Senior Ruby On Rails Freelancers

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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

$38.89 /hr
5,614 hours

Marcin Szczepanski

Marcin Szczepanski Agency Contractor

Senior Ruby on Rails developer

Poland - Tests: 9 - Portfolio: 10

I have been developing web applications as a hobby, before it became my profession. I am a young developer but with solid experience already. I was involved in the creation of a number of interesting projects/applications. I am constantly broadening the scope of my skills and techniques. I like working in team and I'm always willing to share knowledge.

$32.00 /hr
4,826 hours

Dmitri Kanavalchuk

Dmitri Kanavalchuk

Senior Ruby on Rails Developer

Belarus - Tests: 11

I'm fullstack developer. My strong communication, time planning, estimating, analysis and programming skills are guarantee that your tasks will be done properly, perfectly coded and finished in time. My current skill set includes: * Ruby, Ruby on Rails * MySQL/PostgreSQL/Neo4j/MongoDB * JavaScript/CoffeeScript/AngularJS/jQuery * RSpec/MiniTest/Capybara * HTML5/HAML/SLIM * CSS3/SCSS/LESS, Twitter Bootstrap 2/3 * Windows/Mac OS/Linux Please feel free to contact me about more information and I'll share my CV with you. I have experience in analysis, estimate, architecture planning, test driven development, frontend development, backend development, API development, deploying and post production support, data scrapping and etc. I've worked with big distributed teams, with PMs, QAs, Analysts, worked by scrum technology. I'm familiar with popular bug tracking systems such as JIRA, Trello, Podio, Basecamp and etc. Email, Skype, Slack, Hangouts to direct communication with client. I can create any app from scratch or join an existing project. Feel free to contact me about any ideas you have! Thanks!

$44.44 /hr
524 hours

Alex Fortuna

Alex Fortuna

Lead/Senior Ruby on Rails Developer, Mentor

Russia - Tests: 9 - Portfolio: 3

I've been developing in a variety of languages on different platforms over the last 15+ years and I'm still enjoying it. Programming is my lifelong passion. The things that excite me the most as a developer are those innovative, unique and technically tricky. The things I try to achieve as a team leader are just these: efficiency and harmony. I see a successful product as a harmonic combination of well-designed software AND a well-tuned team involved in its creation and subsequent development. As Upwork freelancer I specialize in dynamic Web application development using Ruby on Rails and JavaScript (AngularJS, React.js), commonly in a position of CTO or lead developer. I prefer to do base/architecture stuff myself and direct the team to do regular parts. I've got all sorts of experience required for both hands-on work and mentoring: 15+ years overall development, 9+ years Ruby, 7+ years Rails, 10+ years Unix/networking, 5+ years Git, TDD, etc. etc. I believe that QUALITY is the key priority if you want sustained growth. I provide it, I motivate or otherwise make others provide it. It takes time? Yes, but... "Good cooking takes time. If you are made to wait, it is to serve you better, and to please you." ——— Keywords and samples ——— Solid, long-term, clean, well-documented, maintainable, resilient. Please read my clients' reviews for more live keywords. Also, please take a minute to look at my code samples: There are also some open source contributions in the neighboring GitHub repositories. ——— The DO statements ——— If any of these statements are relevant to you, please DO apply as we'd probably get along together nicely: * "We had tough experience with Indian developers in our previous project. This time we want to begin by building a solid base which would guarantee us stable growth for the next 3-5 years." * "We have an ongoing issue in our distributed team: every time a developer leaves, the new one spends weeks becoming familiar with the project. We need someone to take care of connecting new developers smoothly." * "We like our current developers, but they seem to try new fancy things out of boredom or curiosity. We want to balance it somehow to stop losing momentum because of thoughtless fun experiments." * "Our current developers are okay writing code, but they get annoyed when being asked to explain or describe something, even to one another. We want a lot more sustained awareness and shared vision between our team members." * "One of our developers likes Apple, another one is a PC/Linux man. Both are great, but they keep arguing over their preferences which is a productivity killer. We want someone with authority to deal with them both." ——— The DON'T statements ——— If any of these statements sound true, please DO NOT apply since I'm probably not good enough for you: * "We'll start our new project with cheap student developers. It's then easy to invite a senior guy for a week or two to correct all of their mistakes." * "We don't need any written specs or documentation. We have Agile, Scrum, XP, pair programming and Slack chatroom instead." * "Writing project description is a waste of time. We'll start posting Scrum stories right away. A good developer should read our mind." * "We'll use NoSQL in our new project. Why? We don't know, but blogs are full of statements that it's better than SQL." * "We've just completed the visual design of our new application. Now we need someone to write code for it, which is a trivial technical procedure." * "We believe that this alone guarantees our code to be clean and solid: keeping methods shorter than 5 lines and keeping classes shorter than 100 lines." * "We've had a lot of trouble managing distributed teams. This time we want ONE great developer to handle everything. We can definitely control one person." Thank you for reading this far. If you're interested, post a job for me or send me a message. Cheers!

