Lengthy and very in depth, but transparent and enjoyable. I've never met so many people who ask such deep questions that really assess who you are as a person. Granted, I was interviewing for a services role, so that experience doesn't necessarily translate to other orgs (not saying it doesn't!).
On the whole, be prepared to explain any statement you make. "You say you want to be a manager in two years? Tell us more about that." Those questions aren't about trying to trick you, but to try to get a better understanding of who you are, how you think about things, and your ability to communicate. I've listed the interview difficulty as "very difficult" because I know that it's so much more in depth that other places' processes. That said, I don't think it was that difficult because the interviewers really made the interviews conversational. Fortunately I had answers for those follow up "why" questions. Definitely think about those before you interview, because if you don't, they will be extremely difficult.
I did a lot of interactive activities (think role plays, etc.) to demonstrate skill sets in addition to seven half hour interviews and a phone screening.
Interview questions [1]
Question 1
Scenario questions like, "what would you say if a customer said, 'X?'"
I applied through an employee referral. The process took 4 weeks. I interviewed at HubSpot (Dublin, Dublin) in Apr 2015
Interview
While it was certainly the most difficult interview process I have been through, the team, particularly the recruiter made it as pleasant as possible. I was referred by a friend and met some of the team at a recruitment mixer. The hiring process began with a 15-minute phone call with the recruiter, this was a general interview to talk about my current job, ambitions and knowledge about the company, she told me on the phone that she would like to put me through to the next stage. This was a 30-minute interview with the team lead on the phone. She asked more specific questions about inbound, Hubspot and my experience. The next round was a roleplay with the team lead and another team member over the phone. They played out scenarios with customers and threw in a few curveballs to see how I would think on my feet and problem solve. The next round was a face-to-face interview with four members of the team. This was held over three stages with each 30-minute segment having a different theme: job fit, extra job fit and culture fit. Unfortunately the culture fit section was changed at the last minute and was more of an inbound exam. I had prepared for lots of unusual questions but the interview was focussed on my account management and client relationship experience with lots of scenario based questions. I didn't get the job but they provided very clear feedback which was very much appreciated.
I applied through an employee referral. The process took 2 weeks. I interviewed at HubSpot (Cambridge, MA) in Apr 2015
Interview
I was very fortunate to get to work with Recruiter, David Fernandez. He was excellent at providing clear directions throughout the entire interview process. He was positive and outgoing, you know, the type of person you want to call your friend! Bravo HubSpot for hiring David! He represents your company well!
Interview questions [1]
Question 1
If I gave you $40,000 what type of business would you start?