
Jan Roose
I build, design, and run first-of-its-kind products, mostly in AI, B2C & Gaming
Well-designed tech can make life better, bring joy, and every bit of innovation counts.
Currently growing Kaloricke Tabulky, the #1 health & fitness app in the CEE region, with 10M+ users.







Dine4Fit - Helping Millions Eat Healthier and Live Longer
Kaloricke Tabulky by Dine4Fit is the #1 health & fitness app in the CEE region, with over 10M users. You can use it to track your caloric intake, macronutrients, and physical activities.
We’re improving KPIs across the board by refining our brand, building a roadmap, talking to users daily, and consistently shipping new features.
In 2023, I started working with Dine4Fit as a freelance designer, and in 2024, I joined as CPO.
Executive, Product Management, UI/UX, Brand, Design System
Visit KalorickeTabulky.cz, or download on Google Play & the App Store.
Featured in Forbes, CzechCrunch or Hospodarske Noviny


When Away From Keyboard
At my core, I’m an early adopter, always excited about new technologies like VR, AI, or BMI.
Sometimes I switch from a keyboard to a controller to enjoy the latest RPGs like Baldur’s Gate 3 or a new FromSoft game.
When I turn off the screens, I love running, lifting, hiking, or traveling.
My bucket list includes traveling to Antarctica, visiting all European castles, and sailing at night in the Pacific.










Fireball - Bringing Tabletop RPG to Mobile Gaming
We founded Fireball to bring D&D-style role-playing games to mobile. Our app lets you go on epic adventures with friends, using chat and dice. We also built a robust character builder, map editor, and a matching system—fully native for iOS and Android.
To bring this idea to life, we got $1.5M in funding from VC and angel investors, including the creator of Beat Saber. Plus, we raised $65K through Kickstarter from nearly 3K backers, making us the 5th most backed mobile project at that time.
Founder, CEO, UI/UX, Marketing, Crowdfunding, Fundraising, Brand
Play at fireballrpg.com
Featured in GeekTyrant, PocketGamer, Lupa and CzechCrunch









AIMS - Launching Next-Level AI Music Search
Production music professionals typically rely on keywords to find music. AIMS changes that by using AI models to enable searches via links, files, or natural language.
We designed the new AIMS web platform* and created over 40 custom client decks.
*The AIMS platform is constantly evolving, meaning the design version showcased here is already out of date.
UX/UI, Design System, Brand
Search for music at AIMSapi.com
Featured in Musically, CzechCrunch and CultureNet









SpaceKnow - Unlocking Insights From Low Earth Orbit
SpaceKnow is on a mission to index the physical world.
I joined in 2015 to design their analytical tool, allowing anyone to perform AI-powered satellite image analysis directly from their browser.
UX/UI, Design System, Brand
Visit Spaceknow.com
Featured in Bloomberg, Washington Post and Financial Times





















e-Nable World - Delivering 3D-Printed Prostheses
I designed an app that connects makers of 3D-printed prostheses with those in need. It streamlines the process of customizing prostheses to fit the recipient’s body.
We developed the app during STRV Academy competition, where we secured second place.
UX/UI, Brand
Visit STRV.com









Daytrip - Turning Inter-City Travel into Experience
With Daytrip, you can book a trip from city A to city B and explore amazing sights along the way with an English-speaking local driver.
I redesigned their web platform and defined a new design system.
UX/UI, Design System, Brand
Book a trip at Daytrip.com
Featured in HuffPost, Forbes and TravellingBuzz
















DataBreakers - Building AI-powered Personalization
Databreakers developed a tool called Booster, which can increase e-shop revenue by 5-25% using AI. I designed the original version of the platform and created a landing page.
Another tool we collaborated on was Promoter, which enhances the efficiency of Facebook ads.
UX/UI, Research, Design System
Visit Databreakers.com