Will irrelevant technologies ‘pigeonhole’ me

I just graduated with my degree in comp sci and am on the job hunt. One place (out of several) that I applied to was a junior full stack developer job. Some of the basic work responsibilities involve using things like html, css, typescript, ruby and the ruby on rails framework. I don't really want to work on front-end development nor do I just "want" to learn Ruby but I figure for a first job I shouldn't be too picky. When I got out of school I assumed I would find something in one of the more common languages like java, c#, python, etc.. My question is do learning certain languages/frameworks pigeonhole you from future job prospects? I don't want to apply to a mid-level java or c# job down the road but cannot be considered because I have experience in all of these other languages/frameworks. So finally, I guess an additional questions would be do employers care about titles/job duties more on a resume or the years of experience in their required stack/language?