📐 System Design Blueprints

Architectural deep-dives built from first principles — real systems, real trade-offs, production-level detail.

16 Weeks
92 Blueprints
11 Free
81 Premium
Your progress
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🧱 Week 1
Week 1
6 blueprints
6 posts
  1. 01 Build a Distributed Code Execution Runtime ✓ Free ✓
  2. 02 Build a Feature Flag Service ✓ Free ✓
  3. 03 Build a Blue-Green Deployment System ★ Premium ★
  4. 04 Build a CI/CD Pipeline Orchestrator ★ Premium ★
  5. 05 Build a Distributed Cron Job Scheduler ★ Premium ★
  6. 06 Build a Distributed Tracing System ★ Premium ★
📈 Week 2
Week 2
6 blueprints
6 posts
  1. 01 Build a Real-Time Log Aggregation Pipeline ★ Premium ★
  2. 02 Build a Secrets Management Vault ★ Premium ★
  3. 03 Build a Distributed Unique ID Generator ✓ Free ✓
  4. 04 Build Google Docs Real-Time Collaborative Editing ★ Premium ★
  5. 05 Build Google Drive's File Sync Engine ★ Premium ★
  6. 06 Build Google Maps ETA Prediction Under Live Traffic ✓ Free ✓
🗄️ Week 3
Week 3
6 blueprints
6 posts
  1. 01 Build Google Photos Duplicate Detection Pipeline ★ Premium ★
  2. 02 Build Google Search Autocomplete ★ Premium ★
  3. 03 Build a QR Code Generation and Analytics Service ✓ Free ✓
  4. 04 Build TinyURL - A URL Shortener at Scale ★ Premium ★
  5. 05 Build a Concurrent Device Session Manager ★ Premium ★
  6. 06 Build Facebook Live Low-Latency Video Streaming ★ Premium ★
🔌 Week 4
Week 4
6 blueprints
6 posts
  1. 01 Build Facebook News Feed Ranking and Fanout ★ Premium ★
  2. 02 Build Gmail's Spam Detection Pipeline ★ Premium ★
  3. 03 Build Instagram Explore Real-Time Recommendation Engine ★ Premium ★
  4. 04 Build Instagram Stories Expiry and Archival Pipeline ✓ Free ✓
  5. 05 Build Meta's Notification Delivery System ★ Premium ★
  6. 06 Build Netflix Adaptive Bitrate Streaming Engine ✓ Free ✓
⚡ Week 5
Week 5
6 blueprints
6 posts
  1. 01 Build Netflix's Content Delivery Network ★ Premium ★
  2. 02 Build Netflix's Recommendation Engine ★ Premium ★
  3. 03 Build Uber's Real-Time Driver-Rider Matching System ✓ Free ✓
  4. 04 Build Uber's Surge Pricing Engine ✓ Free ✓
  5. 05 Build a Video Transcoding Pipeline ✓ Free ✓
  6. 06 Build WhatsApp Message Delivery with Offline Queuing ★ Premium ★
🔐 Week 6
Week 6
6 blueprints
6 posts
  1. 01 Build a Geospatial Proximity Service ★ Premium ★
  2. 02 Build a Social Graph Service at 500M Users ✓ Free ✓
  3. 03 Build Twitter's At-Mention Fan-Out for Celebrities ★ Premium ★
  4. 04 Build Twitter's Trending Topics Pipeline ★ Premium ★
  5. 05 Build Amazon's Product Search Ranking ★ Premium ★
  6. 06 Build a Flash Sale System for 500K Concurrent Checkouts ★ Premium ★
🤖 Week 7
Week 7
6 blueprints
6 posts
  1. 01 Build Amazon's Review Aggregation Pipeline ★ Premium ★
  2. 02 Build a Distributed Shopping Cart with Guest Session Merge ★ Premium ★
  3. 03 Build a Payment Processing System with Idempotency Guarantees ★ Premium ★
  4. 04 Build a Real-Time Fraud Detection Engine ★ Premium ★
  5. 05 Build Slack's Channel Message Fan-Out and Unread Counts ★ Premium ★
  6. 06 Build a Wallet Ledger System at Scale ★ Premium ★
🌐 Week 8
Week 8
6 blueprints
6 posts
  1. 01 Build an AI Agent Task Queue with Resumability ★ Premium ★
  2. 02 Build an Event Sourcing and CQRS Audit Trail ★ Premium ★
  3. 03 Build a Push Notification Routing System ★ Premium ★
