Name: Node Congress 2025
Start: 2025-04-17T14:00:00.000Z
End: 2025-04-18T19:00:00.000Z

Join us on a fun journey through the world of Event-Driven Architectures! We’ll explore Node.js’s event-driven nature, the Event Loop, EventEmitter, Pub/Sub, and scaling with Kafka. Watch a live demo of an Emoji Reaction widget in action, and learn how events drive scalable, resilient systems. Don’t panic, it’s just events, and they’re easier than you think!

The Hitchiker's Guide to Event Driven Architectures

Julián Duque

The creator of Hono talks about Hono. Hono is a web framework using only Web Standard APIs and runs on Cloudflare Workers, Deno, and Bun. Now, in addition to those runtimes, it also runs on Node.js by using a Node.js adapter. However, there were some difficulties along the way. In this session, I will talk about how we adapted Hono to run on Node.js, improved its performance, and the possibility that we will support Connect-compatible middleware.

Make Hono work on Node.js

Yusuke Wada

Thinking Like an Architect

Luca Mezzalira

Modern test runners like Vitest and Jest wow us with next-level features. Think in-file concurrency, HMR, embedded Chromium, performance benchmarks - you name it. Yet behind all these goodies lies a labyrinth of runtime mechanics that tunnel deep into the JavaScript runtime. These sweet perks can quickly turn into a pitfall, from subtle mocking glitches to serious performance issues. Understanding these machines is not just a geeky tour into the heart of clever libraries - but also an insightful understanding of the V8 and code inference that will save you hours of head-scratching and help you craft more thoughtful tests. Don't like theoretical talks? Great, this one is for you.

Inside the Engine: How Modern JS Test Runners Work and the Traps They Hide

Yoni Goldberg

Yagiz Nizipli will talk about the development process of adding URLPattern to Node.js while making it performant and spec compliant. He’ll focus on specification and implementation differences and how the problems are tackled.

Adding URLPattern to Node.js

 Yagiz Nizipli

In this workshop we'll dive deep into integrating vector search into your applications. Over the course of this workshop, you'll not only grasp the core principles behind vector search but also cut through the buzzwords to understand its practical applications. We'll explore when vector search is the right tool for the job—and when it's not—so you can make informed decisions in your projects.By the end of the workshop, you'll have hands-on experience as we build a fully functioning application together, leveraging vector search to elevate the user experience. We'll also cover how to effectively test and optimize your implementation to ensure it meets real-world demands. Whether you're new to the concept or looking to refine your skills, this workshop will equip you with the knowledge and tools to integrate vector search confidently into your development workflow.Key takeaways:<ul><li>- Cut through the buzz and understand vector search's real-world applications to make informed choices in your projects.</li><li>- Gain hands-on experience building an application with vector search to enhance user experience practically.</li><li>- Learn best practices for testing and optimizing vector search implementations for robust, real-world performance.</li></ul>

Beyond Buzzwords: Practical Vector Search and RAG for Developers

Shivay Lamba

Discover how WASM at the edge pushes beyond cloud limits, enabling low-latency, secure, and distributed computing. In this talk, we’ll explore Wasm patterns for edge deployments, covering performance, security, and real-world use cases that blend cloud and edge seamlessly.

From Cloud to Edge Computing - Unleashing the Power of Webassembly at the Edge

Alex Casalboni

Security isn’t just about fixing bugs; it’s about understanding the assumptions we make (and avoiding unnecessary panic). In this talk, we’ll dive into the Node.js and Express threat models, which I co-authored, to break down what they trust, what they don’t, and why that actually matters for developers and security researchers.We’ll take a look at real-world vulnerabilities that fit within these models, clear up some of the most common security misconceptions (because not everything is a critical meltdown), and explore how these security assumptions influence bug bounties, exploitability, and long-term fixes. By the end, attendees will walk away with a much better sense of what’s a real security risk, what isn’t, and how to build applications that won’t keep them up at night.

What is a Vulnerability and What’s Not? Making Sense of Node.js and Express Threat Models

Ulises Gascón

Have you ever struggled to track performance issues in your Node.js apps? Me too—it can feel like chasing ghosts in your code! That’s why I’m excited to share how AI can make this so much easier. In this talk, I’ll show you how AI can simplify performance debugging by analyzing CPU and memory usage, finding bottlenecks, and even pointing out potential memory leaks. You don’t need to be an expert or spend hours digging through data—just some practical tips and tools to help you make your apps run smoothly and efficiently. Let’s make performance tuning less stressful!

