The final interview was 5 hours long. It started with a 20-minute culture fit session. The rest of the time alternated between 45-minute algorithm question blocks and 15-minute general chat segments.

It was long and exhausting. I stopped being able to solve algorithms about 4 hours in; my brain started freezing. No one showed any real interest in anything I'd done. There was one 5-minute chat about 4 hours in regarding a side project I completed a year or so prior. No one explained what 5 hours of algorithm questions was meant to achieve.

If they had explained the format beforehand, I wouldn't have gone.

This was really surprising because the people seemed friendly. It seems like there must be something broken in the process to get good people to treat you like that.

They also never got in touch to tell me if I'd passed or not. I never chased them up; if that's how they treated me before I started, I can only imagine what it would be like working there.

A range of pretty standard algorithm questions, with one domain-specific algorithm question that took 15 minutes.