I applied online. I interviewed at ByteDance (Singapur)
Interview
The ByteDance technical interview process is a multi-stage experience, covering a variety of topics essential to data science and software engineering roles. It generally consists of three rounds, not including an HR discussion. First Technical Interview: The 60-minute session begins with a 20-minute self-introduction and resume discussion, focusing on a key data project. This is followed by 20 minutes of SQL and algorithmic coding challenges. The remainder is a quick Q&A. Second Technical Interview: This interview further explores your background in data science projects. Algorithmic challenges are still present but slightly more complex, encompassing topics like implementing a sqrt() function and merging sorted lists. The interviewer may also include probability and expectation questions. Third Technical Interview: Conducted by a manager, this round is more of a casual chat, touching on both technical topics like SQL and probability, and your preferences or requirements concerning the job role. An HR interview will follow these technical rounds, focusing on behavioral and cultural fit.
Interview questions [1]
Question 1
First Technical Interview Can you describe a data project that had the most impact or was the most interesting? SQL: How many new invitors are there between 2021-06-01 and 2021-06-07? Algorithm: Return the number of triplets that can make triangles from a given integer array. Second Technical Interview Describe a data science project where you had to work closely with other departments. Algorithm: Implement a sqrt() function with an output rounded to 2 decimals. Algorithm: Merge three sorted lists into one sorted list. What's the time complexity? Third Technical Interview What SQL functions are you most familiar with? Probability: What's the expected number of rounds for a game to end if you have a 1/2 chance of winning and need two consecutive wins to end the game? HR Interview What are your career goals and how do they align with this role? Do you have any location preferences or job role requirements?
I applied online. I interviewed at ByteDance (Shanghái, Shanghai) in Dec 2025
Interview
First round technical interview with a senior member from the team, 45 mins equally divided into resume questions, 1 sql problem involving window function and ctes, and discussion around statistical concepts/scenarios.
HR reach out to me invite me to take a Data Scientist interview, and scheduel an interview for me. I only took one interview asking about project-related questions，and some questions about statistics, experimentation, and modeling，and one open-ended question.
Interview questions [1]
Question 1
How to estimate TikTok's daily advertising revenue without access to internal data?
Submitted application through referral link. Received recruiter phone screening within a few days. And then immediately asked for availability to schedule the 1st round technical interview with one of the team members.
Interview questions [1]
Question 1
Walk me through your resume and elaborate on what problems you solved with data and what metrics you used.
