I design apps and the systems behind them.

Product Designer with 15 years of experience helping teams ship web and mobile apps, supported by tokenized design systems.

Selected Work

Featured brands

Pause logo animation

Gnosis App
Self-custodial money app with a Visa card.
WeMachines
Workspace for software teams and their AI.
KidsKonnect
Childcare and staff planning app.
Noumena
Cross-platform fintech platform for freelancers.
MediSynth AI
AI-assisted drug development process.
HFnGG
Tournament gaming platform.
Mavelle
Organic skincare store.

What I do

Product discovery
I help teams understand the problem and decide what to build.
Web and mobile apps
I design flows, screens, and interactions, from early ideas to release.
Design systems
I build reusable components and token-based systems that keep products consistent.
Prototyping
I use AI to build interactive prototypes while testing ideas.
Working with developers
I document the details and work closely with developers.

AI in my workflow

AI doesn't replace my design process. It helps me iterate rapidly, think faster and make better decisions instead.

Pause animations

Clickable prototypes built in code
I build complex flows as working code with real states, not static click-throughs. This site started as three prototypes compared side by side.
Exploring different directions
I use AI to try different layouts and interactions, then compare what works before taking a direction further.
Tools I build for the way I work
Custom tools that take care of repetitive tasks and give me more time to focus on design.

About me

I started with websites and brand identities. Over the past 15 years, my work has grown to include web and mobile apps across fintech, DeFi, biotech, e‑commerce, and gaming.

Understanding the problem. I ask questions early to understand what users need and what matters to the business.
Designing the details. I design flows, interactions, and components, using design systems to keep the product consistent.
Working through to launch. I work closely with developers to resolve edge cases and check the details as the product takes shape.

Tools

Figma
Affinity
Claude
Codex
Photoshop
GitHub

Recommendations

“Jacek goes beyond introducing new ideas, actively improving products and enhancing user value. His design approach, rooted in extensive user research and business insight, ensures projects impress aesthetically and align effectively with business objectives.”
Matthew Lentowczyk on LinkedIn, opens in a new tabCEO @ TISA
“Delighted to recommend Jacek, an outstanding professional and enthusiast. His design prowess shapes aesthetic, functional solutions. Crucially, he builds lasting business relationships, prioritizing client needs and expectations.”
Kamil Rzeźnicki on LinkedIn, opens in a new tabCTO @ HeroDOT