  4. 04 Build a RAG Pipeline for an Enterprise Knowledge Base ★ Premium ★
  5. 05 Build a Real-Time Analytics Dashboard at 100B Events ★ Premium ★
  6. 06 Build a Time-Series Metrics Store ★ Premium ★
🛠️ Week 9
Week 9
6 blueprints
6 posts
  1. 01 Build a Vector Search Engine ★ Premium ★
  2. 02 Build a WebSocket-Based Presence System ★ Premium ★
  3. 03 Build a Chaos Engineering Platform ★ Premium ★
  4. 04 Build a Distributed Key-Value Store ★ Premium ★
  5. 05 Build a Distributed Lock Manager and Leader Election Service ★ Premium ★
  6. 06 Build a Distributed Rate Limiter Across 100+ API Gateway Nodes ★ Premium ★
🚀 Week 10
Week 10
6 blueprints
6 posts
  1. 01 Build an Infrastructure Cost Attribution System ★ Premium ★
  2. 02 Build a Multi-Region Config Management System ★ Premium ★
  3. 03 Build a Self-Healing Service Mesh ★ Premium ★
  4. 04 Build a Shadow Traffic / Dark Launch System ★ Premium ★
  5. 05 Build a Change Data Capture Pipeline ★ Premium ★
  6. 06 Build a Columnar Storage Engine with SSTable and Compaction ★ Premium ★
🔍 Week 11
Week 11
6 blueprints
6 posts
  1. 01 Build a Distributed Write-Ahead Log ★ Premium ★
  2. 02 Build a Hot-Cold Tiered Storage System ★ Premium ★
  3. 03 Build a Multi-Tenant Database System ★ Premium ★
  4. 04 Build a Schema Registry for Event-Driven Systems ★ Premium ★
  5. 05 Build Faceted Search with Live Inventory Filters ★ Premium ★
  6. 06 Build an Inverted Index for Full-Text Search at 10B Documents ★ Premium ★
🏗️ Week 12
Week 12
6 blueprints
6 posts
  1. 01 Build a Personalized Typeahead Search Engine ★ Premium ★
  2. 02 Build a Semantic Search Engine with Hybrid Ranking ★ Premium ★
  3. 03 Build a Content Moderation Pipeline ★ Premium ★
  4. 04 Build a Podcast Transcription and Chapter Detection Pipeline ★ Premium ★
  5. 05 Build Spotify's Song Radio Feature ★ Premium ★
  6. 06 Build YouTube's View Count System ★ Premium ★
📊 Week 13
Week 13
6 blueprints
6 posts
  1. 01 Build a Live Leaderboard for a 10M-Player Tournament ★ Premium ★
  2. 02 Build a Real-Time Multiplayer Game State Sync System ★ Premium ★
  3. 03 Build a Distributed Session Store for 50M Active Sessions ★ Premium ★
  4. 04 Build an OAuth 2.0 Authorization Server ★ Premium ★
  5. 05 Build a DRM Token Vending System for Premium Video ★ Premium ★
  6. 06 Build Pinterest's Image Deduplication System ★ Premium ★
🛡️ Week 14
Week 14
6 blueprints
6 posts
  1. 01 Build a Game Matchmaking System ★ Premium ★
  2. 02 Build a Game Replay Storage and Scrubbing System ★ Premium ★
  3. 03 Build a Bot Detection System Using Behavioral Signals ★ Premium ★
  4. 04 Build a Certificate Authority and Automated TLS Cert Rotation ★ Premium ★
  5. 05 Build an API Key Management System ★ Premium ★
  6. 06 Build Amazon's Warehouse Picking Route Optimizer ★ Premium ★
🌊 Week 15
Week 15
6 blueprints
6 posts
  1. 01 Build a Distributed Inventory Reservation System ★ Premium ★
  2. 02 Build a Last-Mile Delivery Tracking System ★ Premium ★
  3. 03 Build Reddit's Post Ranking Algorithm ★ Premium ★
  4. 04 Build a Ride-Pooling Matching Engine ★ Premium ★
  5. 05 Build a Follow Recommendation Engine Using Graph Traversal ★ Premium ★
  6. 06 Build a Live Poll and Real-Time Vote Tally System ★ Premium ★
🧱 Week 16
Week 16
2 blueprints
2 posts
  1. 01 Build a Comment Threading System with Infinite Nesting ★ Premium ★
  2. 02 Build a Social Media Hashtag Trending System by Region ★ Premium ★