruby on Rails / Javascript / SQL

Russia - Tests: 6

Hi! I'm a professional web developer. I have more than 3 years of the experience. I work with these languages: Ruby, JavaScript, SQL and etc. My main skills are: ✓ Ruby / Rails 3.x / Rails 4.x ✓ Javascript & Coffescript (Node.JS / Client MVC frameworks) ✓ PHP / Zend / Codeigniter / Kohana / Yii ✓ HTML / DHTML / HTML5 / CSS / HAML / Less / Compass ✓ MySQL / PostgreSQL / nosql If you need a good and high quality web application, I will be glad to develop it for you.

$30.00 /hr
1,230 hours

Sean O.

Sean O.

Ruby on Rails and JavaScript Web Developer

United States - Tests: 2 - Portfolio: 2

Hello, my name is Sean, I'm a full-stack Ruby on Rails and JavaScript web developer. I have over ten years of professional experience. My focus is on sustainable web application architecture with Ruby on Rails, Ember.js, Backbone.js, jQuery and responsive HTML/CSS. My skills include: Ruby, Ruby on Rails, Sinatra, RSpec Elixir, Phoenix, Clojure, Haskell JavaScript, jQuery, React.js, Ember.js, Backbone.js, Jasmine npm, bower, gulp.js, webpack SQL [MySQL, PostgreSQL, SQLite] Elasticsearch, Solr PHP, Wordpress HTML/5, CSS/3, Sass, Responsive Design Linux, Apache, nginx, Heroku, Vagrant Git, GitHub, Bitbucket

$83.33 /hr
156 hours

Maxim Ananko

Maxim Ananko

Web Programmer - Ruby on Rails/Javascript/PHP

Ukraine - Tests: 5 - Portfolio: 1

I enjoy creating web applications that are powered by Ruby on Rails, PHP on the backend side. I have been working as a Web Developer building a wide range of sites using PHP/MySQL, AJAX, Javascript. At the present time, I am looking for opportunities to create, develop and/or enhance websites. In addition, I am available for ongoing support and any other web development needs you may have.

$30.00 /hr
457 hours