Notes & tutorials

Row-level security, schema isolation, or database-per-tenant? Working examples of each, and how to pick before it's expensive to change.

The stack and the handful of decisions I make before writing a line of a new SaaS, plus the ones I deliberately postpone.

A cleaner way to get tmux onto a Synology NAS than my first attempt. Fewer steps, survives updates.

Context managers without the mystery: what `with` really does, and when `async with` earns its keep.

What it takes to scrape millions of pages a day: the architecture, the anti-bot arms race, and the failures that taught me each part.

Notes from a Hacker News thread worth keeping: how experienced engineers actually land their next role.

Wrote some messy code two years ago. Recently, a contractor contacted me for updates, but after I gave a high quote, they hired another dev. Turns out, the new engineer couldn’t fix my old code either! Now, I’m back staring at the spaghetti I wrote years ago, laughing and regretting it at the same time. Lesson learned always write clean, maintainable code!

Synology's locked-down shell makes even installing tmux a small adventure. Here's the Entware route that worked for me.

Designing pipelines that survive millions of events per second, and the decisions that only start to matter at that volume.