Oleg Kalistratov
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Oleg Kalistratov

Senior Rails/Python + JavaScript Developer


Nizhny Novgorod, Russia


I solve problems. You can hire 2 developers for the same price, but once you run into an issue none of them can solve, you'll probably understand why 'cheaper' isn't 'better'. And no, I don't write code twice as fast as the others do. I work better, not faster. I specialize in developing rich web applications in Ruby on Rails (Python is also an option), HTML5 and JavaScript frameworks (Backbone, Ember). Some other tools/libs I use in my work: MySQL/PostgreSQL/MongoDB, jQuery, Twitter Bootstrap, HAML/SLIM/SCSS/Coffeescript, Git/Github, Heroku. My background also includes: PHP, C/C++ (system and desktop programming), Qt, .NET/C#, Android development.

Oleg Kalistratov has added 4 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Jan 2015 - Mar 2015

    The job was a bit complex to understand - which I learned from other freelancers interviewing for the job. Oleg understood the task immediately and delivered a solution surprisingly fast. I'm very impressed.
    9 hours
    $60.00 / hr
    $540.00 earned

  • Jan 2015 - Feb 2015

    Ruby on Rails Developer
    Oleg was flippin' awesome. Got the dev environment setup quick and had a prototype within hours of starting. Can't wait to work with him again.
    $800.00 earned
    Fixed Price

  • Oct 2012 - Mar 2013

    RoR Stock Trading Website
    We needed some very complicated web development. I was amazed how quickly Oleg understood our very obscure requirements. Although he was very responsive, I failed to find time to check in with him regularly during his development. That is why I was amazed when he delivered the product. He had the insight and intuition to fill in all of the subtle details that I failed to give him originally. He did everything the way that it should be done, with code that was clean, efficient, and fully functional. I have no doubt I will hire Oleg again in the future.
    93 hours
    $38.90 / hr
    $3,605.24 earned

  • Jul 2012 - Oct 2012

    UI & Front-End Dev (ERB, HTML(5)/CSS(3), JS with good Rails and Rspec Capabilities)
    Oleg has achieved beyond expectations and on a regular basis. He is a talented developer and someone you can count on to deliver quality solutions. His skills with front end development has really helped us achieve what we wanted to do with our website.
    233 hours
    $27.78 / hr
    $6,523.58 earned

  • Jul 2012 - Aug 2012

    expert HTML5/CSS3 coder
    I liked very much to work with Oleg, I will instantly hire him again when he has enough time...
    58 hours
    $16.67 / hr
    $975.20 earned

  • Jun 2012

    Senior Front-End Engineer
    31 hours
    $22.22 / hr
    $681.49 earned

  • View More (3)

Oleg Kalistratov has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
CSS 2.0 Test 4.60 Top 10% 25 mins
HTML 5 Test 4.40 Top 10% 33 mins
HTML 4.01 Test 4.50 Top 10% 32 mins
Ruby on Rails Test v1 (Old) 4.00 Top 20% 36 mins
Programming with C++ Test 4.00 Top 10% 31 mins
Programming with C Test 4.00 Top 10% 30 mins
Knowledge of jQuery 1.3.2 Skills Test 4.10 Top 30% 37 mins
JavaScript 1.3 Test 3.90 Top 20% 21 mins
PHP5 Test 4.25 Top 20% 26 mins
Java Test 3.10 Top 30% 39 mins
Search Engine Optimization Test 3.25 Top 20% 36 mins
U.S. English Basic Skills Test 4.00 Top 30% 29 mins

Work History

100% Job Success
2,948 hours worked
19 jobs


Not available until 01/01/2016


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