I applied online. The process took 4 days. I interviewed at TikTok (San Jose, CA) in Sep 2025
Interview
past project discussion (dive deeper to the detail implementation and ask the reason to do certain experiments or design certain algorithms)
ml questions (basic ml + NLP)
leetcode (usually dp and two pointers)
I applied through a recruiter. I interviewed at TikTok in Jul 2025
Interview
The interview is comprised of a resume interview. Followed by dig in from the resume asking about Machine Learning/LLM questions. Then, it is thecode heavy portions including Machine Learning related coding and Leetcode.
Interview questions [1]
Question 1
Solve N queen problem. How many possible ways are there?
I applied through a recruiter. The process took 4 weeks. I interviewed at TikTok (San Francisco, CA) in Aug 2025
Interview
Recruiter reach out. Then recruiter conversation. They want to match you with a team before interviewing you. So I waited almost 2 weeks to get matched with a team. After that was a phone screen - leetcode medium. For onsite, there are 2 ML design rounds, 2 coding rounds, a hiring manager round. Took almost a month to finish that off.
Interview questions [1]
Question 1
How to model a signal and use that to improve ads ranking system