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Szymon Chmal

Szymon Chmal

Szymon is a passionate React developer and member of the Callstack Incubator, currently focused on building next-generation tooling for React Native developers. With extensive experience spanning React, Next.js, Astro, Angular, and Node.js, Szymon is dedicated to exploring cutting-edge technologies and improving developer workflows. A seasoned public speaker, Szymon has delivered over 24 talks on web performance and accessibility, making complex topics accessible and engaging. As the founder of Google Developer Groups Toruń, Szymon is committed to knowledge sharing, mentoring, and advancing the web community. Recognized as a Microsoft MVP in web development, Szymon combines deep technical expertise with a passion for community building and innovation.
Callstack, Polandcallstack.com/team/szymon-chmalChmalSzymonV3RONszymon-chmalchmal.it
How I Hacked React Native DevTools (And Built a Plugin Framework)
React Advanced 2025React Advanced 2025
Upcoming
How I Hacked React Native DevTools (And Built a Plugin Framework)
Ever wondered how React Native DevTools work under the hood? I went down the rabbit hole, reverse-engineered the whole thing, and figured out how to inject custom code - no forks, just a bit of hackery. In this talk, I’ll walk you through the journey: how the DevTools architecture works, how I hooked into it cleanly, and how that led to building a framework for writing your own plugins, complete with React-based UIs and sandboxed execution. Let’s make DevTools truly extensible.
devtools
Astro – Island Technology in the Name of Optimization
React Advanced 2024React Advanced 2024
20 min
Astro – Island Technology in the Name of Optimization
Next.js is the default choice for most teams, although there are many other solutions on the market. One of such solutions is Astro, which in certain areas, due to its eccentric approach, seems to outclass the Vercel king. During this lecture, I will present the key features of Astro, as well as the differences between it and the aforementioned Next.js. You will learn what interactive islands are, why MPA (multi-page application) is still a very good choice for content-driven websites, and much more. Who knows - maybe you will use Astro in your next project?
fullstackframeworksastro