Using AI as Your Performance Expert in Node.js

Lizz Parody

Most JavaScript frameworks are born out of the frontend ecosystem and slowly move toward the backend as meta frameworks. AdonisJS takes the opposite approach, emphasizing solving backend problems and staying agnostic about the frontend stack.In this talk, we will provide an overview of AdonisJS and how it could be your gateway to building full-stack monolithic applications using TypeScript.

Introducing AdonisJS - Your Gateway to Full-stack TypeScript Applications

Harminder Virk

Anna performs a deep dive into the anatomy of a regression that affected Node.js users in development and production in the past year, and analyzes how it gives us insight into how JS engines work under the hood and how Node.js itself is currently being developed.

What's in a Node.js Bug – A Case Study

Anna Henningsen

We often hear about standards, whether it be web or WinterTC or otherwise, but why are they liked and how do they actually help developers like you? This talk will explain by deep-diving into standards and WinterTC especially!

WinterTC and How Standards Help Developers

Oliver Medhurst

Imagine the convenience of executing TypeScript files directly with Node.js. Just a few years ago, this concept seemed like a distant dream. Today, it stands as an exciting experimental feature. This narrative dives into the journey of transforming this dream into a reality.

The Path to Native TypeScript

Marco Ippolito

This session explores the use of Traefik, Envoy, and HAProxy as alternatives to Nginx for managing micro-frontends in a monoturbo architecture. We'll dive into their configurations, benefits, and how they integrate with modern container orchestration systems, focusing on practical implementations and performance considerations.

Navigating Micro-frontends with Advanced Proxy Solutions: Traefik, Envoy, and HAProxy

Arya Soni

Ever faced a situation where you desperately needed a queue, but traditional options were off the table? My team ran into this exact problem. After a lot of experimentation, we discovered a unique solution using Redis and BullMQ. This talk will share our journey – from the frustration of limited queueing options to building a highly scalable, lightning-fast system. We'll show you how we overcame the obstacles and achieved incredible results with Redis and BullMQ.

Bull-Ish Your Queues With BullMQ

Luca Del Puppo

Despite the exaggerated claims about its decline, Node.js is thriving. Its continued evolution pushes the boundaries of what the modern web can do. We'll start by debunking myths about Node.js, showcasing its recent enhancements and robust performance in the tech landscape.The focus then shifts to Node.js's current role in server-side programming and cloud-native applications, emphasizing the vibrant community contributions that drive its progress. We'll also explore how integrating modern JavaScript features and the influence of emerging technologies are shaping Node.js's future, not signaling its end.Concluding, the talk projects a bright future for Node.js, identifying growth areas and dispelling any misconceptions about its relevance in the evolving world of technology.

The Alleged ‘End’ of Node.js Is Much Ado About Nothing

Paolo Insogna

Large Language Models (LLMs) are powerful, but they often lack real-time knowledge. Retrieval-Augmented Generation (RAG) bridges this gap by fetching relevant information from external sources before generating responses. In this workshop, we’ll explore how to build an efficient RAG pipeline in Node.js using RSS feeds as a data source. We’ll compare different vector databases (FAISS, pgvector, Elasticsearch), embedding methods, and testing strategies. We’ll also cover the crucial role of chunking—splitting and structuring data effectively for better retrieval performance.Prerequisites- Good understanding of JavaScript or TypeScript- Experience with Node.js and API development- Basic knowledge of databases and LLMs is helpful but not required Agenda📢 Introduction to RAG💻 Demo - Example Application (RAG with RSS Feeds)📕 Vector Databases (FAISS, pgvector, Elasticsearch) &amp; Embeddings🛠️ Chunking Strategies for Better Retrieval🔬 Testing &amp; Evaluating RAG Pipelines (Precision, Recall, Performance)🏊‍♀️ Performance &amp; Optimization Considerations🥟 Summary &amp; Q&amp;A

Building a RAG System in Node.js: Vector Databases, Embeddings & Chunking

Alex Korzhikov

Pavlik Kiselev

Many organisations have a lot of Java code. As they adopt newer technologies such as Node.js or Cloudflare Workers, maintaining interoperability with this existing code is important. WebAssembly is an instruction set for a stack-based virtual machine. This is the same type of abstract machine the Java Virtual Machine (JVM) uses making it possible to convert existing Java code to WebAssembly. This would allow Java code to be "imported" directly without rewrites, meaning it could be executed anywhere WebAssembly was supported. In this talk, I'll describe a research project that does just that. I’ll speak about the history of WebAssembly, what Java bytecode looks like, how to interpret it, decompilation techniques and implementing polymorphic objects.

