The interview started with an one-week, open-book and open-resource challenge question. These questions cover topics from chemical biology to probability. Once you pass the challenge questions, you are then invited to an on-site interview, which includes multiple one on one meetings with team members, manager, and two presentations.

1. talked with HR over phone for 30 minutes and scheduled a test. 2. received test on Monday and had one week to answer the question sets. The questions are very difficult and are in math, organic chemistry, biology and chemical engineering. Some questions are actually vague and need to be more clarified. You need to spend A LOT OF time on it during the week. (40 hr+) 3. I passed the test and had a one-day virtual on-site. Some people are friendly but some left me with a not so good impression. Someone kept emphasizing that this job is fast paced and can be stressful. And some people asked me wired behavioral questions. 4. Got reject email finally, not explaining too much why. Overall, the process is tiring and I would not recommend you applying if you are busy with your current work and are not that into what they are doing. What I learned is this job is really stressful.