Twitter / X
Real-time social platform with petabyte-scale data and ML ranking systems.
4 Rounds
~14 Days
Hard
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Full Stack Engineer
•
Coding
•
medium
Write a function to calculate the length of a Tweet. Note that URLs always count as 23 characters, and emojis/special Unicode characters should be counted correctly as single characters despite surrogate pairs.
#String Manipulation
#Regex
#Unicode
Full Stack Engineer
•
Coding
•
medium
Implement a rate limiter for the X API that allows a user to make N requests per time window T. How would you handle this in a distributed environment?
#Sliding Window
#Concurrency
#Distributed Systems
Full Stack Engineer
•
Coding
•
hard
Given K sorted arrays representing timelines of users you follow, merge them into a single sorted timeline of the most recent tweets.
#Heaps
#Merge Sort
#Arrays
Full Stack Engineer
•
Coding
•
hard
Find the shortest path between two users on X (Degrees of Separation). You are given an API call `getFollowers(userId)`.
#Graph Traversal
#BFS
#Bidirectional BFS
Full Stack Engineer
•
Coding
•
easy
Write a function to parse a raw tweet string and extract all valid hashtags, ignoring punctuation immediately following the tag.
#String Parsing
#Regex
Full Stack Engineer
•
Coding
•
medium
Given a stream of tweets, write an algorithm to find the Top K frequent words (Trending Topics) in the last hour.
#Heaps
#Hash Maps
#Stream Processing
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.