Doximity Data Engineer Interview Questions
& Process

I applied on LinkedIn and heard back from the recruiter in about 2 days to schedule a phone call. We had a 30-minute recruiter phone call where they explained the process and mentioned a potential next step: a 4-hour take-home assignment. I actually enjoyed working on the coding assignment and had a good time doing it. Unfortunately, I got rejected pretty quickly after submitting it. Even though I was disappointed, I reflected on the assignment and tried to figure out what the interviewers might have been looking for. The assignment's core task was to fetch data from source A and compare it with source B, which sounds like a typical data engineer task. However, there were a few tricky parts. First, the PM's email mentioned understanding the overlap between the sources, implying that the usefulness of the data wasn't yet confirmed. My initial thought was to just get the overlap number to the PM and worry about optimizing performance later. Second, Source B was described as a data warehouse, but I didn't have write access to it. My thinking was that for a quick comparison, this setup was fine, and for production, I'd use an ELT pattern, load Source A into the warehouse, and then compare. I wondered why we'd need to run a comparison on millions of rows in a separate container for this specific use case. Third, there was a note about a 15-minute execution time limit, requiring an explanation if it took longer. My code ran in under 4 minutes, so I figured performance wasn't an issue. In hindsight, maybe my approach wasn't what they were looking for, and I didn't think like the rest of the team. It's possible we just weren't a good fit.

The whole process was kind of a bummer. It started with a phone call, then a take-home test, and finally an on-site with four technical rounds. Honestly, the job posting was misleading; they were actually looking for a lead data engineer. The interviewers seemed totally unprepared and disinterested, making me wonder why I was even brought on-site. I never got any proper feedback, and after the interviews, they ghosted me. When I emailed them, they just said the role was filled. I had other offers and was just waiting around like a fool.

I had a good interview with Doximity. The process was pretty organized and the interviewer was nice and professional. But, the questions felt a bit too standard and didn't really let me show what I can do. Still, it was useful, and I got a sense of the company culture and values.