What achitecture do you use in your node.js applications?

I just faced this question in an interview: What is the project organization that you prefer in your application?

I answered that it depends on the the complexity and the size of the project and the experience of the team and I'm used to choose the standard one:

   server.js
   app.js
   models
      |-- model.js
   controllers
      |-- controller.js
   routes
      |-- routes.js
   config.js
   tests
      |-- test.js
   utils

But I don't think that the interviewer liked this answer and this strategy and told me that they use the 3 layer architecture strategy. They don't mix the business logic with express controllers and they use services and controllers and models like mentioned in this example Bulletproof node.js project architecture. Any suggestion or any opinion is welcome.