Well I've worked with people who mostly did that, but their situation is often that they were hired as junior developers with no experience, and then carved out

Well I've worked with people who mostly did that, but their situation is often that they were hired as junior developers with no experience, and then carved out this niche for themselves. I have no idea how one would go about getting hired into a company with this as their expressed goal. I remember one developer like this who joined our company with some previous experience, and left after a year or two, so it's definitely possible. FWIW I think it's unlikely to be seen as a very valuable skill by most companies, because, as you have probably already seen, most employers value higher-level decision making skills more.