Speaking for myself as a hiring manager I'm not looking for specific tech stacks. I'm looking for general patterns. Someone who has spent their entire career doing front end work is unlikely to be a great fit for embedded development and vice versa, but I don't care so much about the specific technologies they used in the process.
My experience has been that concepts and fundamentals trump specific tech stacks. However I also take a longer range view of things. I care far less about relative productivity of two candidates a month from now than I do a year from now.