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
•
Technical
•
hard
How do you handle network effects and interference when running an A/B test on a highly connected social graph like X?
#Network Effects
#Graph Clustering
#A/B Testing
Data Scientist
•
Technical
•
hard
If we introduce long-form tweets, how do you account for the novelty effect in your A/B test analysis?
#Statistical Significance
#Novelty Effect
#User Behavior
Data Scientist
•
Technical
•
hard
When would you choose a Multi-Armed Bandit approach over traditional A/B testing for optimizing ad placements on X?
#Multi-Armed Bandit
#Reinforcement Learning
#Optimization
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.