We work in Open Source with industry leaders
We are core contributors to React Native and official Meta partners. Everyday, our open-source libraries make millions of developers more productive.
To drive and accelerate software development innovation
Delivering at scale, shaping the ecosystem, growing the community
2016
200+
50+
We’ve been part of the React Native from the start
Callstack was founded just months after React Native was open-sourced. Since then, we’ve been building, contributing, and evolving alongside the ecosystem—mastering every layer of React and React Native.
2015
React Native is open-sourced by Meta, sparking a new era in mobile development.
2016
Callstack is founded in Wrocław, Poland, just months after React Native goes public.
2018
We launch React Native EU, the first dedicated React Native conference in the world.
2024
Callstack grows beyond 200 team members, expanding to multiple countries.
Looking ahead
React Native is just getting started, and so are we!
We make React Native
work at scale
We help enterprise clients adopt React Native in large-scale applications, ensuring optimal performance in complex environments.
Join the team building the React Universe
We’re a team of trusted React and React Native contributors who care deeply about great code, Open Source, and solving real-world problems together.
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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.
