S Technologies Engineering
How Ulkaa Is Built
Design notes, trade-offs and the bugs that taught us something, written by the people who build the platform.
Guides
How Ulkaa Personalises The Feed Cheaply
Language as a soft prior, a topic tree derived from hashtags, Not interested as a training label, and exploration sized from research: a personalised feed that fits a small server, with every costly tier behind its own switch.
24 min read
How Ulkaa Ranks The Home Feed
From a bounded candidate query to a signed cursor: how the home feed picks, scores, orders and pages posts, and what happens when any part of it fails.
15 min read