Self-Custody Trading Product Design System

Marko Puric

The last thing you need as a startup founder?
Hiring a bad product (UX) designer.
You have to chase investors. You have to coordinate sales team. You have to create a marketing strategy. You have to come up with a sustainable business plan. You have to ensure everything is executed within the deadline.
And it’s all for nothing,
if the designer creates a bad user experience.
I had a great opportunity to work on a design for a self-custody trading app.
The client reached out because they didn’t like the visual look and UX of their existing product.
I started from the foundation,
by asking the client a lot of questions.
• About the product • About future users • About the competitors • About client preferences • About potential challenges • About their vision and goals • About their visual style preferences • About the issues with the previous design
Then I started defining the visual language by creating multiple variations for 2 main screens in the app.
After we agreed on the style, I started researching and analyzing the most popular competitors.
I picked the ones that had the most user satisfaction.
Then I analyzed user flows, app navigation, proportions of design elements, screen layouts, etc.
With these insights, I was ready to start building the new design system and the first flows of the platform.
5+ months later:
• 150+ screens designed • 60+ components • 15+ user flows
The results:
- A client who is even more confident in their product - Users who engage with the product every day - Investors interested in funding its growth
-
Need a designer for your SaaS or fintech product?
➡️ DM me "product designer" and claim free 15-minute consultations.
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Posted Jul 6, 2025

Bad UX kills startups. I helped a trading app go from clunky to investor-ready. DM “product designer” for a free 15-minute consult.

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