(Not related to the company) Isn't it pretty normal to never hear back unless they want to schedule an interview?

Especially after the last two years with hundreds of thousands of laid off devs, companies are probably flooded with applications.

It's nice when they have a form letter, even nicer when a real person takes the time to reject you, but I wouldn't expect either as a matter of course.

We receive a lot of applications. But most people don’t qualify because we are looking for a specific skill set. Very few people make it to the initial phone screen and then a subset of them end up in the following rounds. I just looked at our typeform and found that we received 54 (72 the month before)submissions during the week when we posted on HN. (As they don’t specify how they found out about us in the Typeform, I am making an assumption here that 100% of the people who applied during that week was from HN).