Ruby Javascript Freelancers

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Ken Hart

Ken Hart

Ruby on Rails Programmer, AJAX & JavaScript Web 2.0 Developer

United States - Tests: 5 - Portfolio: 7

Ruby on Rails developer, extensive experience with end-to-end web application development, which includes graphic design, layout, and content. Experience with Facebook API, GoogleMaps API, Restful Authentication (login functionality), PayPal, ActiveMerchant, Sphinx search plugins, & Captcha. HTML, CSS, JavaScript & AJAX development - Web 2.0.

$32.78 /hr
262 hours

Dmitry Gayduk

Web developer: Ruby on Rails front-end, HTML, CSS, Javascript

Ukraine - Tests: 5

Hi, My name is Dmitry My #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. Since 2011, I'm front-end developer. I have a Masters in Software Engineering from Donets'k National Technical University, in the Ukraine. Listed below are my experience and skills. — Core web: HTML/CSS, JavaScript, XML, JSON, SASS/Less, HAML/Slim; — Twitter Bootstrap 2/3 — Rails knowledge: Rails 3, Rails4, Ruby core — VCS: Git, Mercurial, SVN; — Bug/Issue trackers: Jira, YouTrack, PivotalTracker; — SQL;

$33.33 /hr
71 hours

Sumanju Kaushal Agency Contractor

Ruby on Rails/ php/ mysql/ PGSQL/ JavaScript / JQuery /Git /CMS /MVC

India - Tests: 4 - Portfolio: 8

Over the last 7 years, I have developed a wide range of websites from small to large using PHP, MySQL, Ruby on Rails, PgSQL, Cake php, WordPress, OpenCart, Smarty, JQuery, Ajax, Various API's (Facebook, linkedIn, youtube, twitter, google, yahoo, Alexa etc.), HTML, DHTML, Elgg, Seagull, phpFox, Smarty, Redis , Curl, Payment Gateways (PayPal, Authorize, ACH and many more) Expertise in developing web based applications using cakephp, RoR, WordPress, PHP, CSS, AJAX, JQUERY/JAVASCRIPT Good knowledge of unit testing, integrated testing and validation. Version Control:SVN, Git I am good to work as independent developer or in a team.

Associated with: ProAvid Software

$20.00 /hr
1,819 hours

Kirk Portas

Kirk Portas Agency Contractor

4+ Years Agile Ruby on Rails, CSS3, HTML5, Javascript Back-end Expert

United States - Tests: 4 - Portfolio: 2

Hello! I have been active in Software Development for 5 years, and am specialized in Agile Web Application development as a Back-end and Front-end developer. I often function as a project manager or team lead, and have delivered software for clients ranging from startups to banks to Fortune 100 companies. I'm available by phone, skype, or google hangout during EST hours, and am able to meet with clients and other stakeholders to discuss project requirements as needed. Expert in Web development with Ruby on Rails, C#/.NET and familiar with common APIs including: Facebook, Twitter, Google, Proficient with Javascript, CoffeeScript, jQuery, CSS3, HTML5, Twitter Bootstrap, Skeleton, HAML, SCSS / SASS. Have built applications using Devise, ActiveMerchant, full-text search with Sphinx or Solr, and integrated Stripe. Have some experience working with: Node.js, Backbone.js Strong experience with TDD, RSpec, Cucumber, Capybara. Good with Linux servers, able to deploy, maintain and scale websites. Also experienced in writing Web scrapers. I keep up on the latest technologies and love to work with the most advanced tools. My firm, Atto, also has brand and graphic designers, project managers, and other developers available if you need a small team.

