I used to work on Compute Engine itself. I led the team that built and launched Preemptible VMs, and I still participate in its upkeep / improvements. So I generally still write little bits of code that nobody else wants to (especially monitoring and other cleanup type work).
About a year ago we started an Office of the CTO with me as the first "hire". So I transitioned from building new things and writing code much of the time (Note: Many at Google will snicker at this, as I am routinely teased for being a pseudo-PM) to talking to high-profile customers most of the time (think CTO / VP Eng types). We usually talk through where they are, what challenges they have, and whether or not GCP can actually fulfill their needs today (and as my group focuses on candor, we certainly say "You shouldn't migrate to us until we do X, Y, and Z, or you rewrite Foo").
I just hang out on HN as I like the dialogue :).