What is the free Backend as a Service platform with the ability to process requests with its own script?

Question

Android

Can you tell me a free Backend as a Service platform with the ability to process requests with your own script? I am doing a vote and I need to exclude the possibility of re-voting, I am reluctant to do a backend on my server or in the application code itself.

Answer 1

Parse.com allows you to cut your server side logic in JS.
The API also has a feature to increment values ​​in a table, which can make your task easier.
Backendless.com allows you to cut logic in Java, but I had problems with their server code