Incredibly fast analytics queries aren't possible in most run of the mill relational database, we use SingleStore as an analytics engine to push the limits of what data we can serve up to customers.
To make our application shine, we rely on web primitives offered by the open source Tanstack tools. They make our app easier to use for customers, and easier to build for our engineers.
Railway provides, fast, easy-to-setup hosting for our API and infrastructure. It lets us us push daily updates to our systems without worrying about the details.