How Twitter and LinkedIn Refresh Your Feed Without You Noticing
Twitter and LinkedIn don't really refresh your feed. The client quietly checks for updates, buffers new posts off-screen, and shows a "New p...
Oct 4, 2026
6 min
From 3,800ms to 1.2ms: Optimizing Dynamic OpenGraph Image Generation in Next.js
Dynamic OpenGraph images power social cards on Twitter, LinkedIn, and Discord, but generating 1200x630 PNGs on-the-fly with Satori and remot...
Sep 30, 2026
11 min
Building a Production Remote MCP Server in NestJS: Connecting Claude Desktop and Cursor to Your SaaS
Learn how to build a production-grade Remote Model Context Protocol (MCP) server in NestJS over HTTP with Bearer authentication, JSON-RPC 2....
Sep 29, 2026
10 min
Hardening the Edge: Defeating SSRF, Redirect Traps, and Compression Bombs in Next.js Dynamic OpenGraph Generators
Passing user-supplied avatar URLs to @vercel/og turns your Next.js Edge runtime into an arbitrary outbound proxy. Learn how to defeat SSRF, ...
Sep 28, 2026
10 min
You Probably Don't Need Elasticsearch: Building a Fast, Typo-Tolerant Search Engine in PostgreSQL
Every engineering team hits the same milestone: your application grows past a few tens of thousands of records, users complain that basic da...
Sep 28, 2026
10 min
How Netflix and Uber Build Event Driven Systems at Scale
A practical look at how Netflix and Uber run event-driven systems at huge scale: isolating failures, choosing delivery guarantees, and plann...
Sep 21, 2026
11 min
The Harness is the Moat: Building a Deterministic Agent Runtime with Context Pruning
Learn how a deterministic harness prunes context, uses a ledger and transactional tool calls to keep LLM agents reliable over many turns.
Sep 16, 2026
6 min
The Hidden Cost of “Just Add a Setting”
“Can we just add a setting for this?” It sounds harmless. Suppose an office should be able to choose its default appointment duration. The f...
Sep 9, 2026
15 min
Stop Creating an Endpoint for Every Button
There is a pattern that feels completely natural when building an API. The frontend gets an Approve button, so the backend gets an endpoint:...
Sep 7, 2026
9 min