ITTA offers a Node.js catalogue dedicated to server-side JavaScript development. The Node.js course covers platform fundamentals (event loop, modules, npm), REST API development with Express, asynchronous management (callbacks, promises, async/await), the npm ecosystem, database access (SQL and NoSQL), testing, and production best practices. It targets frontend developers shifting to full-stack, backend developers from other languages adding Node to their toolkit, and architects evaluating Node for their projects. Delivered in Geneva, Lausanne and interactive virtual classroom.
The npm registry today hosts more than two million published packages, making it the largest open source software ecosystem in the world. Behind this figure lies a daily reality of modern development: almost any non-trivial web application, whether frontend (React, Vue, Angular, Svelte), backend (Express, NestJS, Fastify) or tooling (webpack, Vite, ESLint, Prettier), depends on npm and therefore on Node.js. Understanding Node is not only learning a server-side language: it is learning the ecosystem JavaScript developers have lived in for fifteen years.
Node.js, created in 2009 by Ryan Dahl on top of Chrome’s V8 engine, brought a simple but transformative promise: use JavaScript server-side, with a non-blocking event-driven model particularly efficient on I/O workloads (APIs, WebSockets, streaming, microservices). Fifteen years later, Node runs in production at Netflix, LinkedIn, PayPal, Uber, Walmart and most major web platforms. The platform also remains a top choice for startups, mobile APIs, CLI tools and real-time servers.
Our Node.js training in the ITTA catalogue:
The course is designed as a full course sweeping the Node perimeter: event-driven architecture and event loop, CommonJS and ESM modules, npm package manager, REST API development with Express (with a mention of Fastify and NestJS as modern alternatives), async handling (callbacks, promises, async/await), SQL database access (with an ORM like Prisma or Sequelize) and NoSQL (MongoDB), error handling, server-side security (validation, JWT authentication, OWASP protection), automated testing (Jest, Mocha), and production deployment (env variables, logs, monitoring).
An honest Node course does not sell the platform as a universal solution. Node’s non-blocking event-driven model performs extremely well on I/O workloads (HTTP requests, database access, streaming, WebSockets) but less well on CPU-intensive workloads (heavy computation, image processing, machine learning), where performance-oriented platforms like Go, Rust or Java remain better suited. Our course addresses these cases and helps objectify Node’s choice against alternatives by project context.
Node is particularly relevant for: lightweight and fast REST and GraphQL APIs, real-time applications (chat, notifications, dashboards), microservices, CLI tools and developer tooling, intermediary servers (API gateway, proxies), full-stack JavaScript architectures where frontend/backend consistency enables code and type sharing (TypeScript). Our course addresses several concrete cases in exercises.
Our Node.js audience is diverse: frontend developers moving full-stack (JavaScript consistency between client and server), Java or PHP backend developers adding Node to stay employable, Python developers switching to Node for a client project, freelancers wanting to master a leading startup ecosystem, students transitioning to professional web development, and architects or tech leads evaluating Node and wanting to understand the platform before validating. Profiles without any prior JavaScript should start with a JavaScript fundamentals course before Node, but solid experience in another OO language (Java, Python, C#) lets you follow Node.js with some effort on syntax and async.
Node.js fits into a broader development catalogue. The web development sub-domain regroups frontend (HTML, CSS, JavaScript, frameworks) and backend (Node, PHP, Python web) training. The programming languages sub-domain covers languages broadly, including JavaScript and TypeScript.
On the editor side, Node.js is listed under Open Source, regrouping our training on open source technologies (Linux, Python, Node, Docker, Kubernetes, etc.). For full-stack JavaScript profiles, modern frontend framework training (React, Vue, Angular) is available. For developers extending into deployment, Docker and Kubernetes bring containerisation and orchestration skills useful for Node developers in production.
Several trends shape Node usage in 2026. TypeScript has become the de facto standard for serious Node projects, bringing static typing missing from JavaScript and fluidifying team collaboration. Express, long dominant, is challenged by Fastify (performance) and NestJS (TypeScript-oriented Angular-inspired architecture) for structured projects. The JavaScript runtime ecosystem has diversified: Bun and Deno offer alternatives with promises of performance (Bun) or native security (Deno). Node remains the most mature and most deployed runtime in production. On testing, Vitest gains ground against Jest. On ORM, Prisma rises as the modern choice over Sequelize and TypeORM.
Our Node.js sessions are scheduled throughout the year in Geneva and Lausanne, and in interactive virtual classroom with a live trainer. Group sizes stay small, allowing the trainer to tailor exercises to your real project or target. For development teams training several collaborators as a cohort, we offer in-house sessions calibrated to your stack (Express or NestJS, SQL or NoSQL database, specific cloud deployment). Freelance or career-shifting profiles can join open-enrolment sessions mixing internal and independent profiles.
Do I need to master JavaScript before Node?
Yes, ideally. Node is essentially JavaScript executed server-side, so a solid base on syntax, types, functions, promises and async is needed. For profiles starting from zero, we recommend a JavaScript fundamentals course before Node.js.
Express, Fastify, NestJS: which to choose?
Express remains the historical framework, simple and ultra-deployed, recommended to start and for simple projects. Fastify is faster with a modern API, recommended for high-performance APIs. NestJS brings a structured TypeScript-oriented architecture, recommended for team projects and complex architectures. Our course covers Express as a widely used tool and mentions alternatives.
Is Node.js relevant for microservices?
Yes, Node is one of the most frequent choices for microservices thanks to its lightness, startup speed and full-stack JavaScript consistency. Many organisations adopting microservices choose Node for I/O services and another language (Go, Java) for CPU-intensive ones.
What is the difference between Node.js, Deno and Bun?
Node.js is the original 2009 runtime, the most mature and deployed. Deno (by Node’s creator) offers a secure-by-default alternative with native TypeScript support. Bun is a recent performance-oriented runtime including bundler and test runner. In critical production, Node remains the 2026 reference, but Deno and Bun progress quickly.
Beyond features, our Node.js course emphasises the practices that make the difference between an API that holds the load and one that collapses on the first traffic peak. Async handling is a topic in itself: mastering callbacks, promises and async/await, avoiding callback pyramids and unhandled rejections. Error handling in event-driven mode requires specific patterns (try/catch around awaits, Express error middleware, error-first callbacks).
Server-side security is central: systematic input validation, output escaping, CSRF/XSS protection, properly configured JWT authentication, rate limiting on public APIs. Production requires other reflexes: environment variable management, structured logging (pino, winston), monitoring (Prometheus, Datadog, Sentry), clustering to use several CPU cores, and containerised deployment via Docker. All these topics are addressed in class with concrete examples and guided exercises on a realistic thread project.
Monday to Friday
8:30 AM to 6:00 PM
Tel. 058 307 73 00
ITTA
Route des jeunes 35
1227 Carouge, Suisse
Monday to Friday, from 8:30 am to 06:00 pm.
