Nikolay, this is a nice series of articles! In regard to this one, the name system architect is a bit confusing: in industry, but not necessarily in ‘IT” a system architect is the architect in a multi-disciplinary environment (think for example buidling medical equipment, or complex manchinery). Putting the name down here as the ‘lowest level’, most technical guy may not be convenient. A systems architect in the role I mention, which is widely accepted, is more like the multi-disciplinary version of the enterprise architect, with a lot of experience, both in business and technology. See also the works of my former colleague Gerrit Muller, now professor of systems engineering at Buskerud and Vestold University on this subject:

CEO at Schinchoku and software architect at Delphino Consultancy B.V. — writing about software, and about the Shinchoku startup.