System Design Case Studies

- A widely shared social post collected 16 system design case studies for 2026 interviews covering Apple AirTags, Google Docs, Instagram at scale, WhatsApp and other practical architectures. - The thread offers concrete breakdowns and links intended to help engineers understand scalable, reliable designs across client, server and storage concerns. - The collection is being circulated as a practical reference for engineers preparing system design interviews or mapping real architectures to Apple‑style product constraints. (x.com)