Coupang Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
Design a PKI for internal mTLS and certificates
System Design Prompt Design a Public Key Infrastructure (PKI) for an organization to issue and manage certificates used for: - Internal mTLS between s...
Compute minimal flips connecting two islands
Given an n x n binary grid of 0s (water) and 1s (land) containing exactly two disjoint islands (cells with 1 connected 4-directionally), return the mi...
Design large video upload for a YouTube-like app
System Design Prompt Design the video upload subsystem for a YouTube-like product that supports large video files. Core user flow 1. User selects a la...
Design an IAM system for services and users
System Design Prompt Design an Identity and Access Management (IAM) system for an organization/platform. The system must support: - Human users and se...
Find shortest distance between two islands
Problem You are given an R x C binary grid where: - 1 represents land - 0 represents water The grid contains exactly two 4-directionally connected isl...
Describe your proudest project and dive deep
Behavioral Prompt: Project You’re Most Proud Of Context: Onsite software engineer behavioral interview. Choose one project and walk the interviewer th...
Sort products by price and attention score
You are given a list of strings, each formatted as "product,price,attention". Parse the list into records and return the product names sorted to prior...