I'm only learning to play correctly in mid-career. No amount of being good at technical stuff will get you promoted in most orgs—maybe to mid-tier dev levels, but not much higher. Being hyper-social, will. Not the normal amount of social you need to be to do a good job as a developer, but spreading out your "footprint" on purpose so you're known by and often interacting with a lot more people, even if those interactions are actually a drag on overall productivity. I've learned from observing others who are good at doing a lot of talking in meetings, and who eagerly start adding shit to people's calendars and stuff their first week. It fucking works. Reliably. Be bold, and be noisy. Get promoted.