Overall, Simple Habit seems like a great place to work with an extremely positive and supportive culture and brilliant engineers. I ultimately did not accept an offer, but I probably would've if the timing had been different and I hadn't found another job that fit my particular needs and interests more appropriately. The interview process was fairly rigorous, and definitely more thorough than most, but it was fun and not at all stressful or interrogative. There was a screening call, a fairly easy/time-scoped take-home, a very brief culture/intro call, and an onsite. The onsite consisted of a review of my solution for the take-home challenge, a white-boarding data-structures problem (a linked list challenge), an API design problem, a discussion about design, and a discussion about culture. I was given some helpful feedback, then invited back for a quick talk with the CEO and a Data Scientist. The whole interview felt collaborative and conversational and left me excited about the business. The toughest part was the whiteboarding problem, everything else was very straightforward-- but even the whiteboarding problem was well chosen and gave me a lot of support and room to show my knowledge, even though I needed help to reach the canonical answer.