TikTok Frontend Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 115 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at TikTok.
TikTok
Frontend Engineer
Entry Average Positive experience Accept offer 4 rounds
Interview process
Technical screen Technical screen Technical screen Onsite
Interview formats
Coding Technical Behavioral
First up, there's a HackerRank online assessment. If you do well, you'll move on to a LeetCode-style data structures and algorithms round. Then, there's a Frontend/React coding round where you'll build UI components, manage state, handle events, and talk about performance. The last step is a hiring manager interview to check your experience, how you collaborate, and if you're a good fit for the team and product.
Confirmed questions2 questions
- What is the longest arithmetic subsequence?
- How to implement an image carousel with smooth transitions?
TikTok
Frontend Engineer
Intern Average Positive experience No offer 1 round
Interview process
Technical screen
Interview formats
Technical Coding
It was a smooth process and they mostly asked questions based on my resume, focusing on frontend fundamentals like the meaning of 302 responses, the distinction between stateful and stateless concepts, and how frontend and backend communicate. They also gave me a coding challenge to create a calculator that accepts string inputs.
Confirmed questions1 question
- Can you build a calculator that takes string inputs?
TikTok
Frontend Engineer
Mid Difficult Neutral experience No offer 4 rounds
Interview process
Recruiter call Technical screen Onsite Background check Offer
Interview formats
Coding System Design Behavioral
The interview process at TikTok was really well-organized and moved fast. It started with a recruiter call where we chatted about my experience and what I'm looking for. Then, I had a technical screen with a frontend engineer. This involved a live coding challenge using JavaScript and React. After that, I moved onto the onsite interviews, which were virtual and had 3 parts: system design with a frontend angle, coding, and behavioral. The interviewers were all very professional, and the questions were tough but fair. The whole thing wrapped up in about 3 weeks.
Confirmed questions2 questions
- Could you explain how to create a custom hook for API data fetching in React?
- What's your approach to designing a live chat widget that supports real-time message updates and can be embedded anywhere?
TikTok Frontend Engineer Interview Questions
Quoted word for word from TikTok interview reports.
“Write a function to generate all possible letter combinations that a given number could represent on a phone keypad.”
Read reports →“What is the memory footprint for a 12x12 pixel image?”
Read reports →“Given N orders, where the i-th order has p[i] pizzas, and you can only make a limited number of trips with a certain capacity each time, and you must take orders in sequence, what is the minimum capacity required?”
Read reports →“Given const a = Foo.prototype; const b = Object.getPrototypeOf(new Foo()); const c = Object.getPrototypeOf(Foo); are a, b, c equal to each other?”
Read reports →“Regarding TCP, which layer does it operate on, and what are the reasons for not using UDP?”
Read report →“How would you flatten an array and also remove duplicate elements from it?”
Read report →“What methods can be used to prevent duplicate submissions from multiple clicks on a checkout or payment button?”
Read report →“Can you explain what useMemo is and provide scenarios for its use?”
Read report →“Can you create a Promise that retries a failed fetch operation a specified number of times, with each retry delayed by a duration corresponding to the Fibonacci number of the retry attempt?”
Read report →Formats, difficulty and experience
Across all 115 TikTok interview reports.