Website Design and Development project

We are looking for a creative and talented IT company who can confidently build and develop a marketplace website based on reputation. Users can post all sorts of projects and experts help manage their project from inception to completion. Website must be able to track proposals, project milestones and status, escrow payments, project activities and statistics with real time notification and updates. Full technical specifications will be provided to the winning bidder. See brief website details and requirements, below: Users can take on a project or can hire an expert (dual access) All user has access to their dashboard to see their historical activities (shown as timeline), data, documents and statistics. Users will be able to see real-time website updates for any new proposals and new questions and answers Over time, users can gain reputation through votes (up vote/down vote) and through consumer reviews. If the user has reached a certain number of points, user can unlock achievements such as user promotion or earn a user badge. Requirements: Design (Mobile ready) UI/UX design and flow should be simple, flat and full of functionalities Usability Responsive website development – fast data queuing and data caching, real-time data publish. Search functionality - must be able to show the most relevant display list of experts and or project based on given parameters Simple Reputation algorithm to calculate the overall reputation of every user based on consumer votes and reviews We want to hear your recommendations on how the website should be built with i.e. front end platform could be built with Laravel or custom built, suggestions on queuing and caching technologies to make the website load faster etc, how the reputation algo should be built i.e. ideally with Python and suggestions with search engine development i.e. build engine through Lucene (Java) etc all recommendations should be suitable for on-going maintenance and updates. Again, we are looking for a top notch IT company who can confidently take on this project preferably a company who has an extensive experience on large scale deployment and to be able to manage on-going updates and fixes. All interested parties must provide details on how long would it this project take to complete and your recommendation on the most efficient way of building this website.