I applied online. I interviewed at TikTok (San Diego, CA) in Nov 2025
Interview
Had two rounds of technical interview. Professional interviewer and in-depth questions. Interviewers were patient and guiding, and the questions were closely related to their app and product. Generally neutral experience.
Interview questions [1]
Question 1
If a certain feature has seen tremendous growth in user engagement, how will you analyze its positive/negative impact on the platform?
3 rounds of tech interviews + 1 round of HR
Every tech interview has a coding test and a project discussion.
Code tests are LeetCode medium-level questions.
They asked a lot about my publications and the details of each model
3 round of online interviews. The first round was with the mentor himself and comes with an OA. The second round was with the DS team senior leadership, mainly discussing about past experiences. The final round was with the HM.
Interview questions [1]
Question 1
If the AB Test results in an uplift in one sector (for example: TikTok For Your Page), but a decrease in another sector (for example: TikTok Shop), how will you make final decision on the rollout of this test as a data scientist?