In my 45 years in software I have never heard this term before. It is pure fantasy.
RSE is someone who writes (readable, reusable and maintainable)
They are looking for someone to clean the mess?
Yes GIGO
"A
Big Ball of Mud is a haphazardly structured, sprawling, sloppy, duct-tape-and-baling-wire,
spaghetti-code jungle. These systems show unmistakable signs of unregulated growth, and repeated, expedient repair. Information is shared promiscuously among distant elements of the system, often to the point where nearly all the important information becomes global or duplicated. The overall structure of the system may never have been well defined. If it was, it may have eroded beyond recognition. Programmers with a shred of architectural sensibility shun these quagmires. Only those who are unconcerned about architecture, and, perhaps, are comfortable with the inertia of the day-to-day chore of patching the holes in these failing dikes, are content to work on such systems."
-Brian Foote and
Joseph Yoder, 1997