03 — API Gateway Patterns

02 — Strangler Fig

Incrementally replace a legacy system by routing new functionality to a new implementation while the old system continues to run. Named after the fig tree that grows around and eventually replaces its host.

Patterns

A book-shaped table of contents for reusable engineering patterns spanning object-oriented design, enterprise architecture, distributed systems, messaging, APIs, cloud infrastructure, observability, security, concurrency, AI/agentic systems, and organizational design — grounded in production experience at scale.

01 — REST Patterns

Resource modeling, pagination, filtering, HATEOAS, and versioning — the design decisions that separate a well-behaved REST API from an RPC call wearing HTTP verbs.

02 — RPC Patterns

gRPC and Protobuf, and the unary, streaming, and bidirectional-streaming call shapes — when RPC's tighter contract and lower overhead beat REST's looser one.

Patterns

A book-shaped table of contents for reusable engineering patterns spanning object-oriented design, enterprise architecture, distributed systems, messaging, APIs, cloud infrastructure, observability, security, concurrency, AI/agentic systems, and organizational design — grounded in production experience at scale.

02 — Pattern Selection & Trade-offs

How to choose between competing patterns under real forces: naming the context, weighing trade-offs and consequences, composing multiple patterns together, and recognizing when a pattern has outlived its fit.