I don't have any connection to Galvanize now so I don't feel the need to defend or promote bootcamps, but I do feel like I have some knowledge on the situation. When I was instructing I was constantly worried about there being enough jobs for my students. This was also when the startup market was "hotter" than it is now. The thing that I came to realize looking back is that there is actually still a huge amount of steady demand for software engineers.
It isn't necessarily startups though. I have definitely heard from startups that they feel like they are inundated with bootcamp grads. I think part of the reason is because working at a cool startup is part of the picture that is painted to perspective students.
The less exciting (to the graduates) opportunity is working with big companies that are replacing their previous outsourced staff with internal junior engineers. They also didn't want to hire one or two grads, they were interested in hiring five to ten.
To me at least it seems like larger companies are trying to adjust their staffing to accommodate a more fluid staff that comes and goes rather than the longer term employees of previous generations. Which includes always having a broad opportunity for new employees, which dovetails into the bootcamps constantly producing graduates.