Miroslaw Maziarz

Miroslaw Maziarz

Senior Ruby on Rails Developer with Passion

Sandomierz, Poland



What's the difference?

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 n…


Miroslaw Maziarz has added 7 portfolio pieces. Create an account to review them.

Work History & Feedback

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 hrs @ $36.67/hr
Earned $7,915

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 hrs @ $27.78/hr
Earned $17,931

Ruby on Rails code interview for Learner Management System

No feedback given

8 hrs @ $36.67/hr
Earned $299

FAST AND EXPERIENCED DEVELOPER WANTED (Javascript, Ruby on Rails, Chrome Extensions)

Job in progress

457 hrs @ $36.67/hr
Earned $16,587
Tests Taken
Name Percentile Score

Internet Security Test


PostgreSql 8.1.3 Test


Ruby on Rails 2.3 Test


Ruby on Rails Test


Ruby on Rails Test v1 (Old)


U.S. English Basic Skills Test


Unix Test