⏱ 6 min read Waymo operates a fully autonomous ride-hailing service (no human safety driver) across multiple US cities. Designing an autonomous ride-hailing platform Read article

⏱ 6 min read Staff+ (L6/L7) system design interviews evaluate a different dimension than senior (L5) interviews. At the staff level, you’re defining the Read article

⏱ 5 min read Tesla Autopilot processes data from cameras, radar, and ultrasonic sensors to navigate roads autonomously. Designing an autonomous driving system tests Read article

⏱ 6 min read Apache Kafka processes trillions of events per day at companies like LinkedIn, Netflix, Uber, and Airbnb. Designing Kafka itself — Read article

⏱ 6 min read AI-powered knowledge bases (Notion AI, Confluence AI, Glean) answer questions by searching and synthesizing information from organizational documents. Designing a Read article

⏱ 6 min read Calendly automates scheduling for millions of professionals by eliminating the back-and-forth of finding a mutual time. Designing a scheduling platform Read article

⏱ 6 min read Coinbase serves 100+ million users trading cryptocurrencies with $200+ billion in custodied assets. Designing a crypto exchange tests your understanding Read article

⏱ 6 min read GitHub Actions processes millions of workflow runs per day for millions of repositories. Designing a CI/CD platform tests your understanding Read article

⏱ 7 min read Electronic trading platforms process millions of orders per second with microsecond-level latency. Designing a trading system tests your understanding of: Read article

⏱ 6 min read WhatsApp Communities extends the messaging platform to support organizations with thousands of members: schools, neighborhoods, companies, and interest groups. Communities Read article

⏱ 6 min read Shopify powers 4+ million online stores across 175 countries, processing $200+ billion in GMV annually. Designing a multi-tenant e-commerce platform Read article