Int'l Proximity Search Tool

I'm looking to have an international proximity search that works with MongoDB. I do not want to use any of the API services out there like google, etc. The first preference would be for it built using ColdFusion. The second option would be for it to run on Node.js. If the code is done in node, you would have to be able to set it up on AWS LAMBDA where it works like an API. I would want to pass it a few parameters like city, state, country, zip code and radius and it would return all zip codes within that radius for example. The results should be returned with actual distance so that it can be sorted on with the closest being first.