About

I do UIs and the strategy behind them.

I’m Mark (left), a Dutch Product designer working from strategy to shipped code. Always have, it’s what got me hooked on design over a decade ago. Since, I’ve worn many hats working in startups and for myself.

Picture of Me Picture of my dog Murphy

What I do.

I’m a designer, not a decorator. A product builder, not a picture maker. And a code shipper, not just a prototyper.

Set product direction
First I help you uncover the real problems worth solving. Then I work with you narrow them down, prioritise initiatives, and shape the solution. This creates more alignment with stakeholders and clarity on what to do.

Crack design problems
I work end-to-end to design quality interfaces and build robust systems: From ideas to visuals to the finished product. By prototyping early and often we will ship quality software that people love.

Nail front-end implementation
I work closely with developers and write production-ready HTML, CSS, and JS/TS. Together we improve accessibility, performance, reliability, and durability — with delight in key places.


You’ll working
with me if…

You want someone who takes ownership.
I don't need much oversight to do good work. I set my own direction, manage my own time, and know when to ask for input. You can trust me to build something (from scratch) and see it through.

You want to build great products.
Quality comes from iteration, not imagination. I help you make the right trade-offs and get something real in people’s hands early. It’s the best way to find out what works. A kick-ass half always beats a half-assed whole.

You want to launch on time and on budget.
The best is relative to your constraints. Without limits, there’s always a better version. That’s why I work with fixed deadlines and budgets. When something needs to give, it’s the scope — not quality.

If this resonates, reach out: contact@mrkdbrn.com


Book recommandations.

Here a small selection of books that taught me how to build better products and make smarter decisions.

Working with Mark was a pleasure. He’s organised, efficient, and consistently delivers high-quality work. He ensures his solutions are strategically sound, and has a strong technical understanding of UX/UI implementation.”
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Jasper den Ouden
Product Strategy, UX & Co-founder

Mark was far more than just ‘the designer’, he was a true partner in building products, consistently elevating the quality and pace of our work. He not only crafts great experiences but also ensures they get built the right way.”
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Jelle Spekken
Head of Technology

Mark helped us set up a professional product team. He has an eye for detail, is thoughtful and very critical. What I found remarkable was how he kept both the business and user needs in consideration with every decision.”
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Vijay Durán Jiménez
CEO & Product Owner

Mark’s designs were always backed up by data and impactful for both our customers and the company. His broad range of skills, from product strategy to development, make him a force multiplier for any product team.”
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Doménico Schwalb
Chief Product Officer