Associated with: atto

$85.00 /hr
63 hours

Niels Ganser

Niels Ganser

German Engineered Ruby on Rails Solutions & Reliable Project Managment

Germany - Tests: 7 - Portfolio: 3

Hi, I'm Niels, a seasoned software engineer based in Germany mostly working on web applications of all kinds using Ruby on Rails (3 and 4), (My)SQL, mongodb, redis, HTML(5), CSS and JavaScript in an agile manner. I also set up and maintain Linux servers. Several applications that I architected, implemented and maintain are in active production use. Please see my portfolio for details. I have years of experience as a senior developer – working solo, in co-located teams as well as in distributed teams – and hold a postgraduate diploma in Management of Software Projects. My greatest prides are proactiveness, reliability and good communication Please note that I do *not* do graphic design. Not for a lack of interest, but for an unfortunate lack of artistic talent. Sorry! :)

Groups: Engine Yard Ruby on Rails Professionals Network

100% Job Success
$128.50 /hr
5,382 hours

Gaurav singh M.

Gaurav singh M.

Full Stack Software Engineer

India - Tests: 14 - Portfolio: 83

******1st position in 11 Upwork tests from a total of 14 in which I appeared****** I am a Senior Full Stack Php / MEAN Stack / Front-end JavaScript Engineer with extensive background in building web & statistical systems for clients all over the world since 2000. I am a Chemical Engineer by studies, which has helped me alot in understanding coding concepts, optimization & security protocols. I am a team player and have been part of teams as a Programmer, System Engineer, Project Manager, Consultant & CTO. I have experience in both Windows & Linux Server administration and have also worked with AWS, EC2 & Google Cloud. I have an extensive & successful experience in building & maintaining heavy traffic portals (Over 350K+ active users), Investment & Financial Management/Statistical Systems for Hedge Funds, eCommerce portals & Process Automation/Optimization Applications. I am part of a group of highly skilled IT professionals where we work as a team. Due to this I prefer fixed price jobs. I am not an agency but part of a group of technocrats specializing in different platforms. If you'll have a look at my work history you will see that I have quite a few fixed assignments there and all completely/delivered as per client satisfaction. I specialize in Agile & Lean methodologies, SCRUM, API design, Laravel, CodeIgniter, Symfony, Yii, Magento, Wordpress & Drupal. I have successfully worked on front-end development in numerous projects using CSS (SCSS/SASS), JavaScript, jQuery, Twitter Bootstrap & HTML5. I am particularly fond of JavaScript, especially its libraries (Node.JS, Raphael.JS, AngularJS, Backbone.JS, D3.JS). In terms of database management I have extensively worked with both relational & non-relational databases like MySQL, MongoDB, PostgreSQL, NoSQL, MSSQL, SQLite. I can assure you of my most honest & diligent efforts for actualizing your vision.

Groups: PayPal, Pro Web Designers

100% Job Success
$45.00 /hr
1,320 hours

Alexey Z.

Alexey Z.

Project Manager / Ruby On Rails

Israel - Tests: 6 - Portfolio: 10

I am currently freelancing RoR projects across the universe, fullstack rails coder for your duty. I have been doing this for the last 9 years now and I was employed as CTO & Ruby On Rails Senior developer, and my projects include wide usage RoR(1,2,3,4), I love new technologies and I can learn to use them very fast! I can develop anything starting from tech plan/mockup, through creating rails application (agile method) till full setup of VPS/dedicated server (or even cloud), then I can maintain and administrate this project. I work with cloud platforms like AWS, Heroku, EngineYard. I have ZERO unsatisfied clients. Knowledgeable in CI like Jenkins, and various management systems like Trello, Lighthouse, Jira, Redmine (You can have a tracking project with my private Redmine installation for no cost) and some others All small things around webdev; AJAX, HTML, CSS, JS, RSS, XML, JSON. SVN, GIT(preferred), Capistrano/Chef/Rubber for multistage deployment for test/production projects, SASS, SCSS, HAML, CoffeScript, REDIS, various types of caching. Capable to work in Linux/OSX/Windows environments.

Groups: Application Developers Alliance, Engine Yard Ruby on Rails Professionals Network

95% Job Success
$55.00 /hr
3,519 hours

Andrey E.

Andrey E.

