I know people like this, I work on major public cloud products. Sometimes they are “staff” or other high level-titled.
But you have to recognize some of the projects you’ve listed are mostly notable because they are very well documented and have a lot of OSS (besides RTC) mindshare; there are just as technically challenging and valuable projects that are less well known because they are proprietary sold software.
But you have to recognize some of the projects you’ve listed are mostly notable because they are very well documented and have a lot of OSS (besides RTC) mindshare; there are just as technically challenging and valuable projects that are less well known because they are proprietary sold software.