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. 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
6 min read This is the definitive guide to preparing for technical interviews at top tech companies. Whether you have 1 month or Read article
6 min read Booking.com connects 28+ million accommodation listings with hundreds of millions of travelers. Designing an online travel agency (OTA) tests your Read article
6 min read Splitwise tracks shared expenses among friends, roommates, and travel groups — helping millions of users settle debts fairly. Designing an Read article
7 min read GitHub Copilot and similar AI code assistants (Cursor, Codeium, Amazon CodeWhisperer) generate code suggestions in real-time as developers type. Designing Read article
7 min read SQL is tested at virtually every backend, data engineering, and data science interview. Beyond basic SELECT statements, interviewers test: window Read article
7 min read C++ remains essential for systems programming, game engines, high-frequency trading, embedded systems, and performance-critical applications. C++ interviews at companies like Read article
6 min read Enterprise search powers knowledge discovery within organizations — searching across documents, messages, code, and wikis. Unlike web search (rank by Read article
7 min read Rust is the language of systems programming, WebAssembly, and performance-critical applications. Used at AWS (Firecracker), Cloudflare (Workers), Discord, and Dropbox. Read article
6 min read Go is the language of cloud infrastructure — powering Kubernetes, Docker, Terraform, and most modern backend services at companies like Read article
7 min read JavaScript is the language of the web, powering frontend (React, Vue), backend (Node.js, Deno, Bun), and full-stack applications. TypeScript has Read article
