“How do we get developers to actually use our platform?” Once you have your platform set up, you have to build up what is essentially a full marketing plan to drive interest in and use of that platform.
You’ll probably start with just one platform advocate who visits with developer teams throughout your organization listening to what these teams do, teaching them how to use the platform and associated methodologies and listening to their feedback.
Having developers tell other developers that your platform is good, great even, will be the best way to get developers to use your platform, and use it well.
I haven’t seen many platform teams (or any, perhaps) that have scaled and sustained their developer platform without platform marketing.