causaLens Machine Learning Engineer Interview Questions
& Process

The hiring process had three main steps. First, an interview with HR. Second, an interview with the Team Lead. Third, what they called 'Day 0'. Day 0 was pretty intense, with a 3-hour technical assessment that focused mainly on coding but also touched on machine learning. After that, there were three 30-minute tech interviews and a final 30-minute cultural interview. The interviews were mostly chill, except for one where they really went deep into the math behind machine learning concepts.

It was a pretty disorganized hiring process. The HR manager didn't really give me any info on what was coming next. First, I had to fill out a questionnaire with typical questions like why I'm applying, why I want to work at causaLens, and why I'm interested in this specific role. Then, there was a 30-minute interview with someone currently in the role. It was mostly easy technical questions and not much about my background. By the time I could ask questions, the interview was almost over because the interviewer had another meeting right after. After that, I had a 20-minute interview with the hiring manager, which ended up lasting about 50 minutes. Surprisingly, it was also mostly technical questions, which I didn't expect given the short scheduled time. The last stage was 'Day Zero,' where I spent the whole day doing various tasks and had several interviews. Everyone except the CEO, who was quite arrogant and condescending, was really friendly and seemed like great people to work with. A major letdown was seeing their website talk about diversity and inclusion, but all the technical folks I interviewed with and saw on LinkedIn were very similar, lacking diversity. It would be better to acknowledge this issue and work on it rather than pretend it's not a problem at causaLens.

So first I had a quick call to chat about my background and why I wanted to join this company. After that, there was a longer technical interview. This technical interview had a coding part and also a discussion about machine learning stuff. The last part was called Day 0. It was in the office and had a 2 hour coding test, then three 30 minute interviews, and one of those was about the coding test I did.