A long time ago sonos didn't support apple airplay.
I did some protocol reversing and wrote a small program that pretended to be an airplay speaker to pipe audio to a sonos speaker (archive: https://github.com/stephen/airsonos)
I ended up getting recruiting messages from both the airplay team at apple and some folks from sonos. I didn't end up taking either offer, but it was also an interesting talking point when interviewing for the job I did take.
I did some protocol reversing and wrote a small program that pretended to be an airplay speaker to pipe audio to a sonos speaker (archive: https://github.com/stephen/airsonos)
I ended up getting recruiting messages from both the airplay team at apple and some folks from sonos. I didn't end up taking either offer, but it was also an interesting talking point when interviewing for the job I did take.