Jay Farfán.
Process + AI

Before designing, I need to understand which problem we’re solving.

Before moving into digital product design, I worked for several years as a Civil Engineer. That experience shaped three ways of working: thinking about how a system connects, designing within real constraints and paying attention to how people use it.

Today I apply them to design: I organize information and flows, prioritize feasible solutions with engineering and consider the context of use and accessibility from the start.

Double diamond

How I design, stage by stage

I use the double diamond as a reference, not a recipe. What matters to me is separating two moments: understanding the problem well, and then exploring how to solve it.

01 · Open the problem

Understand

I start by talking to users, reviewing data and understanding how the product works today. I also need to know the business and technology constraints before proposing a solution.

Where I use AI

Claude helps me organize interviews, spot recurring themes and prepare syntheses. Then I review the findings and go back to the sources before turning them into decisions.

What I decide

What to research, who to talk to and which signals really matter.

02 · Close the problem

Focus

With enough information, I turn what I learned into a concrete problem. I prioritize what to solve now, what to leave out and how we will know if the solution works.

Where I use AI

I use it to compare patterns, organize scenarios and explore different ways of structuring information.

What I decide

The priority, the scope and what really goes into the first version.

03 · Open the solution

Explore

I try different ways of solving the problem before committing to one. I work with flows, wireframes and prototypes until I find a direction that makes sense for users and the team.

Where I use AI

I use Claude Design and ChatGPT Sites to test ideas quickly and Lookback Eureka AI to speed up the review of testing sessions.

What I decide

Which ideas are worth testing, with whom, and when we have enough evidence to move forward.

04 · Close the solution

Build

Once the direction is clear, I work with engineering to turn it into product: states, edge cases, responsive behavior and the details that appear when a screen stops being a prototype.

Where I use AI

Claude Design and ChatGPT Sites help me build functional prototypes and websites closer to the real product.

What I decide

What gets specified, what can be simplified and when a technical constraint means the design needs another look.

How I use AI

I use AI to move faster, not to let it decide for me.

I use it to organize research, explore alternatives, summarize information and build prototypes faster. But I don’t take an AI result as evidence: I go back to the data, check it with users and the team and decide what makes sense to keep.