Can you describe a time when you had to make a decision with incomplete information? What was the situation, and how did you handle it?

In my first year, I was adding an integration to a third-party billing service, and their documentation did not match the responses I saw in the test environment. I needed to decide whether to keep building against the docs or pause and risk slipping my part of the release. I reproduced the issue with a small test, checked how a similar integration worked elsewhere in our codebase, and then asked my mentor a very specific question instead of just saying it was confusing. Based on that, I implemented the safer path that preserved the old behavior if the new call failed, and we released it behind a flag for internal users first. That let us confirm the real behavior before turning it on broadly. The docs were partly wrong, but because we had a fallback and a limited rollout, we avoided customer impact and I wrote up what we learned for the next person working with that vendor.

At a small consumer startup I worked on a redesign of our profile settings page where the product manager wanted both a simplified layout and a lot of advanced options, but we didn't have user research to say which users would prefer which approach. With a two-week deadline I built two lightweight prototypes, asked five colleagues and two customer-support reps to try common tasks, and timed how long it took them to complete each task while noting where they hesitated. The informal tests showed the simplified layout was faster for the majority and produced fewer questions from support, so I implemented that as the default and hid advanced options behind a clearly labeled link. After release I monitored support mentions and a small in-app survey; the feedback matched our tests, and I wrote up the experiment and results so future design decisions would have clearer criteria.