Callstack Engineers (@callstackio) / X

Callstack Engineers

4,370 posts

Callstack Engineers

@callstackio

We ship cross-platform products at AI speed. Training LLMs (Apex). React Native Core Contributors & React Foundation Members. Bringing you @AgentConf.

Wroclaw, Poland

Joined August 2016

Pinned
Callstack Engineers
@callstackio
May 26
When the way software is built changes, we help companies adopt it. For over a decade, that meant bringing React Native to production across mobile, web, desktop, and TV. Now we are expanding that same mission to AI-native engineering: helping teams ship software with agents,
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22K
Callstack Engineers
@callstackio
17h
Years go by, but React Native apps are still often slow for the same reason: unnecessary React re-renders. That is why Part 1 of our guide starts there. We cover React Compiler, uncontrolled components, atomic state management, and animation patterns that protect FPS. If your
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Callstack Engineers
@callstackio
17h
Get it here:
Improve Your React Native App Performance With a Few Tricks | Callstack
From callstack.com
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Callstack Engineers
@callstackio
21h
Your agent is only as useful as its feedback loop. Mike Grabowski’s (@grabbou) @ReactSummit 2026 talk shows the fix: Agent Device gives AI coding agents a way to inspect UI, interact with the app, collect evidence, and verify changes across mobile, TV, and desktop. Watch now 👇
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Callstack Engineers
@callstackio
21h
Check agent-device on GitHub
GitHub - callstack/agent-device: CLI to control iOS and Android devices for AI agents
From github.com
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Callstack Engineers reposted
Callstack Engineers
@callstackio
Jun 26
Agents reason about code well, but they lack proper tooling to see results of code changes running live on a device. Integrating agent-device into the development loop gives the agent hands and eyes on devices and simulators, so they can reproduce bugs, record the proof,
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Callstack Engineers reposted
Michał Pierzchała
@thymikee
Jun 29
React Native Better Maps uses agent-device to improve performance 🔥
Piotr Graczyk
@piotrgraczykk
Jun 29
react-native-better-maps v1.0.0 is live 🚀 A faster, modern alternative to react-native-maps, built with Nitro Modules. Shoutout to @agent_device it helped a lot during perf iteration. Built with @jkasprzyk17 📦 npm install react-native-better-maps ⭐ github.com/gmi-software/r…
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Callstack Engineers
@callstackio
Jun 29
One of the best React Navigation 8 alpha changes is screen-aware typed hooks. Pass a screen name and `useRoute` / `useNavigation` get far more specific. Type-safe params and navigation, less boilerplate. Read the article 👇 Link below
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Callstack Engineers
@callstackio
Jun 29
Read the article 👇
Less Boilerplate, More Type Safety: React Navigation 8's Typed Hooks
From callstack.com
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Callstack Engineers reposted
Agent Conf | Sept 17-18, 2026 | Warsaw
@AgentConf
Jun 29
Agent Conf's venue is set. We’re hosting it at Crowne Plaza Warsaw - The HUB, at the heart of Warsaw's central business district. Prepare for 2 days of talks, workshops, and conversations about building software with agents. We partnered with two nearby hotels to give Agent
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Callstack Engineers
@callstackio
Jun 29
Voice agents are more than speech in, speech out. @lukebfarrell has recently talked to @kraenhansen about perceived latency, turn-taking, interruption handling, and the tradeoff between speed and expressiveness. Watch their conversation ⬇️
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Callstack Engineers reposted
Mike
@grabbou
Jun 25
Upgrade your skills! 🚨
Michał Pierzchała
@thymikee
Jun 25
PSA: React Native Best Practices skill just got a big upgrade: → agent-first profiling via @agent_device and @callstack/inspector → version-aware RN, @expo, FlashList, Legend List → fewer misleading guidance and brittle benchmarks → smaller footprint » npx skills update
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Callstack Engineers reposted
Satya
@satya164
Jun 25
We also added a skill for building UIs with @reactnavigation 🎉 Check it out 👇
Michał Pierzchała
@thymikee
Jun 25
PSA: React Native Best Practices skill just got a big upgrade: → agent-first profiling via @agent_device and @callstack/inspector → version-aware RN, @expo, FlashList, Legend List → fewer misleading guidance and brittle benchmarks → smaller footprint » npx skills update
3.2K
Callstack Engineers reposted
Michał Pierzchała
@thymikee
Jun 26
Expensify is automating their app performance work with AI loops using @agent_device - you can do it too
Callstack Engineers
@callstackio
Jun 26
Agents reason about code well, but they lack proper tooling to see results of code changes running live on a device. Integrating agent-device into the development loop gives the agent hands and eyes on devices and simulators, so they can reproduce bugs, record the proof,
00:00
2.4K
Callstack Engineers
@callstackio
Jun 26
Agents reason about code well, but they lack proper tooling to see results of code changes running live on a device. Integrating agent-device into the development loop gives the agent hands and eyes on devices and simulators, so they can reproduce bugs, record the proof,
00:00
12K
Callstack Engineers
@callstackio
Jun 26
Learn more from the article 👇
How Expensify Uses Agent-Device for Mobile Bug Evidence and Profiling
From callstack.com
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Callstack Engineers
@callstackio
Jun 26
Zattoo’s React Native migration was not mainly about sharing code. It was about fixing the operating model around a multi-platform streaming product: release paths, team ownership, consistency, and platform expansion. Learn more from the webinar 👇 Link below
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Callstack Engineers
@callstackio
Jun 26
Watch the full webinar 👇
From Native to React Native for TV: The Zattoo Case | Callstack
From callstack.com
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