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4 Rounds ~21 Days Hard

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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

All Roles Cloud Engineer 35 Data Engineer 35 Data Scientist 35 DevOps Engineer 35 Frontend Engineer 35 Full Stack Engineer 35 Machine Learning Engineer 35 Product Manager 35 Software Engineer 68

All Topics Algorithms 12 System Design 7 Front-end 6 Culture Fit 4 SQL 2 Backend 1 Leadership 1 Architecture 1

Full Stack Engineer • Behavioral • medium

Tell me about a time you had to disagree with a senior engineer on a technical design.

#Conflict Resolution #Communication #Teamwork

Practice

Full Stack Engineer • Behavioral • medium

Describe a situation where you had to balance technical debt with delivering a feature quickly.

#Project Management #Trade-offs #Decision Making

Practice

Full Stack Engineer • Behavioral • easy

Give an example of how you embodied the 'Members First' core value in a previous project.

#User Empathy #Product Sense #LinkedIn Values

Practice

Full Stack Engineer • Behavioral • medium

Tell me about a time you took ownership of a failing project and turned it around.

#Ownership #Leadership #Problem Solving

Practice

Full Stack Engineer • Behavioral • easy

Describe a time you received difficult feedback from a peer and how you handled it.

#Growth Mindset #Self-Awareness #Professionalism

Practice

Full Stack Engineer • Coding • medium

Design and implement an LRU Cache to store recently viewed LinkedIn profiles.

#Data Structures #Linked List #Hash Map

Practice

Full Stack Engineer • Coding • hard

Given a stream of job postings, design a class to efficiently find the top K most frequently required skills.

#Heap #Hash Map #Streaming Data

Practice

Full Stack Engineer • Coding • medium

Given a graph of LinkedIn users, write a function to find the shortest path (degrees of separation) between two users.

#Graph #BFS #Data Structures

Practice

Full Stack Engineer • Coding • medium

Given a list of a user's job experiences represented as time intervals, merge all overlapping intervals to find their total actual time employed.

#Arrays #Sorting #Intervals

Practice

Full Stack Engineer • Coding • medium

Implement a function to render a nested comment thread on a LinkedIn post, given a flat array of comment objects with parentIds.

#JavaScript #Recursion #DOM Manipulation

Practice

Full Stack Engineer • Coding • medium

Write a function to implement a debounced search bar for the LinkedIn global search.

#JavaScript #Closures #Asynchronous Programming

Practice

Full Stack Engineer • Coding • medium

Design a React component for the LinkedIn Feed that supports infinite scrolling.

#React #Intersection Observer #Pagination

Practice

Full Stack Engineer • Coding • hard

Given a string representing a user's profile summary, write a function to justify the text (Left, Right, or Center) to fit within a specific column width.

#Strings #Formatting #Edge Cases

Practice

Full Stack Engineer • Coding • medium

Find the Lowest Common Manager (LCA) for two employees in the LinkedIn org chart.

#Trees #DFS #Recursion

Practice

Full Stack Engineer • Coding • medium

Implement a Trie data structure to support typeahead suggestions for LinkedIn connections.

#Trie #Strings #Design

Practice

Full Stack Engineer • Coding • medium

Write a function to flatten a deeply nested JSON object representing a LinkedIn user's full data export.

#Recursion #JSON #Object Manipulation

Practice

Full Stack Engineer • Coding • medium

Implement Promise.all from scratch.

#JavaScript #Async #Promises

Practice

Full Stack Engineer • Coding • medium

Given a matrix representing a network grid, find the number of isolated connection clusters (Number of Islands).

#Graph #DFS #BFS

Practice

Full Stack Engineer • Coding • easy

Given an array of integers representing daily profile views, find the maximum subarray sum (highest engagement period).

#Arrays #Dynamic Programming

Practice

Full Stack Engineer • Coding • medium

Write a function to determine if two users are exactly 3 degrees of separation apart.

#Graph #BFS #Search

Practice

Full Stack Engineer • Coding • medium

Implement a function to parse a URL query string into a JavaScript object, handling arrays and encoded characters (used for job search filters).

#JavaScript #String Parsing #Web APIs

Practice

Full Stack Engineer • Coding • hard

Given a list of connections and their skills, write an algorithm to recommend 5 new skills to a user based on what their connections have.

#Hash Map #Sorting #Recommendation Systems

Practice

Full Stack Engineer • Coding • medium

Implement an Event Emitter class in JavaScript to handle custom UI events on the LinkedIn feed.

#JavaScript #Design Patterns #Object Oriented Programming

Practice

Full Stack Engineer • System Design • hard

Design the LinkedIn News Feed.

#Architecture #Scalability #Databases #Caching

Practice

Full Stack Engineer • System Design • hard

Design the 'People You May Know' (PYMK) recommendation system.

#Graph Processing #Batch Processing #Machine Learning Infrastructure

Practice

Full Stack Engineer • System Design • hard

Design LinkedIn Messaging. It needs to support 1-on-1 and group chats with real-time updates.

#WebSockets #Real-time #Databases #Microservices

Practice

Full Stack Engineer • System Design • medium

Design a system to track and display 'Who viewed your profile' in real-time.

#Stream Processing #Caching #Aggregation #Kafka

Practice

Full Stack Engineer • System Design • hard

Design the LinkedIn Job Search system.

#Search Engines #Elasticsearch #Microservices

Practice

Full Stack Engineer • System Design • medium

Design the LinkedIn Endorsement system, where users can endorse connections for specific skills.

#Databases #API Design #Scalability

Practice

Full Stack Engineer • System Design • medium

Design a rate limiter for the LinkedIn Connections API to prevent scraping.

#Security #Distributed Systems #Algorithms

Practice

Full Stack Engineer • Technical • medium

How would you optimize the initial load time of the LinkedIn profile page?

#Performance #Front-end #Networking

Practice

Full Stack Engineer • Technical • medium

Explain how you would handle race conditions when two recruiters try to update the same job posting simultaneously.

#Concurrency #Databases #Java

Practice

Full Stack Engineer • Technical • medium

How does Kafka fit into an event-driven architecture? Give an example of how LinkedIn might use it for post engagements.

#Kafka #Distributed Systems #Messaging

Practice

Full Stack Engineer • Technical • medium

Design a database schema for LinkedIn connections, handling states like pending, accepted, and blocked.

#Schema Design #SQL #Normalization

Practice

Full Stack Engineer • Technical • medium

Write a SQL query to find the top 3 universities with the highest number of alumni currently working at LinkedIn.

#SQL #Aggregation #Joins

Practice

Difficulty Radar

Based on recent AI-sourced data.

Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

Simulate

Unwritten Rules

Think Out Loud

Always explain your thought process before writing code or drawing architecture.

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