If you are full-stack it probably seems obscure, and fortran seems outdated. But depending on your country, if you are safety critical embedded it is potentially the only option. It is in the top 2-3 in any case.

Edit: to finish my thought, if you are in physics or meteorology fortran is still common as well. There are a lot of software niches, and full-stack web dev is just the largest, at least as represented at HN, embedded might have more people if you combine planes, trains, automobiles, industrial, manufacturing, and more visibly IOT.