Hello Zahar, we offer an iterative approach to protect the investments and guarantee our results. Also we expose all the development process to our customers. Our developers are high skilled in complex JavaScript, including OOP and prototypes, AJAX, integration, DOM, HTML5, Node.js. We really love to design the convenient applications: UX planning and responsive UI is what we always offer in priority. The work of our senior dev is $59/hr, for a junior it is $23/hr. It's up to you. You would see the dirty but operational software version for $800 in two weeks. Minimum Viable Product may cost about $4000 and be released in 1-2 months. If you are interested in cooperation with our dev team, we can discuss the details, and you'll be provided with a more specific and vivid proposal.
Sincerely, Pavel and my ExtPoint team."