Interview questions

Design a simple API rate limiter

Companies: Microsoft

System Design · System Design Fundamentals

Last reported Feb 2026

Design a system to detect weapon posts

Companies: Meta

System Design

Last reported Feb 2026

Design a Top-K trending items service

Companies: Meta

Real-Time Systems · System Design

Last reported Feb 2026

Design an e-commerce product information collector

Design a service that can fetch and aggregate product details from 100+ vendors for a given product ID, with data expiring every hour and the…

Companies: Agoda

Last reported Feb 2026

Design guardrails and fallback for LLM reliability

Companies: Anthropic

Fault Tolerance & Failover · LLM Applications · System Design

Last reported Feb 2026

Design Real-Time Auctions for Social Posts

Companies: Meta

System Design

Last reported Feb 2026

Design the System Behind a Smart-Scale Weight Tracking App and Staff Its Team

Companies: Google

System Design · System Design Fundamentals

Last reported Feb 2026

Design a CRM Sales Platform

Design a CRM-style sales platform that allows users to manage leads, track sales opportunities through a pipeline, process transactions, and generate sales reports and analytics.

Companies: Udemy

Last reported Feb 2026

Design an Identity and Access Management system for AI agents

Design an IAM system for a cloud provider that allows customers and enterprises to create and manage multiple AI agents with proper access controls and…

Companies: Google

Last reported Feb 2026

Design a high-level logging system

Companies: Microsoft

Observability · System Design

Last reported Feb 2026

Design a bulk order creation system

Design a system that allows users to upload files (CSV, Excel, etc.) to create multiple orders in bulk, with features like file validation, error handling…

Companies: Amazon

Last reported Feb 2026

Design a bulk order processing system

Design a system that accepts order files via email, parses the file contents, and automatically creates bulk orders in an existing order management system.

Companies: Amazon

Last reported Feb 2026

Design a Caching System for Multi-Core, Multi-Disk Systems

Design a distributed caching system that can handle high-throughput read/write operations across multiple cores and spinning disks while ensuring data durability and leveraging…

Companies: Apple, Expedia

Last reported Feb 2026

Design an online coding contest platform

Companies: Meta

System Design

Last reported Feb 2026

Design read-heavy org chart subordinate counts

Companies: Microsoft

Data Structure Design · System Design

Last reported Feb 2026

Design YouTube Likes System

Design a system that allows users to like and unlike videos, efficiently stores and retrieves like counts, provides real-time aggregated metrics for content creators and…

Companies: Oracle

Last reported Feb 2026

Model ads demand data for reporting

Companies: Netflix

System Design

Last reported Feb 2026

Design a Multi-Provider Financial Dashboard

Companies: Amazon

System Design

Last reported Feb 2026

Design an architecture for delivering webhooks to customers.

Companies: Stripe

Last reported Feb 2026

How to host many domains on one IP?

Companies: Google

System Design

Last reported Feb 2026

Design a Drone Collision Alert System

Design a system that can detect potential collisions between drones and other objects (aircraft, buildings, other drones) and provide real-time alerts to prevent accidents.

Companies: Palantir

Last reported Jan 2026

Design TikTok Data Engineering Systems

Companies: Apple

System Design

Last reported Jan 2026