TikTok ML System Design Interview Questions

Practice the exact questions companies are asking right now.

7 Questions 1 Company02.12.2026
Showing 7 results
Role
TikTok logo
TikTok
Medium
Machine Learning EngineerNew Grad

Design video captioning under compute limits

Scenario You work on a multimodal team at a large short-video platform. The team has a multimodal large model that takes a video (sampled frames, with...

ML System Design
7
0
104 people solved
Feb 12, 2026
TikTok logo
TikTok
Medium
Machine Learning Engineer

Design a model to choose dynamic K

Problem You are building a recommender system with a two-stage ranking pipeline: 1. Candidate retrieval (recall): fetch top-K candidates for a request...

ML System Design
11
0
83 people solved
Feb 11, 2026
TikTok logo
TikTok
Hard
Software EngineerIntern Locked

What skills are needed for AI infra roles?

This question evaluates familiarity with AI infrastructure and LLM serving, including systems and performance engineering, model inference mechanisms,...

ML System Design
10
0
79 people solved
Jan 6, 2026
TikTok logo
TikTok
Medium
Machine Learning Engineer Locked

Design training for multimodal embedding model

This question evaluates proficiency in end-to-end multimodal embedding system design, including model architecture, supervision and loss strategies, e...

ML System Design
4
0
56 people solved
Jan 22, 2026
TikTok logo
TikTok
Medium
Software Engineer

Design system to detect privacy-leak records

You are given a very large database that contains user data (both structured fields and unstructured text such as logs, messages, and documents). The ...

ML System Design
4
0
50 people solved
Dec 8, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer

Design LLM-enhanced recommendation solutions

Design LLM-enhanced recommendation solutions System Design: Incorporating Large Language Models (LLMs) into a Large-Scale Recommendation System Contex...

ML System Design
5
0
73 people solved
Aug 8, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer

Design query generation to maximize CTR

Design query generation to maximize CTR Design an end-to-end query-generation system that maximizes click-through rate (CTR) for a large-scale search/...

ML System Design
6
0
58 people solved
Jul 31, 2025

Explore more TikTok ML System Design interview questions

Real questions from candidate reports, grouped by role, topic and company.

Other categories at TikTok
ML System Design questions at other companies
Browse all