Ask HN: How many tech companies are using JavaScript for their whole stack?

I’m currently building a mobile app and the entire stack is Javascript/Typescript. React-Native FE with a node backend. It’s nothing fancy just a simple API that sits in front of a Postgres DB. So far it’s going amazing. Since I’m constantly switching between BE and FE having them both in the same language saves my brain from a massive context switch.

I’m just wondering if it’s all too good to be true and I’ll eventually hit some bottleneck where the JS solutions doesn’t scale. Would love to hear what other people’s experiences are.

If you’re interested here’s a shameless plug of what I’m working on: https://hevyapp.com