Quality of experience engineer
In my experience in the defense industry, the quality assurance engineers are mostly just “box checkers” that have limited understanding of how all of the individual facets of the algorithms and systems work. We have design engineers, integration engineers, and then the QA engineers. I have never seen an integration engineer or QA engineer get involved in any sort of design; the skill sets for each position are very, very different. It’s one thing to know what something is, but it’s something else entirely to be able to use it in a creative way to solve a problem.

Again, this is just my experience in the defense industry within the US. Other countries and industries may be a bit different though!