Applied online. Got a request for a phone interview within a couple days. After the phone interview, I was asked to come in for a 3 hour onsite interview with 4 developers. They all only asked syntax questions and had assignments for me to complete. E.g. how to code an auto-complete feature in JS, how to create a circle with a double border in CSS only, how to write a traffic-light control code, how to code a simple html form. At the end of the interview, however, I learned that the position for which they were interviewing me has already been filled last year and they don't really have a need for another developer. They just left it open in case they find someone extraordinary. I think it may be their standard practice, since I now see a lot of people who interview with them don't get an offer in the end.

Interview process was smooth, no issues there. 3 ppl interviewed me. It was a great interview. I answered all their questions. One interviewer even mentioned that I was able to answer a question that no other candidate has answered. The hiring manager even mentioned that the next step would be another round of management interview. Then suddenly after a few days I get an email that they went ahead with another candidate. I dont want to believe what other reviewers mentioned about 23andMe hiring people more for their compatibility with the young crowd that works there, but it does make me wonder. But overall I had a very positive interview experience. I believe in what they are bringing to the people, and I wish them all the best!