I'm Rob and I want to share what I've built - a solid ledger behind simple API: https://decimals.app
The ledger is a key piece of any financial system and is easy to get the design wrong, resulting in troubles for making sure money movements are adding up.
I took a lot of inspiration from good designs from Square, Uber, and others for the scalability and security aspects. And on the usability side, I applied many concepts from the Ledger CLI, making it very easy to use.
I'm really happy I get to show this to you all, thank you for reading about it! Please let me know your thoughts and questions in the comments.