Lambda-Driven API Design: Building Composable Node.js Endpoints With Functional Primitives

“Lambda-driven API design” fits naturally with Node.js because a Lambda handler can be treated as a small, explicit function boundary: an event arrives, a response is returned, and everything else becomes an implementation detail that can be composed. The core challenge is not producing a response object, but scaling many endpoints without turning each handler into a copy-pasted blob of parsing, validation, authorization, logging, and error mapping. AWS has increasingly nudged Lambda Node.js workloads toward modern asynchronous patterns, including guidance that async/await handlers are recomme