I work on the Experimentation Platform team at Netflix. Our main tool, ABlaze, is a web app that's very backend driven. I'm working on improving the forms aspect of it with Formlessness.

It's a bit different than something like the Forms in Django. It defines the content of the form, but leaves the converting to html to the frontend. It also receives data as JSON, like an API, vs working with form data. And it has a way over-the-top validation system.

It needs more docs (of course), but I do have some good first issues that are mostly just adding another instance of a feature that already have a bunch of examples. This isn't the right project for a complete beginner. But, if you can contribute a bit, I can help get your contributions in and give you feedback quickly.