I applied online. The process took 4 weeks. I interviewed at HubSpot (Cambridge, MA) in Sep 2015
Interview
Phone screen with recruiter followed by another with a Manager. Invited onsite, given office tour and quick company overview. Interviewed with 8 people, ranging from Analysts to Directors and VP. They seem to prefer having two interviewers at a time. Generally a positive experience and they did expedite it once they knew I had multiple offers.
Interview questions [2]
Question 1
They will give you a business problem to solve ahead of time and you will have to present your solution and defend it. It's not difficult but technical knowledge is required