Osa's notes

Things I am figuring out.

A small archive of technical deep dives, product lessons, and the occasional detour.

Latest notes

7 posts
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7 min read

Image optimization and caching on Astro and Vercel

What I changed so the images on my personal site show up straight away instead of as blank tiles: build-time imports, resizing, modern formats, loading hints and the cache headers underneath.

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14 min read

Your coding agent should open the browser before it says it’s done

Why browser review belongs in the definition of done for frontend work, and how that idea turned into katalepsis.

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7 min read

The Invisible Force: A Visual History of Blood Pressure

From a clergyman's horse experiment in 1733 to the digital cuff on your wrist: how humanity learned to measure the pressure of life itself.

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15 min read

How to Build a PostgreSQL Backed Job Queue in Go

Learn how Go and PostgreSQL power a production-grade background job queue, covering goroutines, contexts, row locks, LISTEN/NOTIFY, and advisory locks.

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6 min read

Demystify Queues and Their Real-World Applications

Learn about queues by building an app that remembers...

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4 min read

Animating SVGs with Framer Motion - a TO loading SVG Case Study

Learn how I animated my loading state SVG

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1 min read

First post (Calvary Greetings!)

First ever post, why this blog etc