Section 01
Core Backend Systems
0 / 5
Premium
URL Shortener
Premium
Notification Platform
Premium
Distributed Rate Limiter
Premium
Dropbox
Section Challenge
Premium
Section 02
Consumer Systems at Scale
0 / 5
Premium
Twitter/X Feed
Premium
Premium
YouTube
Premium
Netflix
Section Challenge
Premium
Uber
Section 03
High-Integrity Platforms
0 / 4
Premium
Ticketmaster
Premium
Stripe
Premium
Slack
Premium
Google Drive
Section 04
Search & Platform Services
0 / 5
Premium
Search Autocomplete
Premium
Full-Text Search
Premium
Collaborative Editor
Premium
Webhook Platform
Section Challenge
Premium
Distributed Scheduler
Section 05
Infrastructure Systems
0 / 6
Premium
Metrics Platform
Premium
Logging Platform
Premium
Feature Flag Platform
Premium
Distributed Cache
Section Challenge
Premium