Do NOT apply to Clean Power Research unless you're willing to commit to ~10 hours of total interview length (4 total rounds, 4-hr block for final round) as well as several additional hours to prepare a 30+ minute presentation to present in front of the company... only to proceed to get ghosted for a week and a half until they finally reject you but only after prompting them for an update. In the end, the only reason they offer you is because they "found a person with better qualifications for the role", which is completely understandable... if the concern was addressed WAY earlier in the interview process instead of burning up a dozen hours of the interviewer's time. Interview process went a little like this - Phone screen Video interview w/ Product Manager Video interview w/ 2 PM's Video interview w/ SWE Manager and Account Exec, presentation, and ending with a video interview with the CEO Pretty basic questions throughout. At times it seemed as if I was pitching my current company more than they were pitching Clean Power Research. Each individual conversation was engaging and fun at times, but I found it interesting that because many of the engineers and PM's previously worked at Microsoft, they talked more about Microsoft than CPR. Overall not a convincing process, but since the industry and company mission was interesting and ethical, I wanted to continue in the interview process.