[ensemblehq]

Most frameworks if architected properly on the backend are scalable.

You might want to check out the Quasar framework (Vue.js) as an alternative to React. It's a single framework that lets you build web applications and mobile applications with a single codebase. This is frontend only but will complement with Django REST API/Flask/FastAPI.

Personally, found it a lot faster and easier working with Vue.js/Quasar but documentation can also be tricky. Chat GPT has helped in this instance.