WRITING · NOTES FROM THE WORK
Things I’m learning,
building and
questioning.
Field notes on UX, experimentation, front-end craft and the messy thinking behind better digital products.
Written by Josue Somarribas · Costa Rica → Spain
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A selection that shows how I think and work.The Cost of FOUC: How Flicker Kills A/B Test Validity
When users see the control for 300ms before your variant snaps in, your data is contaminated. Why flicker is a validity bug and how to fix it properly.
JSON-LD for Case Studies: Schema for UX Portfolios
Schema.org has no CaseStudy type, so what should a UX portfolio use? A working JSON-LD recipe for case studies, with the honest limits of what schema buys.
The Squircle in Mobile CRO: Superellipses and Friction
Squircles are everywhere in mobile UI, but do smoother corners reduce friction in buttons? What the geometry can and cannot promise for conversion.
Latest notes
Field notes, practical guides and lessons from the work.
ElevenLabs for Developers: Advanced SSML Narration Hacks
Break tags, phoneme control, pronunciation dictionaries, and the model support matrix: the developer layer of ElevenLabs for narration that scales.
MutationObservers vs Polling: A Shootout for A/B Testing
Polling is simple, MutationObservers are fast. A practical comparison of both element-detection strategies for experimentation code, with benchmark data.
Statistical Significance for Skeptics: When Flat Wins
Most A/B tests come back flat, and most teams read that as failure. What a flat result actually tells you, and the cases where it is the win itself.
Designing for Attention Degradation: UX in the Real World
Your users hold a bag, squint at glare, and ride a 3G connection. A guide to designing for situational impairments instead of ideal lab conditions.
Framer Localization Workflow: Hreflang & Multi-Language CMS
What Framer's localization automates, what it leaves to you, and how to run a bilingual CMS without breaking international SEO. Notes from a real site.
The ROI of AI Search Mentions: Valuing Zero-Click Awareness
AI assistants mention your brand without sending a click. A practical framework to estimate what those zero-click mentions are worth, with real data.
The New Analytics Problem: When AI Mentions You but Nobody Clicks
AI search can mention your brand without sending traffic. Here is why that breaks normal analytics and how to think about measurement differently.