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The Problem Every Node.js rate limiting solution I tried had the same issue — Redis in the hot path. Request comes in → middleware → netwo
Diving into Go has been incredibly refreshing. Coming into it, you might expect a powerful language to come bogged down with complex syntax. Instead,
A retrospective on toykv — a single-node, in-memory key-value store with append-only-file persistence, RESP2-compatible on the wire, three binaries,
3614. Process String with Special Operations II Difficulty: Hard Topics: Senior Staff, String, Simulation, Weekly Contest 458 You are given a strin
Introduction In the world of Go programming, the struct{}—an empty struct—stands out as a curious anomaly. It occupies zero bytes of memo
I recently shipped SnapShelf, a transparent always-on-top "staging shelf" for Windows; you fling files at the right edge of your screen, it slides in,
A while back I ripped a regex out of my SQL parser and replaced it with twenty lines of hand-written string scanning. Then I got nervous. Hand-rolling
A store feels slow. Someone has installed forty extensions over three years. The usual advice is "disable them one at a time and see what helps." That
A founder told me last year: "We need admin features shipped by Friday. Can we just hardcode the roles for now?" That was 7 months ago. They're st
I make a lot of design decisions on gut feeling. Is this the right way to structure MCP tools? Should the transport be remote or local? How much conte
You've built a checkout reactor that reserves inventory, charges a card, generates a shipping label, and sends a confirmation email. It runs through S
Every Rails app that takes Stripe webhooks has some version of this controller: def create payload = request.body.read sig_header = request.
I love Ruby. It is the language that made me happy to write code. But as a Rails developer, I eventually hit a wall. Maybe I needed to process a 2GB C
Every SaaS project I've started begins the same way: wire up Devise, figure out JWT, build Stripe service objects, set up i18n, configure Docker, writ
Every Rails project has at least one of these. A model with an old column that's probably not used anymore. "Probably" is the scary part. If something
If you've ever investigated a slow Rails endpoint, chances are you've encountered one of the most common performance problems in the Rails ecosystem:
I Have Written Ruby for Years and Just Discovered Enumerator#feed June 15, 2026 Ruby is full of delightful surprises. Even after years of writing
Hey everyone! The official coding period for Google Summer of Code (GSoC) has begun, and I am thrilled to share that my very first Pull Request (PR) f
Data observability platforms are the layer between "we test the data" and "we trust the data," and the four names every buyer hears in 2026 — Monte Ca
How I Built an AI Email Triage Agent That Creates Linear Issues and Fires Slack Alerts Most engineering teams I talk to have the same probl