What's New?

January 2026

Flash Sale System — Deep Dive 3: Distributed Transactions & Inventory Holds
New
Flash Sale System · Whiteboard22 Jan 2026
Eoin
Google Maps — API Design
New
Google Maps · Whiteboard22 Jan 2026
Eoin
Google Maps — Data Model
New
Google Maps · Whiteboard21 Jan 2026
Eoin
Metrics Monitoring and Alerting (Datadog, Prometheus) — Deep Dive 2: Real-Time Alerting Engine
New
Metrics Monitoring & Alerting · Whiteboard20 Jan 2026
Eoin
Top-K Leaderboard — Deep Dive - Scaling the Leaderboard
New
Top K Leaderboard · Whiteboard19 Jan 2026
Eoin
Music Streaming Service (Spotify) — Deep Dive 2: ML Recommendation Pipeline
New
Music Streaming Service · Whiteboard16 Jan 2026
Eoin
Ticket Booking System (Ticketmaster) — API Design
New
Ticket Booking System · Whiteboard16 Jan 2026
Eoin
Autocomplete System (Google Search) — API Design
New
Autocomplete System · Whiteboard15 Jan 2026
Eoin
Autocomplete System (Google Search) — Deep Dive - Zero-Downtime Updates
New
Autocomplete System · Whiteboard14 Jan 2026
Eoin
Music Streaming Service (Spotify) — API Design
New
Music Streaming Service · Whiteboard14 Jan 2026
Eoin
Ticket Booking System (Ticketmaster) — Deep Dive - Handling Concurrency & Double Booking
New
Ticket Booking System · Whiteboard13 Jan 2026
Eoin
Top-K Leaderboard — API Design
New
Top K Leaderboard · Whiteboard12 Jan 2026
Eoin

October 2025

Cloud File Sharing Service (Dropbox, Google Drive) — Deep Dive - Minimizing Data Transfer
New
Cloud File Sharing Service · Whiteboard29 Oct 2025
Eoin
Cloud File Sharing Service (Dropbox, Google Drive) — API Design
New
Cloud File Sharing Service · Whiteboard28 Oct 2025
Eoin
Web Crawler — Deep Dive - System Flow
New
Web Crawler · Whiteboard28 Oct 2025
Eoin
Web Crawler — API Design
New
Web Crawler · Whiteboard27 Oct 2025
Eoin
Rate Limiter — High-Level Design
New
Rate Limiter · Whiteboard27 Oct 2025
Eoin
Rate Limiter — Core Entities
New
Rate Limiter · Whiteboard24 Oct 2025
Eoin
E-Commerce Platform (Amazon, eBay) — Deep Dive - Checkout & Order Placement Flow
New
Ecommerce Platform · Whiteboard23 Oct 2025
Eoin
Rate Limiter — API Design
New
Rate Limiter · Whiteboard23 Oct 2025
Eoin