From Design to Shipped: A Modern App Development Meetup

Name: From Design to Shipped: A Modern App Development Meetup
Start: 2026-10-22T00:00:00.000Z
Location: Amsterdam

Video coming soon

Organizer

Callstack x JetBrains x Expo

Speakers

Michał Pierzchala

Principal Engineer

Callstack

Craig Walker

Product Manager

JetBrains

Kasper Peulen

Software Engineer

Chromatic

Cedric Van Putten

Software Engineer

Expo

On October 22, we’re teaming up with JetBrains and Expo for an in-person meetup in Amsterdam about building web and mobile apps with AI agents.

The evening will focus on the work around generating UI code: handing off designs, reviewing output, verifying implementations, and deciding what ships. Across three talks, we’ll look at verification loops for mobile development and how tools such as Storybook and WebStorm are adapting to workflows with agents.

If you already use agents in your development process or are starting to explore them, join us for the talks and stay for conversations over pizza and drinks.

Agenda

5:45 PM: Doors open
‍
6:10 PM: Intro and welcome
‍
6:20 PM: From Design to Done in One Shot With a Cheap Model, by Michał Pierzchała
‍
6:45 PM: Build, verify, ship apps by anything, by Cedric van Putten
‍
7:10 PM: Agents Didn't Kill the UI Developer Workflow - They Changed It, by Craig Walker and Kasper Peulen
‍
7:35 PM: Networking, pizza, and drinks

Talks and speakers

From design to done in one shot with a cheap model

Michał Pierzchała will walk through turning mobile designs into working features with a lower-cost model. He’ll explain the verification loops behind the increase in first-pass pull request merges from 60% to 98% described in his talk.

Michał Pierzchała, Principal Engineer at Callstack

Build, verify, ship apps by anything

Today, everyone can be a builder. To build quality apps, you need to iterate: implement, test, review, and refine. As apps grow, the workflows behind them need to scale too. Through a live demo, Cedric van Putten will show how Expo and EAS help you scale agentic workflows and ship confidently to production. Watch agents verify changes in parallel on cloud simulators and return evidence for human review. Learn how to keep iteration fast as your app grows.

Cedric van Putten, Software Consultant (Expo)

Agents didn't kill the UI developer workflow - they changed it

AI agents are changing how developers move between design, code, and verification. Craig Walker and Kasper Peulen will discuss the work of defining intent, steering agent output, and deciding what’s ready to ship.

The talk looks at Storybook’s new agent-native CLI and WebStorm’s design-to-browser agent workflows, and how each approaches that change.

Craig Walker, Product Manager at JetBrains (WebStorm), and Kasper Peulen, Software Engineer at Chromatic (Storybook)

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