A complete Node.js backend guide for 2024 using TypeScript. Covers the event loop, async patterns, streams, worker threads, error handling, and production best practices for building high-performance APIs.
One synchronous, blocking operation in your Node.js server blocks EVERY concurrent request. JSON.parse on a 10MB payload, a for-loop over 100k items, or a synchronous file read — all of them freeze your event loop and make your entire server unresponsive.
Learn how to integrate LLM calls into microservice architectures with async patterns, job queues, and service contracts that don't introduce latency bottlenecks.
Ownership model for JavaScript developers, Axum HTTP server, async/await with Tokio, error handling, sqlx type-safe SQL, when Rust beats Node.js, and calling Rust from Node.js.
You wrote perfectly async Node.js code — no blocking I/O, no synchronous loops. Yet under load, responses stall and CPU pegs. The culprit is Node.js''s hidden libuv thread pool being exhausted by crypto, file system, and DNS operations. Here''s what''s really happening.
Build reliable webhook systems with HMAC-SHA256 signatures, idempotency keys, exponential backoff, dead-letter queues, and production testing patterns.