UI/UX · AI Design Systems · Santiago, Chile

Designing systems that feel human — even when they're powered by AI.

I'm Ignacio Arias — better known as Nachitz — a Product Design leader working at the intersection of product strategy, user experience, and execution. Nearly three decades of shipped work for global brands — with AI woven into how I design, not just what I design.

Design Systems AI Interaction Patterns User Flows Prototyping Product Strategy

About

Clarity at the edge of new technology.

For more than 27 years I've designed digital products end to end, from research and flows to polished, scalable design systems, for brands like Google, American Express and Sony, fintech products across the world, and startups of every size. My recent focus is the messy, fascinating space where AI meets interface: designing patterns for generative features, agents and conversational flows.

I partner with product, engineering and business teams to solve complex problems, balancing user needs, business goals and technical constraints. I believe a good system is invisible: teams ship faster, products feel coherent, and users never have to think about why something works.

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Method

Clarity first. Systems always.
AI wherever it accelerates.

Map the real problem

Every project starts with questions, not screens: research, user flows and information architecture that expose where the risk actually lives. The start is the cheapest moment to be wrong, so I spend it deliberately.

Design the system, not the screen

Foundations before features: tokens, components and interaction patterns that scale. The first screen is expensive; the system makes every screen after it faster, more consistent and easier to ship.

Put AI inside the workflow

AI is embedded in my process, not bolted on. I use it to synthesize research, pressure-test flows and turn static mocks into working, coded prototypes in hours instead of weeks, so teams react to something real and decisions land earlier.

Ship shoulder-to-shoulder

Design isn't done at handoff. I map components to code, review implementation and QA the edge states alongside engineers, so what reaches users is what we designed, down to the last interaction.

Put it in front of people

Before a line of production code, real users see a prototype that feels finished. Watching five people struggle teaches more than fifty opinions in a meeting. It's the cheapest iteration loop there is.

Ship is the start, not the finish

Launches begin the learning. I track how designs perform against the metrics they were meant to move: conversion, task success, support tickets. What we learn folds back into the system, so the next release starts ahead.

Experience

2022 — Present

Senior Product Designer

DEUNA

Leading design for payment and checkout experiences at one of Latin America's fastest-growing fintechs, where every removed step shows up directly in conversion. I own the design system that keeps a multi-product platform coherent across markets, define interaction patterns for AI-driven flows, and work day to day with product and engineering to take features from ambiguous idea to shipped, measured reality.

2019 — 2022

Sr. Product Designer / UI Lead

The Bridge Social

Led UI for financial apps serving clients around the world: from first concept, research and flows through to polished, shipped product. Set the visual direction and quality bar across projects, and built the reusable component foundations that let parallel client work move fast without drifting apart.

2012 — 2019

Senior Designer

Expedia

Seven years as a remote UI/UX collaborator on Expedia.com.au, designing product enhancements and campaign experiences for one of the world's largest travel platforms. Working async across time zones inside a mature, large-scale design organization taught me the discipline behind systems that hundreds of people build on.

2011 — 2021

Freelance Creative / Art Director

Nachitz

A decade of independent work running alongside the roles above: creative direction and product design for corporates and startups through agencies like JESS3, Copypress, REDO Digital, Globant and Isobar. From brand-led campaign sites to product UI, it's where I learned to adapt fast to new industries, stacks and teams.

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Brands

Work that's reached users of global brands.

Product roles, agency partnerships and direct consulting have put my design in front of users at some of the world's most recognizable companies, across fintech, travel, entertainment, consumer goods and telecom.

Contact

Let's build something coherent.

Fluent in English, Spanish and Figma — and yes, a real human reads this inbox.

nachitz@gmail.com

Built by hand, as claimed: three files, two typefaces, zero frameworks. Vanilla JS and CSS, WCAG-AA contrast in both themes, English and Spanish served from one dictionary, and a cursor made of the logo. The source is the case study: right-click, choose “View Page Source”, and read it.