Architecture is not the pursuit of an abstract ideal system; it is the disciplined management of constraints, trade-offs, and operational realities. Every architectural decision involves giving up something desirable (latency, simplicity, consistency, cost) to gain something necessary (throughput, fault isolation, scale, team autonomy).
Premature distribution—splitting an early-stage system into dozens of microservices before understanding domain boundaries—is among the leading causes of engineering failure. This module teaches engineers how to make, document, and defend sound architectural decisions:
- Architecture Decision Records (ADRs): How to document high-stakes decisions with clear context, alternatives considered, and measurable trade-offs.
- Decomposition Economics: When to build a monolith, when to transition to a modular monolith, and when microservices are genuinely warranted.
- Reversibility & Risk Management: Distinguishing two-way doors (easy to undo) from one-way doors (expensive database migrations, cross-region replication strategies).