Every senior Go engineer uses the Strategy pattern daily — often without knowing it. io.Writer. http.Handler. sort.Interface. All of these are Strategy patterns baked into Go's standard library.
In this video, we break down the Strategy design pattern from first principles: why it exists, how it eliminates brittle if-else chains, and how to implement it idiomatically in Go using interfaces and embedding.
You'll see:
✅ The real problem Strategy solves (the "algorithm coupling" trap)
✅ Step-by-step implementation with PrintStrategy, ConsoleSquare, and ImageSquare
✅ How Go's embedding (not inheritance) enables clean composition
✅ Runtime strategy switching — changing behavior without redeployment
✅ When Strategy is overkill and when a func type is better
✅ Production examples: Auth middleware, database drivers, payment processors
This is part of our complete Go Design Patterns series — built for backend engineers who want to write systems that scale, stay maintainable, and survive production.