Running Java in Node.js with WebAssembly

Brendan Coll

Large, legacy codebases often suffer from tangled dependencies, lack of modular boundaries, and monolithic "barrel" files that bundle together many modules. This makes the codebase difficult to understand, modify, and scale. In this talk, we'll explore strategies for "untangling the barrel" and simplifying a complex codebase to prepare it for migration to a monorepo architecture.We'll cover techniques for:- Analyzing your code for cyclic dependencies- Tools to help refactoring the code- Establishing coding guidelines and automation to control codebase complexity going forward

Lock, Stock and Barrel - Simplify your Codebase

Tally Barak

Unlock the potential of AI in Node.js applications through practical, real-world implementations. This session demonstrates how to integrate both open-source and closed AI models to build intelligent features like semantic search and autonomous agents. Attendees will learn production-ready patterns for RAG systems, vector embeddings, and AI agents while understanding the core architectural decisions behind each implementation. Perfect for developers ready to move beyond basic API calls to building sophisticated AI-enhanced applications.

NodeJS & AI: Building Smarter Applications

Aileen Villanueva

SQLite is having its Renaissance. It's being used in many projects and companies. Bun runtime has its implementation of sqlite, Turso is a product on top of SQLite, and the Ruby on Rails framework dropped all its dependency on Redis in favor o SQLite for things like Caching and Queues.Node.js version 22.5.0 introduced the `node:sqlite` module. It's an experimental module that allows you to use SQLite in a very Node.js way, without any external dependency.In this workshop, you will learn how to use SQLite in Node.js. We will explore the current `node:sqlite` features and how to use them. We will also explore the future of SQLite in Node.js.

SQLite in Node.js From Inside Out

Edy Silva

After many years and many projects using web technologies, Phil is becoming increasingly excited about changing up some of the tools that are his usual security blanket. After repeatedly campaigning for large clients to embrace tools from the NodeJS ecosystem while it was maturing, why would he consider disrupting that?In this talk, Phil will speedrun features and utilities of Deno that have him excited, and share information about plans to help the JavaScript and TypeScript ecosystems continue to thrive. We'll look at things like package management and publishing, testing and tooling, writing and hosting serverless functions, and more. All while exposing how and why Phil was once daunted by embracing TypeScript, but is now finding new comfort in the emerging tools on offer.

Dabbling With Deno — Tales From a Web Developer Playing With a New Toy

Phil Hawksworth

Authorization and authentication open standards have been protecting users, apps, and resources for over a decade. That’s plenty of time for attackers to learn to exploit anti-patterns or implementation weaknesses. Learn about modern best practice for OAuth security, and keep your users and data safe in our evolving tech landscape.

It’s Not Magic: Elevate Auth Security with PKCE Best Practices

Kim Maida

Want to master Fullstack: JS Backend, DevOps, Architecture? Join a two-day conference on all things Node.js, gathering Back-end and Full-stack engineers across the globe in the cloud is here to help you staying up-to-date on the latest Node.js tech.

Node Congress

I’m attending @NodeCongress, the biggest conf on #JavaScript backends – by clicking the badge you may get a free remote ticket & join me there with 5k other #nodejs devs & 15 great speakers #deno #cloudflare #awscloud

A two-day conference on all things Node.js, DevOps, Edge-native workers (Cloudflare & others), Serverless, Deno & other JavaScript backend runtimes, gathering Back-end and Full-stack engineers across the globe.

Node Congress 2025

FocusReactive

Hygraph

FusionAuth

Any Language. Any Platform. Any Technology.

FocusReactive will help you architect, build, and lead technically advanced websites focusing on performance and scalability. Partners and <a href="https://focusreactive.com/next-js-expert-agency/" target="_blank" rel="noopener noreferrer">experts in Next.js/Vercel</a>, Storyblok, Sanity, Contentful, Shopify Hydrogen, and other Headless eCommerce platforms.Whether you seek <a href="https://focusreactive.com/headless-cms-expert-agency/" target="_blank" rel="noopener noreferrer">expert Headless CMS agency</a> services or an expert agency with deep experience with platforms like Headless <a href="https://focusreactive.com/react-cms/" target="_blank" rel="noopener noreferrer">React CMS</a> &amp; <a href="https://focusreactive.com/nextjs-cms/" target="_blank" rel="noopener noreferrer">NextJS CMS</a>, FocusReactive is the one to help you scale.

As a special perk, we're offering a complimentary&nbsp;<a href="https://focusreactive.com/nextjs-performance-audit/" target="_blank" rel="noopener noreferrer">NextJS audit</a> designed to pinpoint areas for optimization, improve performance, and ensure you're following the best practices for SEO and security.&nbsp; Our expert team will closely examine your implementation, provide actionable insights, and help you leverage the full power of NextJS.

Free NextJS Performance and SEO Best Practices Audit

Next.js, Headless CMS and eCommerce expert agency

Node Congress 2025

Master Fullstack: JS Backends, DevOps, Architecture