I can add so many:

- Requirements are rarely clear from the beginning;

- We (DE) are not enabling self-service and automation so we are drowned in small requests (add this column for example;

- Upstream rarely notify us about the changes so we only know when downstream alerts us. We end up building expensive pipelines to scan and send alerts. Sometimes the cost of alerts > cost of pipeline itself;

- We have so many ad-hoc requests that sprint is meaningless. If I were the manager I'd abolish sprint completely;

- Shadow knowledge that no one bothered to write down. I tried to write down as much as possible, but there are always more unknowns than knowns;

Working in DE definitely gives me enough motivation to teach myself about lower level CS.

What does DE mean in this context?