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
•
System Design
•
hard
Design a recommendation system for the 'For You' timeline. How do you balance chronological relevance with algorithmic personalization?
#Recommender Systems
#Ranking
#Two-Tower Models
Data Scientist
•
System Design
•
hard
How would you build a machine learning model to detect spam or bot accounts in real-time as they register or tweet?
#Anomaly Detection
#Streaming
#Classification
Data Scientist
•
System Design
•
medium
How would you design a system to rank 'Trending Topics' in real-time?
#Ranking
#Time Decay
#NLP
Data Scientist
•
System Design
•
hard
Design a Graph ML system to power the 'Who to Follow' recommendations.
#Graph Neural Networks
#Link Prediction
#Scalability
Data Scientist
•
Technical
•
medium
How would you build an NLP model to classify and hide highly toxic replies in a tweet thread?
#NLP
#Classification
#Trust & Safety
Data Scientist
•
Technical
•
medium
How would you predict user churn for X Premium subscribers? What features would be most important?
#Classification
#Survival Analysis
#Feature Engineering
Data Scientist
•
Technical
•
hard
How would you optimize the creator ad revenue sharing model to ensure fairness while maximizing overall platform content creation?
#Optimization
#Allocation
#Economics
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.