Comment by jordanab

In Western Europe at least, I think you would have a much better chance if you were applying for a .NET, Java, or PHP position (which given your C experience, you should be able to master any of them). Golang has a much smaller market share here, so that is very limiting (even for younger devs). Most .NET and Java companies I work for would still happily hire experienced senior developers in their 40s or 50s.