I think it's mostly a confidence thing. Let me write out some facts: - You can obviously program pretty well with some 10 years of experience - You know one l

I think it's mostly a confidence thing. Let me write out some facts: - You can obviously program pretty well with some 10 years of experience - You know one language very well - You have made (side) projects in a different language so you have the ability to pick up something new and build something with it - N number of years experience on job listings is often not as absolute as it might seem - Learning a second language is not the same as learning your first, it's much easier as a lot of concepts are the same or similar > requisite skills (conventions, tool chains, libraries) I literally google all of it + I browse Github projects; find some bigger open source projects in your language, see what libraries they use, how they structure etc. > making the switch I just start using it for work projects. You could also just apply for a job and see how it goes. What matters in the end is; can you build [stuff] with it? If the answer is yes, great, you win. If not, maybe build some more projects. Obviously it's a spectrum but with your experience you are likely able to know if you can build enough to be useful. My guess is; you probably can.