Thanks for posting the requirement over the Freelancer.com & providing opportunity to team like ours to showcase talent & skills.
We have an excellent team of developer & Testers who have been developing applications with User experience in mind. Please refer to the link below to view our recent work in Ruby on Rails.
http://5.9.78.171:8001/#!/mobiles?Brands=Apple
Not only we measure user experience from standard browser based application, also, we measure from device basis as well. That means, we make sure that the application's user experience is good with respect to devices as well. So, we make sure that Bootstrap has been used in the best possible way so that application works well in any device.
Our expertise lies in : Ruby on Rails, PHP, YII, Zend, MySQL, MongoDB, HTML, Bootstrap.
If our profile suits you, then do let us know.
Warm Regards,
Subtlelabs Team
---We see success through our customer's eyes---