[Too]

If you know the management is not technically competent, the responsibility also lies on the developer to communicate things on their level. If they ask how long will X take, you don't answer 1 day, and then another day to test it. You answer 2 days. If that's outside their budget then forget about that feature and let sales find a new feature they can sell that can be developed within the budget.

This also boils down to the ego thing, many junior developers are proud to give short estimates to show off how quick and good they are at their work. But those short estimates are always always always just the estimated time to get a quick prototype working, where things are configured as you go in the debugger, not something that is robust and will work together with the rest of the application in a customer deployed environment. Estimation is really where you can see the difference in an experienced engineer and a non experienced one.