TikTok

Data Engineer Interview Experience - United States

August 31, 2025

Positive ExperienceNo Offer

Process

The hiring manager is from China and asked me basic knowledge about data modeling and Spark.

Then, a basic retention SQL question and a LeetCode medium problem were presented.

All language used during the process was Chinese.

Questions

A user retention SQL query.

Data modeling concepts:

Star schema
Snowflake schema

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Interview Statistics

The following metrics were computed from 33 interview experiences for the TikTok Data Engineer role in United States.

Success Rate

Pass Rate

TikTok's interview process for their Data Engineer roles in the United States is extremely selective, failing the vast majority of engineers.

Experience Rating

Positive58%

Neutral36%

Negative6%

Candidates reported having very good feelings for TikTok's Data Engineer interview process in United States.

TikTok Interview Questions

Subarray Sum Equals K

Medium

Determine the total number of continuous subarrays within a given array that sum up to a specific target value, k.

ArraysSliding Windows

Longest Substring Without Repeating Characters

Medium

Find the length of the longest substring within a given string that contains no repeating characters. The substring must be contiguous.

StringsSliding Windows

Generate Parentheses

Medium

Given a number 'n', generate all possible well-formed (balanced) parentheses strings of length 2*n. For instance, if n=3, you need to create all valid combinations like '((()))', '(()())', etc.

RecursionStrings