I recently attended a two part interview that put me in an unexpected situation. The interview consisted of a general interview (which I think went very well) and a technical interview a few days later.
The position I'm applying to is that of a front-end developer. However, the interviewer for the technical part was a back-end developer with very little experience regarding the position I'm applying to.
This meant that after a few generic questions (e.g. what kind of projects do you work on in your free time, what interests you about this field and so on) the interviewer ran out of topics.
I tried to discuss some recent interesting developments in the field, but the details seemed somewhat lost to the interviewer (as they're a specialist in a different field) and all in all it ended up being the shortest interview I've ever attended.
So the question boils down to this: What should I do in a situation like this? How can I prove my proficiency in a technical interview where the interviewer isn't familiar with the field?