$37.00 /hr
2,497 hours

Miroslaw Maziarz

Miroslaw Maziarz Agency Contractor

Senior Ruby on Rails Developer with Passion

Poland - Tests: 8 - Portfolio: 9

I have more than 8 years of experience in commercial web development. Over the last 7 years I have developed a variety of applications using Ruby On Rails, JavaScript, TDD, SASS, PostgreSQL, MySQL, Amazon EC2, Rackspace and Heroku. I am focus on productivity and quality; I am among the top 10% freelancers who passed the tests in RubyOnRails, PostgreSQL and Internet Security. I am interested in building the best quality software that means well designed, easy to maintain, easy to extend to a new feature and well tested with autotests. Please find my skills & experiences below. - Ruby on Rails - Frontend (Javascript / jQuery / CoffeeScript / Backbone / Bootstrap / Angular / HAML) - Node.js - Web Browser Extension Development (Chrome, Firefox) - Database (Mysql / PostgreSQL / MongoDB / Redis / Memcache) - 3rd Party API Integration ( Google Map API, eBay, Amazon, Paypal API ) - Github / Bitbucket / AWS / Heroku / Engine Yard - Server Management

Groups: Engine Yard Ruby on Rails Professionals Network

$36.67 /hr
5,768 hours

Artem Fedorov

Artem Fedorov

Senior Full-Stack Developer - Ruby on Rails

Russia - Tests: 3 - Portfolio: 4

With experience in programming for over 14 years, I've been doing Ruby & Ruby on Rails web development for the last 4+ years. I love concentrating on the end result and final polish - that's what user will see and interact with. As a result of this thoroughness and attention to detail, my open-source history viewing plugin for Miranda IM ( became Miranda's de-facto standard. In addition to ruby, I know and use the following frameworks/technologies: CSS, AJAX, HAML, SLIM, SASS, SQL (MS SQL, SQLite, MySQL, PostgreSQL), NoSQL (MongoDB). My main expertise is Ruby (and Rails) - I've got 2nd place in oDesk Coding Challenge among Ruby developers. Also, I'm in the top 10% in Ruby and Ruby on Rails tests on oDesk. My projects do deployment, server provisioning and production error reporting automatically. I use Capistrano to deploy projects, Ansible for server provisioning and New Relic with Airbrake or Rollbar to monitor app in production. I can read other languages, like php, java, perl, python, c/c++.

Groups: Coding Champs, Upwork Verified Developers

$80.00 /hr
117 hours

Andreas Braun

Andreas Braun

Senior Developer in Frontend / Ruby on Rails / WordPress / MVC

Germany - Tests: 11 - Portfolio: 7

Hi, I am a senior web developer with 10+ years experience. I have developed a wide range of websites. I am always trying to deliver high quality solutions before deadline. I have strong skills and good experience in the following areas. - Ruby - Ruby on Rails Refinery CMS, Spree RSpec,Cucumber,TDD,BDD Various Ruby Gems, - PHP ( OOP ) MVC : Symfony, Laravel, CodeIgniter, Zend CMS : WordPress ( Theme development & customization, Plugin modification ) - Front-End: HTML/CSS, Twitter Bootstrap, Foundation JavaScript, Ajax, Coffeescript, HAML, - JS Framework: AngularJS, D3JS, NodeJS, EmberJS - Database: SQLite, MySQL, PostgreSQL, MongoDB I am looking forward to work with you!! Thanks for your time and consideration.

$38.89 /hr
56 hours

Maksym Skliarov

Maksym Skliarov

Senior iOS and Ruby on Rails developer, 5+ years of experience

Ukraine - Tests: 7 - Portfolio: 1

Over the last 5 years I was building iOS apps with Ruby on Rails backend on daily basis, 11 years total in programming on different languages: Swift, Objective C, C, Ruby, Python, bash, Pascal, Delphi, Assembly (Assembler, ASM), Processing. Also I build Mac OS utility apps time to time. I really like my job and iOS with Ruby on Rails makes development process very fast and enjoyable. Here is the list of major technologies I use (I like to learn new technologies too): - social SDKs: Facebook, Twitter, Google Plus, LinkedIn, Vk, Upwork, Elance; - cloud storages: iCloud, Amazon Web Services, Parse; - push notifications: Urban Airship, Parse, Infobip, custom web services; - analytics: Flurry, Adjust, Google Analytics, Fabric (Crashlyticts), Urban Airship, Parse; - payments: Paypal, Balanced payments, Braintree, Stripe, LiqPay; - SMS and voice: Twilio, Nexmo; - maps: Google, Apple, Yandex, Open Street Map; - databases and RDBMS: - on iOS: SQLite + CoreData, Realm; - on Ruby on Rails: PostgreSQL, MySQL, SQLite; - custom UI controls: custom transitions, animations, customization of default UI controls; - web: HTTP requests, development and usage of RESTful JSON and XML APIs; - RESTful JSON API: Jbuilder, RABL, MultiJson, YAJL, Oj; - HTML template engines: ERB, Slim, HAML; - stylesheets: CSS, SASS, SCSS, Twitter Bootstrap, FontAwesome and many others; - JavaScript libraries: jQuery, Angular, React, Twitter Bootstrap, HTML5Shiv, Respond.js, Highlight.js, CKEditor, TinyMCE, Owl Carousel and many others; - deployment of Ruby on Rails projects: VPS, Heroku; - programming design patterns: MVC, Active Record (Core Data), Singleton, Decorator (Category, Delegation), Adapter (Protocols), Observer (Notifications and Key-Value Observing), Memento (saving and restoring state of object), Facade; - programming principles: REST, DRY, KISS; - version control: git, SVN (I prefer git). Please, check my portfolio here: to see my latest published projects. Thanks for reading this! Best regards, Maksym.

Groups: Application Developers Alliance

$50.00 /hr
970 hours

Yuriy N.

Senior Ruby On Rails (RoR) + JS developer, Team lead, Tech lead

Ukraine - Tests: 1 - Portfolio: 2

Experienced Ruby and Rails developer, Team leader. I have experience in building a whole circuit of development process starting from developer hunting, organizing team and application architect to releasing and supporting finished project.

$60.00 /hr
5,126 hours