TLDR: Don't waste time applying to this company if you care about work-life balance and want reasonable working hours
The interview process started with me having to make a test project (which was around two days of work). I was assured by the person I was in contact with that they were aware of their past issues (see Glassdoor reviews) and were working to make things better. I decided to give them the benefit of the doubt.
Then I had interviews with a technical person and a product person. The technical interview was mostly focused on specific JavaScript performance details, which was interesting but strange. Neither of those two interviews mentioned the test I spent hours working on.
As the interview process continued I discovered that this is a company where they expect people to work very long hours per week (I heard of an average of 60) and/or working on weekends frequently. I couldn't get any straight answer on exactly how much overtime and crunch there would be, but it was clear that it was a high amount, though they also said that the pay was high to compensate.
They were initially very interested in my profile after the first interviews, but as soon as I started expressing concerns about work-life balance and asking how many hours people actually do, the experience quickly became negative and I had no news from them for about two weeks until I got told that they changed their mind.