Me postulé a través de una recomendación de un empleado. Acudí a una entrevista en TikTok (San Jose, CA) en sep 2025
Entrevista
I passed the first round immediately. The interviewer was clear, personable, and highly professional. She asked thorough technical questions, was responsive throughout, and guided me skillfully through the process. By the end, I had a comprehensive understanding of the company.
However, the second round was disappointing. My interviewer appeared to be a potential future colleague who was unprepared—he conducted the interview from his bedroom with a messy bed visible behind him, suggesting he had just woken up. The overall experience felt unprofessional, and I felt disrespected.
Preguntas de entrevista [1]
Pregunta 1
What is the full procedure of conducting an AB Test?
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.
Preguntas de entrevista [2]
Pregunta 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.
Me postulé en línea. Acudí a una entrevista en TikTok (Londres, Inglaterra)
Entrevista
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.
Preguntas de entrevista [1]
Pregunta 1
if tiktok shop is going to launch in Netherland, how to evaluate it before AB test