SQL
The core skill every data role tests for — here's the range, from query basics to FAANG-style analytical problems.
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PySpark
Beyond syntax — partitioning, skew, streaming, and the performance problems that separate SQL knowledge from production Spark experience.
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Join Free Community FREEData Modeling & Architecture
Two different muscles — designing the schema before data exists, and designing the pipeline before the system breaks under load.
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We're building this out next. Until it launches, the free community gets weekly interview questions, monthly challenges, daily job updates, and curated resources you won't find bundled together anywhere else — completely free, no catch.
Join Free Community FREEGuesstimates
No code here — just structured business reasoning. The framework matters more than the final number.
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Join Free Community FREEClaude AI & Agents
Not interview prep — applied AI fluency. Seven modules, from everyday productivity tasks to building deployable agents.
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Join Free Community FREEThis is shaping up to be its own Gen AI & Agents Mastery track.
Cloud & Big Data
Beyond writing the query — the cost, security, and resilience decisions that define whether a system survives production.
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We're building this out next. Until it launches, the free community gets weekly interview questions, monthly challenges, daily job updates, and curated resources you won't find bundled together anywhere else — completely free, no catch.
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