Architecture & System Design | Daniel Greener-Vigil

System design and software architecture, written from real experience leading engineering teams.

July 10, 2026· 7 min read

Designing a Rate Limiter: Token Bucket vs. Sliding Window

A rate limiter is a small piece of state and a simple rule, but the algorithm you pick and where that state lives determines whether it actually works once you have more than one server.

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Architecture & System Design

May 8, 2026· 10 min read

The SOLID Principles, Explained With Code You'll Actually Write

SOLID gets taught as five abstract rules and forgotten just as fast. Here they are with concrete, boring, realistic code — the kind you'd actually review in a pull request.

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Architecture & System Design

March 6, 2026· 5 min read

Monolith vs. Microservices: What I'd Actually Choose as a Tech Lead

Monolith vs. microservices isn't a technology choice, it's an organizational one. A practical decision framework from someone who has led both kinds of migrations.

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