Architecture Patterns

This one walks you through the major architectural patterns with practical decision criteria. It covers monoliths, microservices, event-driven systems, serverless, Clean Architecture, DDD, and hexagonal architecture with actual code examples showing event sourcing and port-adapter patterns. The decision tree is helpful: team under 10 people, stay monolithic; need audit trails, consider event sourcing; unpredictable load, look at serverless. It's honest about the pitfalls too, like prematurely jumping to microservices or building a distributed monolith. Good reference when you're past the prototyping stage and need to make architecture decisions that will stick around for a while.