[johnny_utah]

In my experience, I have had 3-6 hour long blocks with 1-3 members of the company, technical and non-technical. It typically starts with 5-10 minutes of chit-chat about my background and the company, then we do a technical exercise or a series of personality questions (for instance, explaining something technical to an employee in marketing to see if we could work together and if I could communicate across departments). After that, we wrap up with ~10 minutes of Q&A. Since it takes up so much time, it's important to get the phone screen right to not waste time on both sides. I have heard of companies that will have you pair program for a whole day instead of doing whiteboard questions.

[k-mcgrady]

I don't think I would do well in those sorts of interviews. I guess my experience is different because I've only interviewed remotely (remote interview, on site job). So they were typically 2-3 30 min Skype calls with different members of the company (CEO, CTO, Investor occasionally) and then I would send through code for them to look at or they would give me a small feature of their product to develop (1-2 days paid remote work) and review me based on that.

[mahyarm]

That kind of coding interview would be ideal too, but that takes more total time than 4-6 hours. It's 8-16 hours total vs 3-6 hours. When an engineer has a FT position already, they can't easily commit that much time as you can as a freelancer.