Open to opportunities · Denver / remote

I build the UI system marketing ships from.

Front-end Engineer · UI/UX Designer · CRO Specialist

Senior front-end engineer and UI/UX designer with 20+ years turning campaign work into shared tokens, components, and patterns—then measuring what they do to signup.

David N Allen — senior front-end engineer and UI/UX designer, Denver CO
0+
Years Experience
0+
Projects Shipped
CRO
Focus
DEN
Based In

Patterns in production

Comparison, pricing, and a sales page assembled from reusable parts. These are patterns a team can ship again.

Principles

The system exists so marketing can launch without reinventing the interface, and so the work can be measured.

01
One source of truth
Tokens and components are the source. Screens are assembled from them, so quality holds when the calendar compresses.
02
Built to be reused
A pricing module or offer table is a pattern the next campaign drops in, so the launch starts from a part the team already knows.
03
Scored on conversion
Visual consistency serves signup, leads, and revenue. Experiments show which part of the system to change next.

How a launch runs

Tokens
Color, type, space, and motion live in one file. A page does not invent its own blue.
Components
Buttons, cards, fields, titles, and info rows are named and shared. Change one and every screen that uses it follows.
Patterns
Pricing comparisons, offer tables, and landing sections are assembled from those components, so the next campaign starts from a pattern.
Experiments
The system is scored on leads and conversion. A test changes a component or a pattern, and the result carries forward.

Experience snapshot

2021 – present
CRO & UI/UX Specialist
Simpler Trading

Own the UI system behind high-traffic registration and marketing pages: shared modules, campaign patterns, and experiments that drive engagement and leads.

2017 – 2021
Lead UI/UX Designer
Leading Response

Led design and development for marketing products. Built testing frameworks and data-driven UX strategy to improve campaign and product performance.

Tools I use daily

Adobe logo
VS Code logo
Grok logo
React logo
NPM logo
JavaScript logo
Google Analytics
Git
© 2026 David N Allen. All rights reserved.
Developed with React Developed with Next.js