I've recently started listening to The Changelog [1], which I like. Generally the discussion is pretty interesting, though I think sometimes it could benefit from a bit more subject-matter expertise from the interviewers - though, to be fair, they're cover a lot of languages and technologies.
Some recent episodes have covered:
- React / React Native / Flux / GraphQL with some Facebook people
- Elixir language and Phoenix web framework, with the creator of Phoenix
- Spark (the IOT hardware, not the compute framework) with its creator