Engineering
Stop Reaching for any: Narrowing unknown in TypeScript
Why unknown is the type-safe replacement for any, and the narrowing patterns that make it practical in real code.
·4 min read
Tags
TypeScript
67 articles · Page 1 of 6
Backend
Idempotency Keys in Practice: Making Retries Safe
How to design and implement idempotency keys so retried requests never double-charge, double-send, or double-create resources.
·5 min read
Engineering
Cancellation Patterns in TypeScript: Taming AbortController
Why most async TypeScript code ignores cancellation entirely, and how to build composable, leak-free cancellation with AbortController.
·4 min read
Engineering
Template Literal Types: Expressive, Type-Safe APIs
Use TypeScript template literal types to encode event names, route patterns and permission sets in the type system — no runtime checks, no string drift.
·4 min read
Architecture
Evolving Event Schemas Without Breaking Consumers
How to add fields, rename properties, and restructure events in async systems without coordinating deployments or silently breaking downstream consumers.
·4 min read
Backend
Request Coalescing: Stopping the Thundering Herd
When a cache entry expires under load, dozens of requests race to rebuild it — inflight deduplication collapses that stampede into one upstream call.
·4 min read
Backend
Full-Text Search in Postgres, Without Elasticsearch
Postgres has a powerful built-in full-text search engine using tsvector, tsquery, and GIN indexes — no Elasticsearch cluster required for most applications.
·4 min read
Backend
Streaming Large Datasets in Node.js with Backpressure
Stop loading entire result sets into memory: how Node.js streams and async generators let you process millions of records without blowing the heap.
·4 min read
Backend
Distributed Locks: Coordinating Work Across Multiple Nodes
Stop racing conditions in distributed systems: a practical guide to implementing distributed locks with Redis and PostgreSQL advisory locks in Node.js.
·5 min read
Engineering
TypeScript satisfies: Type Safety Without Losing Inference
The satisfies operator validates that a value matches a type while preserving literal inference — why that distinction matters and where to apply it.
·4 min read
Backend
Type-Safe Event Emitters in TypeScript
Replace Node's stringly-typed EventEmitter with a generic typed alternative that catches event name typos and payload mismatches at compile time.
·4 min read
Backend
Durable Execution: Workflows That Survive Restarts
Why job queues and database state machines break on complex multi-step processes, and how durable execution with Temporal survives crashes and deployments.
·5 min read