I sit next to our support "team" pretty frequently :)
We've had a couple painful SSO integrations (when they were home-grown, as you correctly point out), but we've pretty much got the rough edges sanded down now. I don't think we've had a tough one in a while.
Slightly off-topic: If you really want folks to click through to your job ad, you can't go wrong if you mention that the salary range is ~$150k - $200k :-)
We are a bootstrapped, profitable, distributed team of nine very friendly humans.
We're looking for a strong C++ dev with experience creating great Linux apps to lead development of our new client (currently in alpha – launching publicly soon).