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Lessons (4)

• CQRS & Event Sourcing

  … CQRS The big idea A restaurant kitchen and its menu board are optimised for different jobs. The kitchen …

• Big Data: ETL, Warehouses and Streaming

  … A data lake holds raw/flexible data; a warehouse optimizes governed analytical queries; a lakehouse combines lake storage …

• Database Indexing & Transactions

  Why some queries take 2 ms and others 20 seconds. Learn how B-tree indexes work, how to …

• Frontend Performance & Core Web Vitals

  … Understand LCP, INP and CLS, then apply the proven fixes, from image optimisation and code splitting to caching …