Sponsors Lightning Interview #2
summary
A music-app company reports 315 million downloads across about 15 modern apps and spends three years building a constant system that now runs regular development of new apps. Choices are concrete: Swift for UI work and Objective‑C when calling C/C++; prefer CocoaPods and reserve Carthage, use vim in the terminal, pick UICollectionView over UIPickerView, favor standard keyboards not Touch Bar. The claim centers on scale and a reusable system that actually ships.
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