Add Callstack reference (#2789)

README.md

@@ -52,6 +52,8 @@ Use official component kits provided by [Material Design](https://material.io/re
 
 `react-native-paper` is an open source project and will always remain free to use. If you think it's cool, please star it 🌟. [Callstack][callstack-readme-with-love] is a group of React and React Native geeks, contact us at [[email protected]](mailto:[email protected]) if you need any help with these or just want to say hi!
 
+Like the project? ⚛️ [Join the team](https://callstack.com/careers/?utm_campaign=Senior_RN&utm_source=github&utm_medium=readme) who does amazing stuff for clients and drives React Native Open Source! 🔥
+
 <!-- badges -->
 
 [build-badge]: https://img.shields.io/circleci/project/github/callstack/react-native-paper/main.svg?style=flat-square