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SEQ SCORE
6.8
NPS
72
TIME-TO-VALUE
< 24h

DESIGN ISBUILDING

I'm Mariusz. I design sharp interfaces, validate them in code, and ship measurable product improvements.
you can hire my friends

Design is only
as good as what
it ships.

  1. Prototype before you polish. Strategy gets sharper when it has to survive a working interface, not just a slide.
  2. Every decision earns its place. Design debt starts with choices nobody can defend. I keep the reasoning visible.
  3. I come from doing both. Front-end since 2007, back when design and code were the same job. I still use the whole stack when the work has to ship.
  4. Measure what changed. Shipping screens is vanity. Moving the product is the job.

What people say

Proof from people who have seen the work up close: product judgment, speed, craft, and follow-through.

Claire Tsukuda
"Mariusz is a phenomenal designer and the reason we were able to build so rapidly. His turnaround time on high fidelity mock-ups was incredible and we rarely had to iterate on his initial designs because he understood the product and our users so well."
Claire Tsukuda
CEO @ Kipsi
George Pipoly
"Mariusz is an incredible product designer. He always made my job as a Product Manager easy. His designs are always comprehensive. He immerses himself in the customer journey. His thorough research is evident in his designs."
George Pipoly
PM @ Weedmaps
Meesh Lin
"Working alongside Mariusz was one of the great privileges of my design career. He can take the most complicated problems and design beautiful and functional solutions with ease and swiftness. Mariusz is a true design leader and would be an invaluable teammate and asset to any design organization."
Meesh Lin
Head of Design @ Paragraph
Jordan Lunetta
"Mariusz is an absolute pleasure to work with. He's a seasoned design leader and does an excellent job managing the customer and business goals in tandem with the product design. I give him my highest recommendation!"
Jordan Lunetta
CEO @ Kiro
Sarah Sandberg
"Mariusz is an excellent product designer, whose superpower is a deep insight into his customers. His curiosity in understanding customer pain points is clear in his user-centric solutions, and he looks beyond current product limitations to design the right product for customers."
Sarah Sandberg
Lead PM @ LILT
Danielle Chircop
"Mariusz has a great combination of skills. He's highly creative, very technical, and very practical at the same time. I worked with him on a highly innovative, boutique product that needed to bend the rules from anything we have done in the past. Mariusz was the perfect designer for this. He was always steps ahead of me and brought really great ideas to the table that made large impacts to the product and still worked within our timeline."
Danielle Chircop
Product @ Kaplan

Things I find beautiful

Visual references that shape my taste and craft.

Got a problem worth solving?

Best fit: senior product design, design systems, modern tooling, interface quality, and teams that need someone who can move from strategy to shipped details.