I had the opportunity to present at OSCON 2018 this year. My session was Herding cat pictures: How to develop, deploy, and operate services at Reddit scale. I talked through our rapid growth as an engineering org, some of the growing pains that resulted, and how we shifted our Infrastructure team from operations to enablement.
Thanks to some excellent work by the Helm Summit organizers, we have recordings for all of the sessions. I've posted mine (Helm at Reddit: From Local dev, staging, to production) for your enjoyment/merciless criticism/amusement.