You see this often in German job listings, because the job title can intrinsically denote gender. For instance, Developer is "Entwickler" (m) and "Entwicklerin"

You see this often in German job listings, because the job title can intrinsically denote gender. For instance, Developer is "Entwickler" (m) and "Entwicklerin" (f). So employers tend to write something like "Web-Entwickler (m/f)."