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
Backend Engineer
•
Technical
•
hard
How would you handle a 'Thundering Herd' problem when a celebrity with 100 million followers tweets, and millions of users try to reply or like it simultaneously?
#Concurrency
#Caching
#Load Balancing
Backend Engineer
•
Technical
•
hard
You are tasked with migrating a legacy monolithic service to microservices to reduce compute costs. How do you approach this with zero downtime?
#Microservices
#Migration
#Strangler Fig Pattern
Backend Engineer
•
Technical
•
medium
Discuss the trade-offs between using gRPC vs REST for internal microservice communication at X.
#Networking
#gRPC
#API Design
Frontend Engineer
•
Technical
•
medium
How do you handle state management for a global entity like the 'current user' versus highly localized state like a 'tweet draft' in a large-scale React app?
#State Management
#Redux
#Context API
Frontend Engineer
•
Technical
•
medium
Describe how you would implement optimistic UI updates when a user clicks the 'Like' button on a tweet, including error handling and rollback.
#Optimistic UI
#Error Handling
#Network Requests
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
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Think Out Loud
Always explain your thought process before writing code or drawing architecture.