December 4 - 7, 2026
React Day Berlin
Berlin & Online

React Day Berlin 2026

Build apps, not walls

Full remote ticket included with Multipass.
Take part in the exploration of the React universe! Focusing on in-depth talks, hands-on workshops, and developing new opportunities, the React Day Berlin conference provides space for everyone to make friends and collaborate on stellar apps.
Upcoming workshops
Ship a Next.js App with Claude Code
Nov 19, 15:00
Ship a Next.js App with Claude Code
Workshop
Maurice de Beijer
Maurice de Beijer
Join us for a hands-on workshop built for developers who want to move from idea to working software faster, using Claude Code, Anthropic's agentic coding tool. Unlike a typical autocomplete-style assistant, Claude Code lives in your terminal, IDE, or desktop app, reads and understands your entire codebase, and can take direct action: editing files, running commands, and handling git workflows, all through natural language.
In this workshop, you'll initialize a Next.js project from scratch and use Claude Code to plan, build, and iterate on a real, working application. You'll set up a `CLAUDE.md` file to give Claude persistent project context and conventions, so you're not repeating yourself in every prompt, and use Plan Mode to review an agent's approach before it touches any code, keeping you in control of multi-step changes. Along the way, you'll write effective prompts, delegate multi-step coding tasks, and let Claude Code handle the repetitive work of scaffolding, wiring up components, and debugging, so you can focus on product decisions and architecture instead of boilerplate.
By the end of the session, you'll have shipped a functioning Next.js application and gained a practical workflow for using Claude Code on your own projects, whether you're prototyping quickly or working within an existing codebase.
No prior experience with Claude Code is required. Some familiarity with React or Next.js is helpful but not essential; we'll cover what you need to know as we go.
Register
Build a Production Agent Harness
Nov 23, 15:00
Build a Production Agent Harness
WorkshopPro
Tejas Kumar
Tejas Kumar
Most agents fail in production for reasons the model can't fix. In this workshop, we start from an agent that fails and lies about it, then harness it step by step until it does the job reliably, without a single change to the prompt. Workshop outline:

1. The failing agent: why it breaks, and why it claims success anyway
2. The agent loop, built up from an empty loop
3. A tool registry and context management
4. Guardrails, context compression and retries that hold whichever model sits underneath
5. Deterministic verification, so the agent fails honestly instead of claiming success
6. Moving secrets and fragile steps, like login, out of the model and into the harness
7. A harness plan for the agents you're building
Register
Building Production-Ready React Applications with Cursor AI
Dec 10, 15:00
Building Production-Ready React Applications with Cursor AI
Workshop
Kristiyan Velkov
Kristiyan Velkov
Mentorship available
AI can generate a React feature in minutes, but getting it to production quality is a different story. In this advanced, hands-on workshop we go beyond simple prompting and build a real React application with Cursor AI, the way professional teams do it.

You will learn how to:
- Set up Cursor for a real codebase with project rules, context and reusable prompts
- Plan and build features with Cursor's Agent while keeping full control over architecture and code quality
- Generate and maintain tests, types and documentation with AI
- Review AI-generated code for security issues, performance problems and hidden bugs
- Refactor and scale an existing React codebase safely with AI assistance
- Prepare the application for production with CI checks, linting and deployment best practices

By the end of the workshop you will have a practical workflow for using AI to ship React features faster without sacrificing quality, security or maintainability.

Level: intermediate to advanced. Basic React and TypeScript knowledge is recommended.
Register
Past workshops
Claude Code: Black Belt
Recording pending
Claude Code: Black Belt
Workshop
Pawel Sawicki
Pawel Sawicki
Stop prompting. Start orchestrating. In four intense hours you'll go from using Claude Code like a faster autocomplete to commanding it like a senior engineer commands a team: engineering its context, deploying fleets of subagents, locking it down with hooks, and turning it loose on work that runs without you.Every Claude Code user hits a ceiling where the easy wins run out. The agent handles small stuff beautifully, then loses the thread on anything real. The difference between that ceiling and real mastery isn't better prompts. It's control. This workshop is about control.You'll spend the whole four hours inside CLASH, a real full-stack application, handed to you fully built so nothing stands between you and the hard parts. A serious codebase is the point: it's the only place agentic engineering shows you whether it actually holds up.The throughline is context. Treated carelessly, the context window fills with noise until the agent drifts. Treated as a resource you engineer, it becomes the biggest lever you have. From there the toolkit opens up. Repeatable work becomes a reusable Skill. Noisy, exploratory work goes to subagents that run in their own isolated context, several at once when the job allows. Hard rules become hooks the agent cannot cross. Your own systems come into reach through MCP.Then you let go of the wheel, carefully. The same agent that pairs with you can run headless in a pipeline, drive a long task to a defined finish on its own, or live inside your software through the Agent SDK. We close by setting two greenfield methodologies, Spec Kit and BMAD, side by side, so you leave knowing not just how to drive the agent but which approach fits which problem.Two ideas hold it together: context is king, and you push it, you own it. This was never about generating code faster. It's about staying in command while the agent does more.This is an advanced session for engineers, tech leads, and architects who already use Claude Code every day and want to reach the top of the curve. We move fast, and we start in the deep end.
Modern React Architecture
Recording pending
Modern React Architecture
WorkshopPro
Brad Westfall
Brad Westfall
In this workshop we'll dive into the latest advancements in React and best practices for building modern React apps. We'll take a look at modern NextJS and React Router 7 Framework along with React's "React Server Components". We'll also talk about improving the data-fetching strategies of your SPAs along with options for migrating your SPA to modern React Router.