Backend & APIs

9+ min ago   (205+ words) At twenty past eleven on a Tuesday in June our order database stopped accepting writes. Reads worked. Every insert, update and delete failed with database is not accepting commands to avoid wraparound data loss. Autovacuum had been running anti wraparound…...

10+ min ago   (212+ words) We pay our suppliers through a payment provider's payouts API. Every payout request carries an idempotency key built from our payout id, so that if we send the same request twice the provider recognises it and returns the original result…...

5+ min ago   (79+ words) The naive 'N failures and this account is locked' turns your brute-force defense into a denial-of-service tool. The fix is one decision: what you key on. Tagged with security, redis, java, webdev. Liquid syntax error: Unknown tag 'endraw' Templates let…...

22+ hour, 53+ min ago   (510+ words) Caching in Node.js usually forces a frustrating compromise. You either stick with a basic in-memory Map (or LRU-cache) that risks running your process out of memory (OOM) under heavy loads, or you accept the network latency floor and serialization…...

5+ min ago   (1213+ words) On February 17, 2026, Apache Kafka 4.2 shipped with this line in the release announcement: "Kafka Queues (Share Groups) is now production-ready." That sentence quietly reopens one of backend engineering's oldest arguments. For years, "should my job queue be Postgres or Kafka?" had…...

13+ min ago   (563+ words) Most people who need job-posting data reach for a headless browser. They point Playwright at a careers page, hope the React app has hydrated, and write selectors that will break the next time marketing ships a redesign. You usually don't…...

11+ min ago   (207+ words) When building real-time clinical AI systems and temporal digital twin simulators, latency and resilience are not just performance metrics—they are hard reliability requirements. Every clinical evaluation or simulation needs sub-millisecond repeatability, but cloud network hiccups or unprovisioned tables should…...

22+ min ago   (1093+ words) I built drobek with a specific boundary: the agent writes the browser app, while backend modules run on the drobek server. A proxy module can attach an API key without putting that key in the generated JavaScript. The agent can…...

2+ week, 59+ min ago   (82+ words) I recall when my team studied Microsoft COM technologies in the late 1990s. At first, the complexity was overwhelming, but once our team lead explained the concepts in simple terms, everything became clear. Similarly, token-based security can be explained with a…...

22+ min ago   (700+ words) Originally published on Code Beneath. Keep-alive solves this by keeping the TCP connection open after the response. The next request reuses the same socket, skipping the handshake. Connection pooling takes this further: instead of sharing a single connection (which becomes…...