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Lessons (3)

• SQL vs NoSQL Databases

  Relational tables or flexible documents? Understand how each stores data, the four NoSQL families, ACID vs BASE, and …

• Authentication, Authorization & API Security

  … MFA, rate limiting, short token lifetimes Injection (SQL, NoSQL, command) ' OR 1=1 -- returns every row Parameterised queries …

• Data in Microservices: Sagas & the Outbox Pattern

  … can stay stuck. - Many modern systems (Kafka, most NoSQL stores, SaaS APIs like Stripe) don't support it …