Josue Somarribas

UX ENGINEER × CRO DEVELOPER

I turn hesitation into
experiences that ship.

Research, interface design, front-end implementation and experimentation—from signal to measurable outcome.

View selected work ↓Discuss a project

8+ years · Spain · Working globally

User research

Uncover real user needs with clear, actionable insights.

Experiment design

Turn signals into hypotheses, test quickly and learn what matters.

Production front-end

Build accessible, performant interfaces ready to ship and scale.

Analytics & QA

Instrument clean events, validate releases and protect the learning.

Selected work

Different problems. Different roles. The same obsession with clarity.

01CLIENT WORK · CREATIVE WEB DEVELOPMENT

Andrés Tenor

A distinctive artist website for opera and bolero tenor Andrés Rodríguez, based in Barcelona.

Andrés Rodríguez tenor website homepage
Role:
Web design & development
Location:
Barcelona · Europe
Focus:
Artist identity · Performance
Visit live site
02CLIENT WORK · WEB DESIGN + DEVELOPMENT

Rofka Projects

A digital presence for a Costa Rican construction company—from planning and design to finished spaces.

Rofka Projects homepage featuring its construction portfolio
Role:
Web design & development
Platform:
Framer
Focus:
Brand presence · Responsive UI
Visit live site
03CLIENT WORK · WEB DEVELOPMENT

PitchCR

A digital home for Costa Rica's startup and pitch community.

Current homepage displayed at pitchcr.com
Role:
Design implementation
Platform:
Squarespace
Focus:
Responsive UI
Visit live site

Products & experiments

Independent tools built to test ideas, behavior and clarity.
04INDEPENDENT PRODUCT · RESEARCH + FRONT-END

5 Seconds Tester

A live tool for testing whether a value proposition is understood in five seconds.

5 Seconds Tester upload and test interface
Live productBuilt end-to-endResearch workflow
Try the tool See how I work →
05EXPERIMENT · UX ENGINEERING

Font Tester

A browser-based experiment exploring how typography changes perception and trust.

Font Tester typography controls and live preview
Interactive prototypeBehavioral comparisonFront-end build
Explore prototype

From signal to shipped experiment

How I bridge design decisions and production constraints.

01Observe
Heatmap showing low attention on a primary action

Observe

Heatmap shows low engagement on primary CTA above the fold.

02Frame
A question reframed as a testable decision

Frame

Hypothesis: Clarifying the CTA label will increase clicks.

Decision: Test clearer, benefit-led CTA copy.

03Prototype
Accessible A and B component variants

Prototype

Accessible component variants for A/B test. WCAG AA · Keyboard focus visible.

04Instrument
Event tracking code for the CTA experiment

Instrument & ship

Track event and ship behind experiment flag. Analytics event in place before ship.

05Learn
Experiment quality assurance checklist

Learn

Analyze behavior by variant and segment. Decide what to keep, iterate or drop.

Josue bridges design decisions and
production constraints exceptionally well.Product collaborator · Enterprise project
Read 14 recommendations

Have a stubborn
product problem?

Send me the messy version. No pitch deck required.

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Based in Spain · CET · English + Spanish