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S1E28 Buffered, Eventually - Youtube System Design
Buffered, Eventually is a system design podcast where two senior engineers break down how large-scale video platforms like YouTube are built—and the tradeoffs behind every layer.We discuss video…
S1E27 Indexed, Eventually
Indexed, Eventually is a system design podcast where two senior engineers break down how large-scale post search systems are built—and where they break first.Using a Facebook-style post search as a…
S1E26 Fitness Tracking Apps - Feed Meets Telemetry
Feed Meets Telemetry is a system design podcast where two senior engineers break down how fitness platforms like Strava are built—and the tradeoffs behind every design choice.We talk about activity…
S1E25 Nearest Cab - Uber System Design
Nearest cab is a system design podcast where two senior engineers break down how ride-hailing platforms like Uber are built—and the tradeoffs behind every decision.We discuss real-time matching,…
S1E24 Verified Review - A Review platform at scale
Verified Review is a system design podcast where two senior engineers break down how local business review platforms are built—and the tradeoffs behind every design choice.The conversations are…
S1E23 At Scale: Messaging System
A system design podcast where two senior engineers break down how messaging platforms like WhatsApp are built at scale—and the tradeoffs behind every architectural choice.We discuss core problems…
S1E22 Scroll Culture - News Feed Design
The Scroll is a system design podcast where two senior engineers break down how real-world systems are built—and the tradeoffs behind every decision. From news-feed architectures and recommendation…
S1E21 Why This App Knows When Prices Drop
That price-drop alert didn’t come from vibes.This episode explains how price tracking systems like CamelCamelCamel work — from crawling and deduping product data to alerting users at scale — in a…
S1E19 Instagram Isn’t Just Photos
That feed refresh is doing a lot of work.This episode breaks down how Instagram’s system design handles uploads, timelines, likes, and massive traffic — explained in a chill, no-textbook way.
S1E20 Why Live Comments Don’t Lag (Usually)
That comment flying up the screen didn’t just magically appear.This episode explains how Facebook Live-style comment systems work — handling real-time writes, massive fanout, and ordering — all…
S1E18 Calm Down, API
Not every request deserves to get through.This episode explains how distributed rate limiters work — how systems track requests, stay consistent across nodes, and fail gracefully — all in a clean,…
S1E17 Your News Feed Isn’t Random
That headline didn’t just show up by accident.In this episode, we explore how news aggregators like Google News work under the hood — from content ingestion and deduplication to ranking, freshness,…
S1E16 LeetCode, But From the Backend
You solve the problems — but how does the platform work?This episode explores the system design behind a LeetCode-style platform, covering code execution, problem storage, user submissions, scaling,…
S1E15 Clouded Thoughts: How Dropbox & Google Drive Actually Work
In this episode, we break down how modern file storage systems like Dropbox and Google Drive work — from syncing and version control to scalability and reliability — in a way that doesn’t feel like a…
S1E14 The Doc That Never Sleeps
Ever typed in Google Docs and watched someone else edit mid-sentence? We unpack the real-time magic behind collaborative editing—OT vs CRDTs, syncing state, conflict resolution, and how Docs stays…
S1E13 The K in OK - Top K Recommendation System
YouTube’s recommendation engine works overtime to find your personal top picks. We explore how it filters candidates, scores them, and ranks the winners—kind of like a talent show, but with neural…
S1E12 Swipe Right on Payments
Why does a simple “Buy Now” click trigger a whole fintech orchestra? We unpack the tech behind modern payment gateways—auth flows, settlement, risk checks, and the whole vibe. Secure payments, but…
S1E11 Crawl Me Maybe
Ever wondered how websites get scraped, indexed, and turned into searchable magic? We break down web crawlers—how they think, how they roam, and why they occasionally break the internet. System…
S1E10 Next Up: Your New Addiction
YouTube’s recommendation engine is basically that friend who gets you. But how does it work? We decode the machine-learning magic, the watch-time traps, and the wild design behind what you click…
S1E9 Cache Me If You Can
Welcome to Cache Me If You Can, the podcast where we break down the chaotic, beautiful world of distributed caching—no gatekeeping, no buzzword soup. Just real talk about scaling apps, avoiding…
Frequently Asked Questions
System Design Mastery has published 28 episodes since November 2025, covering topics in Technology.
System Design Mastery is currently dormant with new episodes daily. Average episode length is 14m.
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