Miroslaw Maziarz
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Miroslaw Maziarz

Senior Ruby on Rails Developer with Passion


Sandomierz, Poland

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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 ... more/ 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 less

Miroslaw Maziarz has added 9 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Jun 2013 - Jun 2014

    Ruby on Rails code interview for Learner Management System

    No feedback given

    8 hours
    $36.67 / hr
    $299.47 earned

  • Nov 2012 - Feb 2013

    Ruby on Rails developer for custom web app
    Our project manager was extremely happy with Mirek's code. He met deadlines, made himself available whenever we needed to reach him, and has been extremely helpful.
    216 hours
    $36.67 / hr
    $7,914.87 earned

  • Mar 2012 - Jul 2012

    Senior Ruby on Rails Developer for SaaS Project
    Mirek is a responsible and diligent contractor, but not the right long term fit for our project.
    642 hours
    $27.78 / hr
    $17,931.45 earned

Miroslaw Maziarz has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
PostgreSql 8.1.3 Test 4.40 Top 10% 13 mins
Ruby on Rails 2.3 Test 4.10 Top 10% 13 mins
Internet Security Test 3.60 Top 10% 17 mins
Ruby on Rails Test v1 (Old) 4.00 Top 20% 27 mins
Ruby on Rails Test 4.25 Top 20% 6 mins
Unix Test 4.00 Top 20% 32 mins
U.S. English Basic Skills Test 4.25 Top 20% 26 mins

Work History

100% Job Success
5,556 hours worked
21 jobs


Less than 30 hrs/week


Phone Number: Verified

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3,071 hours


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