3 min read Idempotency means that performing an operation multiple times produces the same result as performing it once. In distributed systems, network […] Read article
3 min read A Bloom filter is a space-efficient probabilistic data structure that tests whether an element is a member of a set. […] Read article
3 min read A distributed task queue decouples work producers from workers, enabling async processing, retries, scheduling, and horizontal scaling. Common use cases: […] Read article
4 min read A data pipeline moves data from operational systems (databases, event streams, APIs) to analytical systems (data warehouses, data lakes) where […] Read article
4 min read A graph database stores data as nodes (entities) and edges (relationships), enabling efficient traversal of complex, highly connected data. Social […] Read article
8 min read Two-factor authentication (2FA) requires users to present two forms of evidence: something they know (password) and something they have (phone, […] Read article
4 min read A webhook delivery system sends HTTP callbacks to external URLs when events occur in your system — Stripe sends webhook […] Read article
4 min read Event sourcing is a persistence pattern where the state of an entity is derived by replaying a sequence of immutable […] Read article
6 min read An ad click tracking system records every click on an advertisement, deduplicates fraudulent clicks, aggregates counts for billing, and provides […] Read article
6 min read A payments system processes financial transactions — charge customers, transfer funds, process refunds. Unlike typical web applications, payments demand ACID […] Read article