Real, anonymous reports from people who interviewed for Data Scientist at Klaviyo, newest first and distilled into what to expect across the loop.
I applied online with a referral and then got contacted by a recruiter shortly after. The timing felt a bit unusual because I’d just gone through interviews for another team, and it looked like the outcome of that process influenced what happened next. My impression was that internally they’d decided I was a better fit for a different team, even though nobody from the first team had the authority to hire into the second.
After applying and getting in through a referral, I was contacted by a recruiter fairly quickly. I remember thinking the process felt friendly and controlled, because the recruiter gave a detailed overview of what each step would look like and what they expected from me. The timeline and overall vibe were mostly relaxed—I didn’t feel the usual stress you get when every stage feels high-stakes.
Candidates consistently noted effective communication from recruiters, providing clarity on the interview process and expectations at each stage, which helped reduce stress and uncertainty.
The interview process typically included an initial HR screen followed by multiple technical rounds, often featuring a mix of coding, probability, and case study discussions, creating a clear progression from general to specific evaluations.
Interviews emphasized core data science skills, including hypothesis testing, A/B testing, and SQL, with varying levels of depth depending on the interviewer, which impacted candidates' experiences.
Candidates experienced a range of interpersonal styles during interviews, from friendly and engaging to flat and disengaged, which significantly influenced their overall impressions of the process.
While many candidates did not receive offers, they appreciated constructive feedback from recruiters, though some felt the final decisions lacked transparency and left them with lingering questions.
Candidates expressed concerns about team diversity and alignment with their career growth aspirations, indicating that the perceived culture and team dynamics played a crucial role in their interest in the position.