I'm want to write a documentation for my new module, and I was inspired by the docs of sentry.io, and I find out that they are using the Sphinx module, but the interface isn't the default one. Is there a way to change the template, or the sentry team made that for their own purposes?
Sentry has their docs open-sourced. See their documentation contributing guidelines and repository. However it is heavily modified, so you might want to start with something easier by using one of the themes that comes with Sphinx or try others.