Sébastien Deconinck
Work
4
Pricing
€
Contact
Product
&
brand
design
studio
Shaping minimalist interfaces
and digital experiences for bold companies.
Last experience
Bitstack
2022 - 2025 (YC S22)
PRODUCT DESIGN
BRAND
MOTION
GROWTH

In February 2022, I joined Alexandre Roubaud and Kabir Sethi (co-founders of Bitstack as founding and generalist designer.

My purpose was to design an intuitive product and a standout brand to democratize Bitcoin in France and Europe.

+300K
Account created
+€200M
assets under custody
4.8/5
Average rating on each platforms
In just two years, we've achieved significant milestones, thanks to a united team. Every day, we were dedicated to serving our users, growing the company, and enhancing the product.
A comprehensive art direction has been done, complemented by a series of illustrations (approximately 50) that visually support and enhance the overall concept. Thanks to that we've had a real impact on the brand's influence in our market, and we've gained a competitive advantage as a result.
A complete icon pack has been designed to visually reflect the core values and mission of Bitstack.
Over the past three years, I've developed a robust design system with over 300 components, enabling efficient management of more than 500 screens across 30 different flows.
Visit website
A comprehensive 30-pages website has been designed, featuring a robust learning platform named “Learn Bitcoin”. I’ve used Webflow to reach that complex website.
A debit card will be available soon, offering cashback in Bitcoin on every transaction. (stay tuned)
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EARLIER PROJECTS
Open
Bastille
Founded by Gilles Henry and based in Paris, Bastille's ambition is to reinvent urban mobility with the creation of a new-generation folding bike.
Open
Bitstack (V1)
In 2 years, before the V2, we've reached ambitious milestones, drove by a cohesive team. We’ve worked hard every day, serving our users, to grow the company and improve the product.
Open
Mauco
Founded in 1967, the family business MAUCO has developed expertise in packaging for wine and spirits. Few years ago, I was responsible for renewing the company's identity as well as creating the new e-commerce website.
Pricing
PRODUCT DESIGN
Starting at
€10,000 /month
Start
Core or secondary feature improvement
Core or secondary feature improvement
Onboarding improvement
Delivery Support
Design System Redesign
Weekly Product Meeting
branding
Starting at
€4,000 /month
Start
3 logo proposals
3 Reviews
Brandbook
Logo Guidelines
Illustrations (x5)
Bi-weekly meeting
WEBSITE
Starting at
€8,000 /month
Start
Design in Figma
Webflow development
Design system (Figma)
3-5 pages / month
Blog ( Additionnal payment)
Weekly Checkin
Starter pack
Starting at
€44,000*
Timeline ~3 months
Start

Get the ultimate go-to-market package - everything above - and quickly launch your company past the competition.

*30% financial deposit before starting the contract.

Pricing may vary based on factors such as project complexity, design requirements, functionality, timeline, content creation, and the level of customisation needed. Each project is unique, and we tailor our pricing to ensure the best ROI possible for your company.

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Let’s build something
together.
Get in touch.
Contact
Sébastien Deconinck
2025 All right reserved.