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The engineer who quietly raises the bar wherever he goes

Valeriy Perederenko has spent nine years designing the invisible foundations that keep high-traffic mobile products runn ...
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I'm the CTO of a startup. Software engineering has changed so much that we've changed our hiring process.

This as-told-to essay is based on a conversation with Andrew Hsu, the cofounder and CTO of Speak, an AI-powered language learning app. The following has been edited for length and clarity. I'm a ...