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58 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · ML system design · Object-oriented design · Practical engineering · System design
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URL frontier, politeness, deduplication at scale, distributed workers, failure and trap handling.
Companies: Atlassian, Amazon, Anthropic, Expedia +7
bloom-filters · deduplication · distributed-workers · dns
Last reported Nov 2026
Implement a card PIN validation system that performs numeric checks and length checks (rejecting non-numeric characters). Completed on the HackerRank platform with Agent Mode…
Companies: Atlassian
Last reported Oct 2026
Design an AI agent that ingests data from DevOps systems, Slack channels, and meeting transcripts to maintain an up-to-date view of project status, enabling users…
Companies: Atlassian
Last reported Oct 2026
Companies: Atlassian
API Design · System Design · System Design Fundamentals
Last reported Oct 2026
Given a list of intervals, merge all overlapping (including touching endpoints) intervals and return the minimal set of non-overlapping intervals that cover them. Key pattern…
Companies: Atlassian, Amazon, Antithesis, Apple +16
Array · Quicksort · Sorting
Last reported Oct 2026
Companies: Atlassian
System Design
Last reported Oct 2026
Design a to-do list application similar to iPhone's Reminder app that allows users to create task lists, share lists with other users for collaboration, and…
Companies: Atlassian, Asana, Roblox
Last reported Sep 2026
Companies: Atlassian
System Design
Last reported Sep 2026
Companies: Atlassian
Observability · System Design
Last reported Sep 2026
Companies: Atlassian
API Design · System Design · System Design Fundamentals
Last reported Sep 2026
Design a data structure that supports incrementing and decrementing string counts (removing keys when their count drops to zero) and can return any key with…
Companies: Atlassian, LinkedIn, Meta, Microsoft +2
Design · Doubly-Linked List · Hash Table · Linked List
Last reported Sep 2026
Companies: Atlassian
System Design
Last reported Aug 2026
Design a system that efficiently retrieves top-k items (songs, videos, hashtags, etc.) based on user activity or engagement metrics within specified time windows. The system…
Companies: Atlassian, Amazon, Bloomberg, eBay +10
Last reported Aug 2026
Design a system for managing transactions and generating invoices for multiple small businesses, allowing users to ingest transactions, generate invoices from previously…
Companies: Atlassian
Last reported Aug 2026
Companies: Atlassian, Airbnb, Amazon, Anthropic +14
Last reported Jul 2026
Design a Retrieval-Augmented Generation (RAG) system that enhances large language model responses by retrieving relevant information from external knowledge sources, covering…
Companies: Atlassian, OpenAI, Scale AI
Embeddings & Vector Search · Retrieval-Augmented Generation
Last reported Jul 2026
Given an array of integers and a target value K, find a contiguous subarray whose elements sum to K and return the subarray elements in…
Companies: Atlassian, Walmart
Last reported Jul 2026
Simulate a Snake game on an m×n grid supporting move(direction): the snake advances, grows when it eats sequentially placed food (increasing score), and the game…
Companies: Atlassian, Apple, Bloomberg, Meta +1
Last reported Apr 2026
Design a system that models an organization's department hierarchy and allows users to find the closest common department (lowest shared ancestor) for a given group…
Companies: Atlassian
Last reported Apr 2026
Design a system that displays the top-N most popular content to users in real-time. The system must gather popularity signals (views, likes, shares), compute the…
Companies: Atlassian, Zalando
Last reported Apr 2026
Design an agent rating system that allows customers to rate support agents on a scale of 1–5, retrieve average ratings per agent, and view agents…
Companies: Atlassian
Last reported Apr 2026
Design a machine learning system that can automatically detect and filter spam content in an internal social community platform. The system should be able to…
Companies: Atlassian
Last reported Feb 2026
Design a color picker application that allows users to select colors, save them as favorites, and share their favorite colors with friends. Address scalability challenges…
Companies: Atlassian
Last reported Feb 2026
Design a system that allows team members to collaborate on projects, track progress, share resources, and communicate effectively throughout the project lifecycle.
Companies: Atlassian
Last reported Feb 2026
Design a social media feed system that generates and populates personalized feeds for users on platforms like Twitter, Instagram, or Facebook.
Companies: Atlassian, Amazon, Apple, Bloomberg +5
Last reported Feb 2026