entwickler.de
Your first workflow in TypeScript (opens in a new tab)
How to build durable TypeScript workflows with the Workflow Development Kit in Next.js, including orchestration, retryable steps, delayed execution, and deterministic replay.
Hey, I'm Jonas Herrmannsdörfer
I'm a Developer Success Engineer at Vercel based in Germany. I work at the intersection of product, developer education, and real-world implementation with a strong focus on Next.js and React.
Before joining Vercel, I spent more than eight years building frontend and full-stack products across startups, enterprise teams, and consulting projects. I also run React.js and TypeScript trainings at workshops.de.
I regularly share what I learn through conference talks, workshops, and technical writing.
Latest Writing
View all →entwickler.de
Shipping Agents: A TypeScript Guide to Workflows, LLMs, and Next.js (opens in a new tab)
An introduction to durable, retry-safe AI and backend workflows with plain TypeScript, including deterministic execution, persistence, and suspension.
Vercel Knowledge Base
How to Internationalise Error Pages in Next.js App Router (opens in a new tab)
A practical guide for implementing localized error pages in the Next.js App Router with a maintainable routing strategy.
Latest Speaking
View all →🎤 Conference📍 London, United Kingdom
Mastering Next.js Cache Components
🎪 React Advanced 2026
🎤 Conference📍 Mannheim, Germany
React neu denken: Activities, automatische Optimierung und der Compiler
🎪 enterJS 2026
🎤 Conference📍 Bad Nauheim, Germany
One Roundtrip to rule them all: GraphQL-Architektur für eine neue User Experience
🎪 programmier.con Web & AI Edition 2025