05 · About the author

I work where interface, product judgment, and systems meet.

Name: The Product Architect
Author: Joost van der Zwan

Fig. · four seconds, silent, repeating

Joost van der Zwan in profile against a dark interior, turning slightly toward the light.

I'm Joost van der Zwan, a designer and builder. I run Studio JZ and work in product design at Tetrifox. I wrote and built The Product Architect to make a specific kind of work inspectable.

I'm Joost van der Zwan, a designer and builder. I run Studio JZ and work in product design at Tetrifox. I wrote and built The Product Architect to make a specific kind of work inspectable: connecting interface decisions to system behavior, workflow, trust, and implementation.

The public evidence is the product you are reading: its argument, working frameworks, frontend implementation, and local-first reader tools.

Role: Designer and builder · Studio JZ · Product design at Tetrifox
Coordinates: Interface · Systems · Workflow · Trust · Behavior
Write: joost@studio-jz.nl

LinkedIn: Joost van der Zwan
Instagram: Studio JZ • Design, Behavior & Science
Newsletter: One Field Note a month
This site: The book, the frameworks, Field Notes, and the Field Kit

Origin · Why this book exists

For a long time, I thought the tension was personal. I could build interfaces, but I kept drifting toward the decisions underneath them.

The workflow behind the screen. The behavior behind the feature. The trust problem behind the UX issue. The product call hiding inside what looked like implementation detail.

Eventually, the pattern became too clear to ignore: the interface was where the deeper product became legible.

Interfaces show. Behavior decides. I design how software behaves.

Chapter 12 asks you to build evidence for a new role. This site is mine: written, designed, and built by me, and still changing.

Read the manifesto

The Product Architect · About

A Studio JZ field book