How do you build a "portfolio" when your management impact is invisible?
I've been an EM for almost six years now and lately I've been thinking about going back to being an IC. Partly bc the market, but also bc I just miss building stuff. But when I actually sat down to figure out how I'd present myself for that, I realised that this is actually not as simple. As an IC back then I had a commit history, projects, stuff I could point at. As an EM I've got… what? "Teams I ran went well, nothing broke, trust me."
Someone on here some time ago described EMs as having "weak external signals"; your impact ends up living in your old manager's memory. There is barely any relevant artefacts and basically no portable proof.
So for anyone who's gone back and forth, or who hires EMs: what actually counts as proof you were good at this? Is there stuff people do while they're still in the role to leave some kind of trail or just something to show for in general? Right now I am starting to suspect there just isn't, and it's a remember-and-retell thing you redo every time you change jobs. However I would love to be wrong on that.