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V3RON/README.md

Szymon Chmal

Expert Software Engineer at Callstack, building the React Native tools I wish I had.

I spend most of my time deep in developer tooling: debugging infrastructure, custom runtimes, testing systems, and the kind of React Native internals work that usually starts with reverse-engineering something undocumented. I build in the open, speak at conferences, and care a lot about making the developer experience feel sharper, faster, and a little less painful.

What I'm building

  • Rozenite - A React Native DevTools plugin framework that also brings the experience to the web and to agents.
  • Voltra - Build Live Activities and widgets for iOS and Android with server-side rendering, updates, and React Native-first ergonomics.
  • Harness - My go-to tool for testing native modules without mocks, but with the developer experience of writing tests in Jest.
  • React Native Grab - Select a UI element and copy its context to an agent, enabling surgical changes without wasting tokens on exploration.

Speaking

I speak regularly about React Native internals, DevTools, testing, rendering, and the weird engineering rabbit holes that somehow turn into useful tools.

I've given 50+ talks across conferences, meetups, and community events. More of that lives on chmal.it/talks.

GitHub Sponsors

If my work has saved you debugging time, helped your team ship faster, or made React Native feel more manageable, sponsoring me is a practical way to say thanks. It directly funds the evenings and weekends I spend pushing ideas further, polishing rough edges, and building more of the tooling I want this ecosystem to have.

Pinned Loading

  1. callstackincubator/rozenite callstackincubator/rozenite Public

    Plug-and-play panels for React Native DevTools. Install, enable, and start debugging in minutes.

    TypeScript 493 30

  2. callstackincubator/react-native-harness callstackincubator/react-native-harness Public

    Harness brings Jest-style tests to real native environments so you can test TurboModules like you would test your React Native app: with JavaScript.

    TypeScript 244 10

  3. callstackincubator/voltra callstackincubator/voltra Public

    Voltra lets React Native developers build native iOS Live Activities, Dynamic Island layouts, and widgets as React components without writing Swift. It supports hot reload, push updates, and includ…

    TypeScript 614 20

  4. callstackincubator/react-native-grab callstackincubator/react-native-grab Public

    Touch-to-grab context tool for React Native UI changes

    TypeScript 176 5

  5. metro-config-transformers metro-config-transformers Public

    Create Metro config transformers that work in all possible combinations

    Astro 3

  6. react-native-webworker react-native-webworker Public

    WebWorker for React Native

    C++ 4