I applied online. The process took 2 weeks.

The interview process consists of 4 rounds:

• 1: A technical interview to discuss previous experience, how you have worked with teams in the past, and evidence of working with stakeholders. It helps to mention any work where you have used concurrency.
• 2: Take-home task. This is a fairly well-known task and should be doable.
• 3: Take-home review call. On this call, you will talk over your solution. Prepare to answer what iterations you went through, the limitations of your implementation, and why you chose to implement it in the way you did.
• 4: Stage 4 is a system design interview.

Unfortunately, I was rejected after stage 3. Admittedly, I did stumble over answering a question surrounding concurrency. I requested feedback, which arrived a few days later. Frustratingly, the interviewer suggested my solution was good and addressed all of the points, but hadn't explained some topics (which I had). The feedback also suggested that I was "too focused on the problem" and didn't talk about future improvements. This was frustrating feedback, since the interviewer guided the interview topics and didn't cover future improvements (which there was a list of in the README and noted down).

Overall, the interview process was ok. The rejection feedback was appreciated but not overly helpful. Reading between the lines, perhaps they simply have too many candidates and they were nitpicking.

Work on your knowledge of concurrency.