Real-world system design breakdowns of the products powering everyday life — how billion-user platforms handle scale, reliability, and speed under the hood.
01Real-Time SystemsZomato/Uber Eats Rider Tracking
Study how food delivery apps track riders in real time, estimate arrival times, and provide smooth live location updates while optimizing battery and network usage.
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02Geospatial SystemsUber Driver Matching
Learn how nearby drivers are discovered and matched to riders using geospatial indexing and intelligent allocation algorithms.
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03Messaging SystemsWhatsApp Reliable Messaging
Understand offline messaging, acknowledgements, retries, message ordering, and end-to-end delivery.
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04Predictive SystemsGoogle Maps ETA Prediction
Explore how traffic, road conditions, and historical data are combined to estimate arrival times.
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05Streaming SystemsYouTube Adaptive Video Streaming
Learn how video quality automatically changes based on internet speed to avoid buffering.
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06Machine LearningNetflix Recommendation Engine
Understand recommendation systems that personalize content for every user.
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07High-Scale SystemsAmazon Flash Sale Architecture
Study how large e-commerce platforms prevent overselling and survive millions of concurrent buyers.
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08Payment SystemsRazorpay/Stripe Idempotent Payments
Learn how payment gateways prevent duplicate transactions and reconcile payment states.
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09Predictive SystemsSwiggy Delivery Time Prediction
Understand how cooking time, rider availability, and traffic combine to predict delivery time.
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10Ranking SystemsInstagram Feed Ranking
Study how social media platforms rank and load personalized feeds efficiently.
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