8 min read Synonym Expansion System: Overview Synonym expansion augments search queries with equivalent or related terms so that a search for “automobile” […] Read article
11 min read Document Store System: Overview A document store persists and retrieves arbitrary JSON documents. Unlike relational databases, it does not enforce Read article
12 min read Key-Value Store System: Overview A key-value store is the simplest distributed database: keys map to opaque binary values. Despite its Read article
8 min read Proximity Search System: Overview A proximity search system finds entities (restaurants, drivers, users) within a geographic radius of a query Read article
9 min read Typeahead Autocomplete System: Overview A typeahead (autocomplete) system returns ranked query completions as the user types, with latency under 50ms Read article
9 min read Spell Checker System: Overview A spell checker takes an input word (potentially misspelled) and returns a ranked list of correction Read article
8 min read User Activity Feed: Overview A user activity feed aggregates events from actors a user follows and surfaces them in reverse-chronological Read article
7 min read Recommendation Feedback Loop: Overview A recommendation system without a feedback loop becomes stale. The feedback loop closes the cycle: collect Read article
8 min read Graph Search System: Overview A graph search system enables queries over a network of nodes and edges — users, connections, Read article
8 min read What Is an ML Feature Store? An ML feature store is a centralized system for computing, storing, versioning, and serving Read article
8 min read Why Model Serving Is Not Trivial Deploying a model to production is an engineering discipline separate from training one. A Read article
9 min read Why a Dedicated Experiment Platform? A/B testing sounds simple — split users, measure a metric, run a t-test — but Read article
8 min read A secrets management system stores, distributes, and rotates sensitive credentials — database passwords, API keys, TLS certificates, and cloud credentials Read article
8 min read An audit logging system records every significant action in a platform — who did what to which resource, when, and Read article
9 min read A health check service continuously probes every service in a platform, aggregates results through a dependency graph, classifies health states, Read article
