Denis D.
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Denis D.

Talented Ruby on Rails developer


Berdsk, Russia


Seasoned web developer capable of managing technology projects from concept to completion with remarkable deadline sensitivity. Gained a lot of experience from working for start-up companies and small businesses. I am seeking opportunities where I can apply my expertise, and develop more and meet your business requirements. Core competencies: - Back-end Ruby (Ruby on Rails, Sinatra) - Front-end: jQuery, Backbone.js, CoffeeScript, HTML5, CSS3, SASS/LESS, HAML, Twitter-Bootstrap 2/3, ZURB-Foundation. - Database: relational databases (MySQL, PostgreSQL, SQLite), document oriented (MongoDB), key-value databases (Redis, MemcacheDB). - Version control: Git, Mercurial, SVN. - DevOps experience: Amazon EC2, Amazon S3, Elasticsearch

Denis D. has added 5 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Aug 2013 - Sep 2014

    Simple Ruby on Rails Booking Engine
    Great Programmer. Would hire again.
    253 hours
    $13.33 / hr
    $3,374.74 earned

  • Nov 2013 - Jan 2014

    RoR Dev Wanted to Build Admin System w/ Xero Integration
    Denis is a great freelancer and web developer. He is skilled and very fast with his work.
    55 hours
    $18.00 / hr
    $1,023.00 earned

  • Mar 2013 - Nov 2013

    Contractors Familiar With Addresses in Russia
    Fixed Price

  • Sep 2013 - Oct 2013

    Startup needs a landing/launch page
    Denis is amazing. Changes are made quickly and he takes initiative to addres small changes without direction.
    32 hours
    $18.00 / hr
    $609.00 earned

  • Aug 2013 - Oct 2013

    Ruby on Rails - Build our Design
    Denis was exactly the right person to complete my site. I had a small budget, but he still worked with diligence and did a great job!
    $65.00 earned
    Fixed Price

  • Aug 2013

    Simple Ruby on Rails Booking Engine
    Great Programmer. Would hire again.
    $120.00 earned
    Fixed Price

Denis D. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Ruby on Rails 3 Test 3.75 Top 20% 40 mins
JAVA Programming Skills Test (Hands-on programming skills) 4.05 Top 30% 51 mins
JDBC 2.1 Test 3.40 Top 30% 39 mins
Advanced Java Test 2.60 Top 30% 40 mins
Ruby on Rails Test 4.10 Top 20% 35 mins
Knowledge of jQuery 1.3.2 Skills Test 4.25 Top 30% 35 mins
AJAX Test 3.90 Top 20% 40 mins
JavaScript 1.8 Test 3.75 Above Average 45 mins
Java Test 3.00 Top 30% 38 mins

Work History

100% Job Success
921 hours worked
13 jobs


More than 30 hrs/week

Associated with

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emyoli Agency
2,280 hours

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