Software Architecture & Engineering

Configuring constructors through composable option functions, especially in Go APIs.

Using function values to satisfy small behavioral contracts and inject behavior without heavyweight objects.

Persisting domain changes as an append-only event history and rebuilding state through replay/projections.

Decoupling event publishers and subscribers while handling delivery, ordering, replay, and failure semantics.

Decoupling work generation from processing with queues, bounded capacity, backpressure, and worker concurrency.

Designing stable boundaries so common extensions require less modification to trusted core code.

Ensuring subtypes preserve the behavioral contract expected from the base abstraction.

Keeping high-level policy independent from volatile low-level implementation details.

Grouping behavior around a coherent responsibility and a focused reason to change.

Keeping contracts focused so clients depend only on capabilities they actually use.