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
•
Coding
•
medium
Write a function to implement an LRU (Least Recently Used) Cache. This is often used for caching user profiles in memory.
#Linked List
#Hash Map
#Design
Backend Engineer
•
Coding
•
medium
Implement a Trie (Prefix Tree) to support autocomplete for user handles (@mentions).
#Trie
#Design
#String
Backend Engineer
•
Coding
•
hard
Implement a basic LFU (Least Frequently Used) Cache.
#Hash Map
#Linked List
#Design
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.