Intro call with CTO (very enthusiastic, open, and informational, and VERY rare to see), next step was an on-site (4 sessions: code kata, software design, and architecture, with lunch (provided) to get to know some of the team), then final interview with the CTO and CEO for a culture/values fit. An outstanding display of dedication to not only determining if the candidate was a good fit for the company, but if the company was a good fit for the candidate.
One of the most considerate, people-focused interviews I've had. There's a genuine concern for assessing the right things (personality, teamwork, creativity, communication) rather than just technical acumen.
A note on the difficulty of the interview - ALL of the people involved in the interview process (CEO, CTO, Employee Success Manager, and 3 very experienced Engineers) communicate very well, which made it easier for me to digest the technical and professional aspects.