⏱ 5 min read Search Suggest System Design Overview Search suggest (autocomplete) is one of the most latency-sensitive features in any product. Users expect […] Read article

⏱ 5 min read Activity Stream System Design Overview An activity stream notifies users about actions taken by others in their network: likes, follows, Read article

⏱ 5 min read Timeline Service System Design Overview A timeline service collects events from multiple heterogeneous sources, imposes a consistent ordering guarantee, and Read article

⏱ 6 min read Requirements and Constraints A risk scoring service aggregates signals from multiple data sources, runs them through an ensemble of models, Read article

⏱ 6 min read Requirements and Constraints A telemetry collector receives metrics from services and infrastructure components, aggregates them locally to reduce cardinality and Read article

⏱ 6 min read Requirements and Constraints A device registry is the source of truth for IoT device identity, credentials, configuration, and metadata. It Read article

⏱ 6 min read Requirements and Constraints An IoT data pipeline ingests telemetry from potentially millions of connected devices, processes and enriches the stream, Read article

⏱ 5 min read Requirements and Constraints A shipping tracker aggregates parcel status from multiple carriers (FedEx, UPS, USPS, DHL, regional last-mile), normalizes heterogeneous Read article

⏱ 5 min read Requirements and Constraints A fulfillment service sits between order management and warehouse execution. It receives orders, decides which warehouse(s) should Read article

⏱ 7 min read Requirements and Constraints A cohort analysis system groups users by a shared characteristic or event at a point in time Read article

⏱ 7 min read Requirements and Constraints A full-featured experiment platform extends simple A/B testing to support adaptive allocation (multi-armed bandits), holdout groups, guardrail Read article

⏱ 6 min read Requirements and Constraints A compliance reporting system automates the collection, aggregation, and delivery of evidence required by regulatory frameworks such Read article

⏱ 7 min read Problem Statement and Requirements A pub/sub service enables one-to-many message delivery: publishers send messages to topics without knowing who will Read article

⏱ 7 min read Problem Statement and Requirements An event streaming platform extends a basic message broker with features required for long-lived, schema-evolving data Read article

⏱ 5 min read Requirements and Constraints A distributed cron service triggers jobs on time-based schedules (standard cron expressions) across a fleet of nodes Read article