Engineering notes
Articles for people who
ship the stack
Rewrites on React, Node.js, TypeScript and AI. A translated body is shown when it exists. If it does not, you see the English text and a note that says so.
Tagged: Scalability
How Many Requests Can a Node.js Server Really Handle?
How many requests can a Node.js server really handle? Express load tests on Heroku and AWS against Django, a 40K rps capacity estimate, and what slows APIs.
6 min readStateless MCP: Scaling Servers Without Sessions or Handshakes
How a stateless Model Context Protocol drops sessions and handshakes, and how _meta, multi-round requests, routing headers, caching and tasks keep it usable.
9 min readBackend System Design by Bottleneck: From URL Shortener to E-Commerce
A requirements-first way to design Node.js backends: when to add load balancers, Redis, replicas, queues and rate limits, and what each one costs you.
13 min read
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