Engineering notes

What we learned shipping, written down

Long-form posts from the people doing the work. No listicles, no thought leadership — just the things that cost us time so they need not cost you any.

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Engineering27 Aug 2026·9 min read

Your cache is not the problem — your invalidation is

Most teams tune TTLs when what they actually need is to know which keys a write touches. Here is the registry pattern we use on every Django project.

Hnin Ei Phyu

Engineering14 Aug 2026·7 min read

Realtime does not mean WebSockets everywhere

One socket, one group, one message type. How we make a fully cached site update instantly without turning the backend into a message bus.

Hnin Ei Phyu

Engineering23 Jul 2026·7 min read

90KB of JavaScript, or why we test on a 2015 Chromebook

A hard performance budget, enforced by testing on the worst device your users actually have. Meridian went from 14s to 2.1s time-to-interactive.

Priya Raman

Engineering7 Jul 2026·6 min read

Tauri or Electron: an 11MB answer

We shipped Lumen Cut at 11MB against a predecessor at 340MB. Here is the honest tradeoff, including where Electron still wins.

Kyaw Swar Lin

Engineering21 Jun 2026·8 min read

Postgres will tell you why it is slow, if you ask it properly

EXPLAIN ANALYZE is not the hard part. Reading it, and knowing which of the four common shapes you are looking at, is.

Hnin Ei Phyu

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