In this episode, Puneet Lath, Director of Research and Development at Expensify, talks about the unique way Expensify is using open source with their products by not just open-sourcing software tools but also open-sourcing the front end of the product itself. They are rebuilding their products on React Native to be fully cross-platform and doing so in an open-source manner. All code is public, and anyone can see it and contribute to it.