Backend Developer with Frontend Skills

Russia - Tests: 6 - Portfolio: 15

I'm web scraping expert/full stack PHP/Javascript (Frontend/Nodejs) developer with 7+ years of commercial experience. I'm good problem solver holding M.S. in maths and computer science. Today I'm offering webscraping/php/javascript services as a freelancer. My main skills: • Web scraping, parsing, automation, data processing • Simplehtmldom, Goutte, Symfony Browser Kit, Cheerio, CasperJS, Regular Expressions, Xpath • PHP, JavaScript, Java, NodeJS, PhantomJS, SlimerJS, LUA • Laravel/Lumen frameworks • HTML5, CSS3, LESS, Bootstrap Framework • MySQL, MongoDB, Redis • Memcached, ZeroMQ, ReactPHP • SocketIO, Websockets • REST, SOAP, XML, JSON • Matlab, Wolfram Mathematica • Jquery, KnockoutJS, BackboneJS, RequireJS • Prestashop, OpenCart • Experience working with APIs: Ebay, Spotify, Amazon AWS, Amazon MWS, Flickr, Facebook Graph,, GitHub, Instagram and several others • Git, SVN • Apache, Nginx, Curl • Amazon AWS • Linux, Vagrant • Understanding of OOP principles and software design patterns • Teamwork experience I have a github account and personal blog. Unfortunately Upwork doesn't allow to share these details in overview:) Over the years I’ve developed a lot of web scrapers of different complexity mostly using PHP (simplehtmldom, browserkit) and NodeJS/PhantomJS (casperjs). Some were simple regex-based and others were complex distributed systems with multiple proxies and Amazon AWS support. Also I developed a wide range of websites using PHP, HTML, JavaScript, CSS and MySQL including several e-commerce websites (+ Prestashop, Opencart). I built sites both from scratch and using frameworks, developed custom modules and extended existing ones for my clients. I have experience in PHP/MySQL performance tuning. Last two years I was working as MMO game (Clash of Clans/Heroes of Might and Magic-like mechanics) logic/backend developer. I’ve implemented distributed message queues, realtime leaderboards with Redis, Mysql, PHP. Developed battle-related algorithms (game unit classes, attack/defend, shortest path, quadtree). Then I’ve done some frontend development, e.g. – developed embeddable javascript classifieds widget and fitness/health single page web application with realtime updates/notifications (HTML, CSS, JavaScript, Jquery, Knockout.js, MomentJS, REST, AJAX,

Groups: Coding Champs

98% Job Success
$39.90 /hr
231 hours

Jose miguel R.

Jose miguel R.

Senior Software Developer / Agile / DevOps / Ruby / C# / SQL / JS

Bolivia - Tests: 11

I'm a Senior Developer with 10 years experience, including exposure to SysAdmin tasks and DevOps. I'm an agile developer, who practices BDD while trying to master Ruby and Ruby on Rails, also I have a lot of experience with C#, JavaScript, SQL and Web technologies from my corporate background. I've been using Linux since the early 00's, I prefer Vim and I manage my infrastructure with Vagrant, Docker, Ansible and shell scripts. - Technical Skills * Ruby / Ruby on Rails / Sinatra / Grape * .Net Framework / C# / VB.Net / Asp.Net / MVC / NHibernate * SQL / MSSQL / MySQL / PostgreSQL * Javascript / jQuery / jQuery.UI / AngularJS * HTML / CSS * Testing / BDD / MSpec * GNU / Linux Administration - Other characteristics * Convention over configuration * Behavior driven development / Test driven development * Continuous integration * Progressive enhancement * Agile development

85% Job Success
$45.00 /hr
4,586 hours

Maciej Zubala

Maciej Zubala Agency Contractor

Senior Ruby On Rails developer

Poland - Tests: 4 - Portfolio: 6

Software development is not only my profession but also my greatest passion and hobby. This is why I spend majority of my free time improving my programming skills, learning new concepts, technologies, languages and tools. I get the greatest satisfaction when products I develop are released to the world and people start using it - that makes me want to spend more time at work. When not in front of my monitor, I'm probably taking care of my daughter or doing some sports (tennis and swimming most of the time).

Groups: Upwork Verified Developers

Associated with: Rocket Mind Software

100% Job Success
$38.89 /hr
5,523 hours