: Unlike a "shallow" feature (like a simple UI button), a deep feature must connect multiple layers of an application, such as linking a front-end component to a backend database via a secure API.

: Be prepared to answer probing questions about the underlying tech stack you used, such as database indexing or memory management.

Behavioral opening line

In the pantheon of modern professional mythology, few rituals are as storied or as feared as the lunchtime interview at Trader Joe’s. While investment banks grill candidates on mental math and tech giants subject engineers to whiteboard riddles, the specialty grocery chain asks something far more profound, deceptive in its simplicity but brutal in its execution: “What would you eat for your last meal on Earth?”