php , node.js or Django?

Node. Fast, simple and has the biggest ecosystem by far. For a generic web project:

• ORM: mongoose
• Backend/Microservices/Microplatform; moleculer and moleculer-web
• Frontend: React and Semantic UI

I've scaled that stack to 1500 API requests per second with 3 nodes and Kubernetes. The only thing I could think of that might be even more scalable is go-micro, but there you'll need way more boilerplate.

Depends on several factors, like what languages you have experience with and what you want to create.