I don't think this is an example of keyword stuffing. I hire a lot on complimentary skills. I bet there's a lot of Ruby Devs out there who'd like to learn and work on an Elixir project.

I've even interviewed at some shops that were Rails-based, but since I had a lot of good OO programming experience, designed and built large-scale systems, had skills with other parts of their stack, I had a better overall skill set than some of their existing Ruby devs. And they accounted for this with part of their onboarding process to get me up to speed in their Ruby codebase....

Really? This is good news. I thought they just lured with Elixir but actually had a legacy Ruby app to maintain :)

I always assume the opposite.

They have at least touched Elixir code but most of your time will be spent maintaining and/or writing Ruby apps.