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Events

Where we share what we learn

Stay connected with our team through events, talks, and workshops. Check out what’s coming next or browse recordings from past sessions.

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Meetup
Berlin, Germany
Online
React Universe Meetup x Zalando, Berlin

React Universe Meetup lands in Berlin on January 29, 2026. Join Zalando and Callstack for an onsite React Native-focused evening.

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Past events

Explore talks and live streamed events from the past, packed with engineering insights from Callstackers who shape modern cross-platform app development.

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Insight Page
Testing
Talk
12/9/2025

Write Once, Test Everywhere: Cross-Platform Testing for React Native

Join Szymon Chmal at WarsawJS #133 to explore cross-platform testing in React Native with a new approach powered by React Native Harness.
Szymon Chmal
Insight Page
AI
Talk
12/5/2025

The Offline AI: On-Device LLMs in React Native With AI SDK

Learn how to run on-device LLMs in React Native using Vercel’s AI SDK from Michał Pierzchała's talk at DevAI by Data Science Summit.
Michał Pierzchala
Insight Page
AI
Talk
11/28/2025

How to Run Any LLM On-Device With React Native

In this talk, Szymon will show how to run LLMs directly inside React Native apps using an AI SDK that provides a powerful abstraction layer to simplify building AI applications. Join him as he explores react-native-ai, a library that enables local LLM execution.
Szymon Rybczak
Insight Page
Developer Experience
Talk
11/28/2025

How I Hacked React Native DevTools (And Built a Plugin Framework)

Learn how React Native DevTools work under the hood, and how to inject custom plugins with clean hooks and no forks.
Szymon Chmal
Insight Page
Brownfield
Talk
11/17/2025

Vega Developer Meetup

Learn how to integrate React Native into Android TV apps at the Vega Developer Meetup. Workshop, roadmap, and community talks, live in Munich.
Michał Pierzchala
Eric Fahsl
Artur Morys-Magiera
Insight Page
Testing
Talk
11/14/2025

Testing Native Modules Reliably With JavaScript

Learn how React Native Harness bridges the gap between mocking and E2E testing: real device tests, full native access, Jest-style simplicity.
Michał Pierzchala
Insight Page
Cross-Platform
Talk
11/12/2025

My First Few Months With Lynx.js

Is Lynx.js the next big thing in UI? Łukasz shares a newcomer's journey with the framework from TikTok's creators, revealing the good, the bad, and crucial lessons he learned.
Łukasz Chludziński
Insight Page
Brownfield
Talk
10/8/2025

React Everywhere: Bringing React Into Native Apps

Most teams use React on the web but still rely on native code or WebViews in their mobile apps. This talk explores how React Native can replace WebViews with minimal effort, allowing React to power both web and mobile.
Mike Grabowski
Insight Page
React Native
Conference
10/7/2025

React Conf 2025

We’re thrilled to announce that Callstack is once again co-hosting React Conf 2025 with Meta!
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Insights

Your next read or watch starts here

Stay up to date with our latest insights on React, React Native, and cross-platform development from the people who build the technology and scale with it daily.

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Article
12/22/2025

React Native Wrapped 2025: A Month-by-Month Recap of The Year

Seven major React Native releases in 2025, React Native turns 10, the New Architecture becomes the default, and 1.0 moves into view. A recap of 2025’s biggest RN updates.
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Article
12/19/2025

Visualizing the Dual-Thread Model of Lynx JS

A practical look at Lynx JS’s dual-thread runtime, using real examples to show how main and background threads behave under load.
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Article
12/18/2025

Why You Don’t Have to Minify JavaScript Code in React Native Apps

React Native skips JavaScript minification in production because Hermes handles dead code elimination at the bytecode level. Here’s how and why it works.
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Article
12/16/2025

Profiling MLC-LLM’s OpenCL Backend on Android: Performance Insights

Step-by-step: add EventTraceRecorder traces to MLC-LLM, use TVMSynchronize to bracket GPU work, and capture OpenCL kernel timings in TVM.
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Article
12/12/2025

How to Cleanly Swap Between React Native Storybook 10 and Your App

Set up React Native Storybook 10 with Expo or the Community CLI. Learn configuration steps, updated tools and a simple workflow for toggling Storybook.
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Article
12/8/2025

Mobile vs. VR: Key Differences in Features, UI, and UX

Explore how VR reshapes layout behavior, typography, spacing, accessibility expectations, and interaction patterns in React Native.
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Live Stream
Live Stream
12/18/2025

Building iOS Live Activities with React

Learn how to build iOS Live Activities and Dynamic Island experiences using pure JSX, no Swift or native code required.
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Live Stream
Live Stream
12/11/2025

React Native 0.83: A Stability-Focused Release With Surprisingly Big Quality-of-Life Wins

Join Łukasz Kewin for a walkthrough of React Native 0.83, recent ecosystem news, and hands-on demos.
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Talk
Talk
12/5/2025

The Offline AI: On-Device LLMs in React Native With AI SDK

Learn how to run on-device LLMs in React Native using Vercel’s AI SDK from Michał Pierzchała's talk at DevAI by Data Science Summit.
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Podcast
12/17/2025

A (Secure) Christmas Carol: The Story of Npmezer Scrooge

A holiday story about npm audits, unpinned dependencies, and the real cost of ignoring JavaScript security warnings.
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Podcast
12/10/2025

Beyond Static vs. Dynamic: Next.js's New Unified Model

Aurora Scharff (Crayon Consulting) explains how Next.js is moving to a unified model that ends the static/dynamic split and helps developers manage Suspense boundaries.
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Podcast
12/9/2025

From Hobby Tool to Default: Expo's Journey and the New App Awards

Jon Samp (Expo) discusses the framework's evolution since becoming the React Native default, the death of the "eject" mentality, and the launch of the Expo App Awards.