Worst interview experience with no support from recruiter to set you up for success. Recruiter was unresponsive and gives wrong information on what to expect during technical rounds so be prepared to have a completely different interview than what was communicated.
A former colleague referred me to the Data Scientist position at TikTok, which kicked off the interview process. The technical screen included a question about designing an A/B test for a ranking model, followed by an SQL challenge related to user sessions. The funny part was that the SQL problem was a twist on one I had been grinding through on PracHub just a few days prior. After some behavioral interviews, I received an offer, but ultimately decided to decline as it didn't align with my goals.
Domande di colloquio [2]
Domanda 1
Walk me through how you'd design an A/B test for a new ranking model on the For You feed, and how you'd pick guardrail metrics.
Given a sessions table (user_id, session_start, session_end, country), write SQL to find the users whose average session length grew the most week-over-week.
Ho presentato la mia candidatura online. Ho sostenuto un colloquio presso TikTok (Londra, Inghilterra)
Colloquio
one medium level sql test and an open question
Since i'm not familiar with business context(though i actually spent time preparing AB test and causal inference), i didn't get what i should answer.
Domande di colloquio [1]
Domanda 1
if tiktok shop is going to launch in Netherland, how to evaluate it before AB test