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Learn a language by running it — every example runnable or compiler-verified, traced line by line, with the real errors explained.
Data & Analytics
Move, model, and query data at scale.
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From SQL fundamentals to production Spark, Kafka, lakehouse table formats, orchestration, and a full end-to-end pipeline.
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Learn SQL by running it — edit and execute real queries against a live database in your browser. JOINs, aggregations, window functions, and CTEs.
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Learn every Spark DataFrame function by running it — string, date, window, array, and JSON functions with editable examples and the N ways to use each one.
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Learn the Iceberg lakehouse table format by running it — create tables, time-travel across snapshots, MERGE and upsert, evolve schema and partitions, and maintain tables, with editable Spark SQL examples.
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Build real applications on large language models.
Forward Deployed Engineer
The complete course for the role every AI company is hiring for — customer discovery, integrations, applied AI with evals, deploying inside a customer's environment, security and operations. 13 modules, a capstone project and a certification exam.
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Learn prompt engineering by doing — edit real prompts and run them against a live AI model in your browser. Roles, few-shot, structured output, chain-of-thought, and more.
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See, understand, and debug production systems — with AI doing the heavy lifting.
Software Craft
The fundamentals that outlast any framework.
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