Indeed, the title is startingly misleading, but it's par for the course.
It seems that "Engineer", in the context of hiring, for anything YC-sponsored, means programmer. Even "Work at a Startup" was (and likely still is), exclusively for software engineers.
This is despite the fact that YC actually accepts/funds companies that aren't pure software plays.
On TripleByte - they should make it clearer that the platform is only for the Bay Area and Software Engineering.