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How to design a data warehouse: facts and dimensions, star and snowflake schemas, the four design steps, and the choices that keep queries fast.

Meta software engineer levels explained: E3 to E10 with titles, salaries, years of experience, the up-or-out rule, and why E5 is the terminal level.

Google software engineer levels explained: L3 to L10 with titles, years of experience, salaries, promotion timelines, and what the terminal level really means.

Apple ICT levels explained: ICT2 to ICT6 mapped to industry titles, years of experience, and salaries, with Google and Meta equivalents and negotiation tips.

Twenty API gateway interview questions with answers: what a gateway does, gateway vs load balancer vs reverse proxy, rate limiting, auth, and failure handling.

A chapter by chapter look at Grokking Modern API Design Interview: the 8 chapters, 76 lessons, who it suits, and what it does not include yet.