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

Associated with: Rocket Mind Software

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

Anton Kolomiychuk

Anton Kolomiychuk Agency Contractor

Senior Ruby On Rails Developer

Russia - Tests: 3 - Portfolio: 4

Hi, glad to see you here! I'm a Team Lead and Fullstack Senior Ruby Developer. I'm specializing on high-level application architecture design, prototyping and writing solid testable code. I'm prizewinner into 2 Upwork coding challenges (oDesk's Coding Challenge and Upwork Code It Up). When I have time I contribute to opensource projects. GitHub - akolomiychuk. I'm Team Lead and Lead Developer in SmartDev. We're a fullstack developers who focus on Ruby on Rails and Yii. Besides that I'm good at establishing development workflows in existing teams - ask me for the case study! One of projects: I and my team created custom CMS and online ticketing platform for Australian company SEMIPERMANENT. Project launched in 2012. At 24 July 2014 it had 5613 sold tickets on events for designers on 3 continents and we continue improving it. I want to make products for real people. So I do not work with projects in which I'm not believe. I put my soul into every project, so it's important to me. The same way I'm not working with projects where the deadline is yesterday. I believe that deadline - it's when someone seriously messed up. I'm - about calm and confident way to move towards the goal. I'm Ukrainian, who live in Siberia - the center of Russian outsourcing. If you see anything how I can help you - feel free to drop me a line! Take care!

Groups: Coding Champs

Associated with: PurrWeb

100% Job Success
$32.99 /hr
2,174 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.

Associated with: Polcode

95% Job Success
$32.00 /hr
4,499 hours



Senior Ruby on Rails| BitCoin |Blockchain Ninja

Pakistan - Tests: 2 - Portfolio: 4

If you're looking for the cheapest - someone who'll cut corners to save a few minutes' work - you'd better look elsewhere. I am 4+ years experienced RoR | TDD | Spree eCommerece Expert developer. I love to write clean,manageable and readable code with Rails and like Test Driven development and enjoy on deploying web applications on cloud servers. I am interested in building quality software. I do not write code that just work, but also well designed, easy to understand, maintain and extend in the future by using test-driven development (TDD). ROR Expertise: Spree eCommerce | TDD | Rspec| Capybara |Google maps Api V3 | Gem Working and customization Experience: Gems: ● Devise(Authentication) ● Can Can(Roles authorization) ● FB open Graph API | Omniauth ● Paperclip(image upload) ● carrier wave(image upload) ● Refinery CMS(Content management) ● comfortable-mexican-sofa CMS(Content management) ● Spree(eCommerece) ● Rspec / Cucumber (TDD / BDD / TAD) ● Capybara (Acceptance testing) ● Redmine(Management tool) ● Active admin(Admin View) ● Stripe(Payments) ● BitCoin [Buy,sell,accept,send](Payments) ● Rails admin(Admin view) ● Google Api V3(google maps) ● Whenever(Cron jobs) ● Elastic Search(Searching) ● Thought bought(Code standards) ● Capistrano(App deployment) ● Fog(Cloud Api for saving images on amazon) ● Obviously many many more

Groups: Engine Yard Ruby on Rails Professionals Network

Associated with: Coder+

100% Job Success
$35.00 /hr
1,649 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!

100% Job Success
$37.00 /hr
2,481 hours

Heinfried K.

Heinfried K.

Senior Web Developer/AngularJS, Ruby on Rails

Germany - Tests: 4 - Portfolio: 4

I am an expert full-stack web developer with AngularJS and Ruby on Rails. With 10 years of experience on web developing, I have enriched the skills on several back-end frameworks and Javascript libraries. My technical proficiency includes demonstrated expertise in - AngularJS, D3.js, Backbone.js, React.js - Ruby on Rails, Python/Django, PHP, Java - Node.js, Express.js, Bower, Grunt, Gulp - MySQL, PostgreSQL and MongoDB - Developing and integrating RESTful APIs - RSpec, Cucumber, Capybara, Jasmine, Protractor - AWS, DigitalOcean, Heroku, Github, Bitbucket - Web scraping I pick up your ideas and implement them in most cost- and time- effective way. If you want to build smart, robust, flexible web apps, I will provide you best solutions with my skill, experience, honesty and reliability.

96% Job Success
$50.00 /hr
2,414 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

100% Job Success
$80.00 /hr
117 hours

Evgenii P.

Evgenii P.

FullStack Ruby on Rails / Ruby and React.JS Senior Developer

Russia - Tests: 5 - Portfolio: 6

I'm the one of the TOP 10% Upwork Ruby, Ruby on Rails and JavaScript developers. My programming experience is more than 6 years. 4 years of Ruby/ Ruby on Rails / JS development and 2 years of React.JS development. I'm the one of a few developers who can jump in to any phase of project life cycle with full efficiency. I can work with big team or be independent developer. I can grant you that your project will be successfully finished to production stage without unexpectable situations. I can develop wide range of applications, modules, services and web applications in Ruby on Rails / Ruby / React.JS. My code is always clean, high-quality and easy-to-support. I use TDD to be sure that my apps stable and can be refactored or extended. So, my apps are dependable and pretty easy to extend with any new and unexpected functionality. My strong points are my Dependable, Creativeness and Punctuality. My #1 goal will always be to meet your needs and deadline. When I'm 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. I'm honest and fair. Thank you in advance for your time and consideration. I look forward to working with you soon. Please take a look on my professional skill above and on my portfolio. Technologies - Ruby (1.9.x / 2.x), ruby ​​on rails (3.x / 4.x), Sinatra - Javascript / CoffeeScript / ES6 (jQuery, Lodash, React + Flux, BackboneJS, MarionetteJS, a bit of AngularJS) - Tests: RSpec, Minitest, jest - SQL (PostgreSQL, MySQL, SQLite) - Twitter Bootstrap, MaterialUI - preferably Git (+GitFlow), also CVS, SVN. Knowledge/Skills - OOP, MVC, SOLID, GRASP - High performance, quick learner - When writing code, I use Agile methodology, TDD, BDD, DDD. - scope of work estimation and timing, delivering the work on time without further reminders - refactoring and clean code writing Software stack - Linux (Ubuntu/Debian), packages installation/configuration - Remote work on servers via SSH connect - for developement I use Vagrant with Linux-based system as close to real production server as possible - Unix shell (ZSH/Bash, Vim, Tmux) to work with Ruby and JS, Git - Bundler, Rake for development on Rails - Npm, Grunt, Bower, Yoman, Gulp, WebPack for JS development Experience - Creating, modifying and integrating API (REST JSON) - Micro Service Architecture - embedding full-text search with ElasticSearch and Sphinx - websites parsing, Mechanize + Nokogiri - writing from scratch - improving gems - Sideckiq, Redis for background data processing - Unicorn/Puma/Rainbows for Rails server - pub/sub messaging with Faye and - environment deployment and DevOps using Ansible - Nginx customization - deploying with Capistrano - Travis-CI / Jenkins-CI for continuous integration - catching errors with Airbrake and automatic sending to Errbit - Redmine, Trello for project management

100% Job Success
$42.22 /hr
673 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.

88% Job Success
$40.00 /hr
51 hours