Case Study
Żabka is Poland's largest convenience store chain, with 12,500 stores and 10,000 franchisees operating on a model built around speed and proximity. They needed to get into e-commerce fast, but did not know what form it should take: fold it into their existing loyalty app, launch something new, or partner with a delivery platform. Ueno was brought in to navigate that ambiguity.
In Poland, the average person is never more than 400 meters from a Żabka
Research ran in three tracks simultaneously. Category research mapped the global on-demand convenience landscape and where Żabka had a genuine right to win. Company research ran stakeholder interviews across Corporate, Product, Operations, Commerce, and Customer Care. Customer research brought us into the field with real Żabka shoppers.
We put paper prototypes in people's hands to understand how they thought about convenience, delivery, and the Żabka brand. Some ideas that tested well, like group shopping, opened up entirely new design and operational questions. Those edge cases became design challenges in their own right.
Testing paper prototypes with real Żabka shoppers
Building a delightful e-commerce app is hard. Building one that works at Żabka's scale, with franchisee-run stores, variable inventory, and a 15-minute delivery promise, required solving problems with no obvious answers.
Franchisee consistency: with 10,000 independently operated stores, the experience needed to feel consistent regardless of which store fulfilled the order.
Variable inventory: SKU selection varies by store. Choosing delivery versus pickup dramatically changes what products are available and the entire browsing experience.
The 10% inventory gap: systems said one thing; shelves said another. What happens when an ordered item is not actually in stock? Cancel, substitute, reroute, or deliver without it?
The 15-minute constraint: we identified early that delivery needed to happen in 15 minutes or the value proposition fell apart. Every design decision had to be tested against that constraint.
Group shopping edge cases: features that tested well in research, like splitting a delivery among neighbors, opened up complex questions about payment and accountability.
Much of the real design work happened at the service level, not the UI level. We mapped the full e-commerce experience across delivery and click and collect, tracking customer actions, store actions, pain points, and opportunities at every touchpoint. The experience map made operational complexity legible and gave the product and engineering teams a shared model to reason from.
E-commerce experience map
With a catalog spanning thousands of SKUs across stores with different inventory, one of the core challenges was ensuring products were named, grouped, and surfaced consistently regardless of store or context. We defined taxonomy rules that accounted for time of day, season, and user behavior, so that the right products appeared at the right moment.
We worked closely with the Żabka team to make sure recommendations would resonate with the Polish market, from naming conventions and editorial voice to how promotions and bundles were framed. Bundles were curated sets of products designed to editorialize the catalog, surface underused items, and increase basket size while feeling genuinely useful rather than promotional.
Category taxonomy with room to grow
Curated product groupings
After the core design work was complete, we ran a separate monthlong sprint to streamline and codify the design system. The system was built on three foundations: experience principles that defined how Żabka Jush should feel, an atomic design approach that made the component library scalable, and a content, language, and UX/UI framework that kept the experience consistent without needing to spec every use case.
This was one of my favorite projects of all time. Working alongside an exceptionally talented team including Anton Sten, George Kvasnikov, Amanda Chessa, and Lee Simpson, and a bold and collaborative client who trusted the process. It was the kind of engagement you hope every project will be. The work spanned the full arc from opportunity definition upstream to design system documentation downstream.
App launch
Home and browse
Cart and checkout