Looking for an outstanding Ruby on Rails company for 4-6 months project

Job Description:

A young venture doing something REALLY COOOOL is looking for an outstanding Ruby on Rails development company to lead our R&D force for 4-6 months project.
We are looking for a team of 2-3 people with great passion for building great products to help us turn our dream into a killing product. The development requires both server backend development, and frontend web and mobile applications.

Job Requirements:
· Senior developers only, with at least 5 years of experience in web development.
· At least 2 years of experience in Ruby on Rails.
· Good knowledge in client side technologies (HTML5, JavaScript, CSS3) – Must
· Web Apps development for mobile devices using HTML5 - Must
· Vast experience with client side libraries, such as: JQuery, Sencha Touch 2, etc. – an advantage.

Start Coding: in 1-2 months time.
RoR Project references are mandatory

Please specify the requested hourly rate in your offer.