[lcestari]

You should try http://www.quora.com/ . There you can even ask to people you consider expert. About the undecided things, This will depend also where live, like you can choose Node.js but there isn't (almost) nobody that that works with that near you, then you would need to hire someone from another state/country. RoR would be pretty good for the factor it is already well known and if your case yours requirements is the speed to create a product. Node.js and others (like Java, Scala, etc) you could get a better performance, but it could cost more and time more time. I would not recommend hybrid mobile plataform such phonegap or HTML5, unless the time contracts is short and the user requirements are very low. You can use http://phabricator.org/ as bug tracking and sonarqube (like http://nemo.sonarqube.org/ ) to QA over the code.