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Werner Vogels traces how Amazon’s scaling challenges shaped its engineering culture, service architecture, and the creation of AWS. He explains how independent teams, customer feedback, working backwards, and small initial feature sets help Amazon build products while adapting to real usage. He also argues that cloud services can free teams from infrastructure work, but that security and cost choices need to be built into development from the start. The talk closes with advice for startups to choose architectures and cloud services that fit the kind of company they want to build.

Kat Manalac shares examples of companies founded by women in YC, then describes a book she recommends and the supportive YC alumni network. She advises founders to get products in front of real users, especially paying customers, before overbuilding. When evaluating startup applications, she imagines how a product might change the world at much greater scale over time. She also discusses YC-backed Australian companies and why a strong co-founder relationship matters.