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# Multithreaded Node.js


- **Date:** Friday, Jul 11, 2025
- **Time:** 09:30–11:30 (120 min)
- **Room:** M6 (40 Seats)
- **Event:** World Congress 2025

## Description

The statement 'Node.js is single-threaded' is a simplification that hides its true power for high-performance applications. While excelling at I/O, Node's event loop can be blocked by a single CPU-intensive task, leading to catastrophic performance degradation and systems that fail to scale. How can developers overcome this fundamental challenge to build truly responsive applications?
This hands-on workshop provides the answer. Forget passive lectures; prepare to roll up your sleeves and code through a series of progressive challenges. We will begin by experiencing the problem firsthand, building a server that buckles under a demanding workload. From that starting point, you will systematically refactor, benchmark, and progress toward sophisticated, production-ready, multithreaded solutions. You will leave with not just theory, but the hard-earned confidence to implement these powerful concurrency patterns in your projects.

Workshop requirements:
1. A working laptop with administrator credentials.
2. Having Node.js installed (preferibly with <https://github.com/nvm-sh/nvm> o similar). Versions 20.18.0+ or 22.5.0+ are the minimum we need.
3. A working code editor (VSCode, NeoVim, Intellij… etc).


## Speaker

### [Matteo Collina](https://www.wearedevelopers.com/@matteo-collina)

Platformatic Co-Founder and CTO, Node.js TSC member, Fastify Lead Maintainer


## Related talks at this congress

- [Node.js: More Threads Than You Think](https://www.wearedevelopers.com/events/world-congress-2025/sessions/644-node-js-more-threads) — Matteo Collina
- [Multithreading in Javascript: A guide to Web Workers](https://www.wearedevelopers.com/events/world-congress-2025/sessions/741-multithreading-in) — Dani Coll
- [End-to-End TypeScript: Completing the Modern Development Stack](https://www.wearedevelopers.com/events/world-congress-2025/sessions/759-end-to-end) — Marco Podien
- [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/events/world-congress-2025/sessions/782-streaming-ai) — Ahmed Megahd