A) See if they're open to continuous improvement, organize (or have your boss organize) a post-mortem on why the situation got to the point you had to sacrifice

A) See if they're open to continuous improvement, organize (or have your boss organize) a post-mortem on why the situation got to the point you had to sacrifice your life to cover for bad earlier decision. What errors were made? What changes need to happen for this not to ever happen again? If attribution goes to bad management, and decisions are made to make the situation better, then you can give them a chance. If the developer is to blame and seriously it was such a simple project why could you not deliver it faster, then you know you need to go. B) The other red-flag is in the "under resourced" - if no resources are put on the table, then it certainly is not a big deal if you're late. It's very scary to be late, but what's the actual problem if you are? Will you get fired? Will the company lose M$? Or is it just a product/project manager putting too much pressure on you, and making you do things they should not?