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Source: Techniques to Make Database Integration Tests Fast Enough for Developers to Actually Run Them There is a particular kind of dread in a codebase when a developer hears "run the integration tests" — it sounds like a half-hour ritual of waitin...

Source: Reasons Your Unique Constraint Is Not a Complete Concurrency Strategy You shipped a system where a unique index guards a business invariant. For a while everything looked fine: a unique constraint rejected duplicates, your logs showed an oc...

In real systems, APIs don’t fail gracefully by default. Without discipline, you end up with: Different response formats per endpoint Unclear error messages Controllers full of try-catch blocks This article explains how we design predictable, consis...

Most Spring Boot tutorials teach you how to build an API.Very few explain what actually happens when a production Spring Boot application starts — and why those internals matter when systems grow. This article documents how we actually understand and...
