8 min read A bookmark (save) system lets users collect and organize content they want to revisit — articles, products, listings, posts. Core […] Read article
9 min read A poll system lets users create questions with multiple choice answers, vote on them, and see real-time results. Used in […] Read article
9 min read A content reporting and abuse detection system allows users to flag harmful content — spam, harassment, hate speech, illegal material […] Read article
10 min read A content tagging system lets users and systems attach descriptive labels to content — blog posts, products, images, videos — […] Read article
9 min read A data archival system moves aged, infrequently accessed data from hot storage (fast, expensive) to warm or cold tiers (slower, […] Read article
9 min read An audit trail is an append-only log of every action taken on sensitive resources — who changed what, when, and […] Read article
10 min read A file deduplication system eliminates redundant storage by detecting files with identical content and storing each unique payload exactly once. […] Read article
7 min read An invitation system lets existing users invite new users via unique links or codes, tracking who invited whom and rewarding […] Read article
8 min read A WebSocket server maintains persistent bidirectional connections between clients and servers, enabling real-time push without polling. The challenge is not […] Read article
7 min read The inbox pattern is the receiving counterpart to the outbox pattern. Where the outbox ensures a service reliably publishes events […] Read article