A psychologist's field notes on working in tech.
For designers who know what they should be doing but can't seem to start. A weekly newsletter on the patterns underneath — and 1:1 sessions and a small cohort for breaking them.
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Field notes on psychology & product strategy. No fluff. No Figma tutorials.
Every issue follows the same structure: a 3-minute video on what I've been noticing, then a tactical essay you can use tomorrow at 9 AM.
Stakeholder Psychology
How PMs think, why engineers resist, and the behavioral science behind getting buy-in without formal authority.
Business-Fluent Design
Translating design decisions into the language of retention, risk, and revenue — the vocabulary that gets you heard in strategy meetings.
The Intentional Career
The psychological work of deciding who you want to become professionally — not just collecting frameworks, but building the identity to use them.
The Autopilot Problem
How attention gets hijacked, why decisions happen before you notice you're making them, and what it takes to actually catch the moment of choice.
Who writes this
I'm Stefan Vilar Markiewicz — a Product Design Manager in Porto with a master's in psychology and a postgraduate in UX research. I still lead design work full-time. A lot of what I write starts from noticing my own patterns — I track them with a simple ACT-style log I built for myself.
Work with me
Everything here runs on one lens: the behaviour is downstream of the pattern. Some of this work is inner — seeing what's actually running you. Some of it is outer — the reps that change how you operate. Most people need both.
FLAGSHIP · PRIVATE COHORT
The Shaping Course
An eight-session rehearsal program for UI designers who want to work further upstream — on the work already on your plate. One rep per session, on your live project. Currently running as a closed pilot.
1:1 · OPEN
The Clarity Session
Two focused sessions (60 min + 30 min) with someone whose background is psychology and whose day job is product design. We name the pattern underneath the stuckness, you leave with a written clarity document, and one concrete move. €150.
ENTRY POINT · OPEN
The Positioning Session
One hour on how your CV and portfolio read to someone who regularly reviews design applications. I review both beforehand, we clarify what role you're actually going for, and you leave with written takeaways. €120 for the first five, then €180.







