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
Data Scientist
•
Coding
•
easy
Write a Python function to parse and extract all unique trending hashtags from a massive stream of tweet texts efficiently.
#Regex
#Strings
#Data Structures
Data Scientist
•
Coding
•
medium
Given a dataset of user sessions, write a Python script to merge overlapping session time intervals.
#Sorting
#Intervals
#Arrays
Data Scientist
•
Coding
•
easy
Write a Python function to calculate the cosine similarity between two sparse user-feature vectors.
#Math
#Arrays
#Linear Algebra
Data Scientist
•
Coding
•
medium
Given an array of daily tweet counts for a specific hashtag, write a Python function to find the longest contiguous streak of days where the count strictly increased.
#Arrays
#Dynamic Programming
Data Scientist
•
Coding
•
medium
Implement a basic TF-IDF algorithm from scratch in Python for a small corpus of tweets.
#NLP
#Hash Maps
#Math
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.