Backend for Mobile game - repost

Objective We need to create the backend for a mobile-ready game. This backend must only be made by using webservices (no frontend required) Requirements The backend will be developed with Ruby on Rails, and the WebServices will be REST with JSON. Database is going to be MySQL. The development needs to be made with TDD. We don’t need many WebServices, and further details will be given to the developer in charge of the Project. These are the most important WebServices we are going to need, as an example: - SignUp with unique id, name, surname, phone, etc. - Login - Retrieve Highscores - Post Highscore - Challenges between users (three or four different calls: retrieve open challenges, accept challenge, post score to challenge, get challenge result) All comunication must be secure, so it’s up to the developer to think the best way to create a safe client-server communication channel. It’s also up to the developer to think and develope the needed caches for the WebServices that we consider critical (like retrieving highscores, open challenges…). The app should be also scalable. Final details on the required WebServices will be given to the developer. With all the information, the developer will make us a proposal with the design of every WebService, data tables, algorithm or ideas to secure the operations and cache strategy. After that, we will make any changes we consider to that proposal (if required) and the development of the product will begin.