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
Cloud Engineer
•
System Design
•
hard
X has recently moved several workloads from AWS back to on-prem bare metal to save costs. Walk me through how you would architect the migration of a massive stateful service (like a distributed database) from AWS to an on-prem data center with zero downtime.
#Cloud Migration
#Bare Metal
#Database Replication
#Networking
Cloud Engineer
•
System Design
•
medium
Design a cost-optimized storage tiering system for X's media assets (images and videos) that balances retrieval speed with AWS S3/GCS storage costs.
#Storage
#Cost Optimization
#AWS S3
#CDN
Cloud Engineer
•
Technical
•
medium
What are the engineering and financial tradeoffs between using managed cloud databases (like AWS RDS or GCP Spanner) versus self-hosting databases on bare metal servers?
#Cost Optimization
#Databases
#Bare Metal
#Cloud Computing
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.