> I’m confused what kind of software engineer jobs there are that don’t involve meeting with people, “aligning expectations”, getting consensus, making slides/decks to communicate that, thinking about market positioning, etc?

The vast majority of software engineers in the world. The most widespread management culture is that where a team's manager is the interface towards the rest of the organization and the engineers themselves don't do any alignment/consensus/business thinking, which is the manager's exclusive job.

I used to work like that and I loved it. My managers were decent and they allowed me to focus on my technical skills. Then, due to those technical skills I'd acquired, I somehow got hired at Google, stayed there nearly a decade but hated all the OKR crap, perf and the continuous self-promotion I was obliged to do.