TL;DR; I had a really great interview experience at Flatiron. I feel like they give a lot of thought and care to their process, and it shows.

I applied online as a new grad and received a small, timed coding assignment (I think around two questions in one or 1.5 hours). After completing the code screen, I heard from a recruiter, who set up a time for a phone call with an engineer on their team. I went through a technical question with that engineer and also discussed some projects I'd worked on. After that, I heard from the same recruiter about setting up a time to come and interview on-site.

For the on-site interview, I met with four different interviewers, with a break for lunch in the middle where I talked with a member of the Flatiron team. The questions in the interview involved coding on the whiteboard, talking about how I would design a problem, and also my previous experiences/projects. I thought the questions were very reasonable and related to seeing how I thought as an engineer, not if I had certain things memorized.

After the four interviews, two members of the team took me out for coffee to share more about working at Flatiron and answer any questions I had.

After the on-site interview, I received an offer. The recruiter shared more about what the offer entailed and also set up time for me to do what they call a "reverse interview," where I met with a couple of different members of the team so they could answer any questions I had.

Overall, everyone I met throughout the process was kind and respectful, and seemed concerned about making sure Flatiron was a good fit both for me and them.