Scenario Codepush Offline Ui Analytics Tablets Downloads React Native Interview 18 15

Summary

The user submits a form in a tunnel with no signal. It must not be lost. Takeaway: Millions of users, dozens of developers, hours of Log in with your face, switch to festive mode, trust every byte in transit, and pull down to refresh. Four features users expect. Tokens that must never leak, an app that slows down after an hour, notifications that must arrive while it's closed, and three ... Users on old versions, users in three languages, users with screen readers, and users on slow Crashes you can't reproduce, dark mode that must switch instantly, and a search box that hammers your API. Everyday production ... A payment gateway that only exists as a web page, a sync that must never corrupt data, and a scroll effect that must stay smooth. Show the user's location, render ten thousand grouped contacts, add The interviewer stops asking definitions, and asks: your app feels laggy, what do you do? This is where offers are won. Takeaway: ... A profile photo upload, a form that grows when you pick business account, an app that opens too slowly, and a submit button ... Pause tracking in the background, wipe everything on logout, turn cryptic errors into helpful messages, and catch a bad email ... Product wants a payment SDK that only exists for One codebase, ten brands. Thousands of animated list items. Takeaway: White-label = config, never forked core; heavy lists ...