I thoroughly enjoyed the HubSpot interview process. It comprised of three stages. Firstly, an initial call with the recruiter. I'm not sure if I'd even call this a stage as they are just giving you information at this point. Next, there is the 3 hour API challenge you will hear of if you read other interview reviews. This was really interesting and enjoyable. If you are decent at programming, you will have it nailed in about an hour. Finally, there is a four-stage interview on-site. One with the director of engineering - this was non-technical and was more to see if your personality fits the HubSpot type. Secondly, I had one centred around database design. I honestly hadn't prepared at all for the types of questions which I received, and was completely thrown off by this stage. Next was system design. With good preparation this will be a breeze. Finally, a coding interview. Nothing too difficult, although I admittedly froze on the spot, I honestly don't know why. Study on leetcode or hackerrank, and you won't be surprised. Overall a positive experience. I didn't get the job largely due to my performance in the DB interview, but hey. I enjoyed it all the while.