Say hello
← All Work
Gaming eCommerce

Kalorian | Inventory Management

Company
Kalorian (CØNTACT Systems)
Role
Sole Product Designer
Team
Product Manager, Engineering, Beta Gamers

ScopeBuilt bulk-listing and full-inventory browsing for marketplaces with thousands of items, as the company’s only designer.

Kalorian

Overview

Kalorian was an early-stage marketplace for buying and selling in-game items. As the only designer at the company, I rebuilt how sellers managed and listed their inventory, replacing a six-at-a-time carousel with a system built for people who could easily hold hundreds of items across multiple games. I also built the company’s first design system from the ground up, the foundation every screen here is built on.

The Problem

The original inventory forced users to click carousel arrows repeatedly through a collection that could run into the hundreds or thousands, and there was no way to sell more than one item at once, a serious limitation for gamers offloading large collections.

6
items visible at a time, behind carousel arrows
1
item sellable at a time
Original inventory design.
Kalorian's original inventory screen where items were listed one at a time

Approach

I ran competitive analysis on other resale platforms, stayed in active conversation with beta users through the company Discord, and researched how inventory is actually presented inside games. That last piece shaped the key insight, that a game and a storefront want opposite things from a thumbnail:

Inside a game

Small, unlabeled thumbnails

Players already recognize their own items

  • • Speed and density over explanation
In a storefront

Larger, labeled images

Strangers browse unfamiliar items

  • • Clarity over density
My call

Small thumbnails with names on hover in the seller's own inventory, and larger labeled thumbnails on the discovery storefront where people browse unfamiliar items.

Inventory search.
Kalorian inventory search interface for filtering a large item catalog
Selecting items from search results.
Selecting items from search results
Setting prices across selected items in one batch.
Setting prices in bulk

Solution

The core change was a "selling state" that turned bulk listing into a quick, repeatable flow:

Toggle selling state
flip inventory into sell mode
Multi-select items
tap to add, no arrows
Live count in the sell bar
selection tracked in real time
Price the whole batch
one set of prices, all at once

Game-based filtering at the top of the inventory made a large, multi-game collection easy to narrow before selecting.

Early iteration: sell bar tracking selected items.
Early sell bar iteration
Early iteration: expanded selling view (v1).
Early expanded selling view
Later iteration: expanded selling view (v4).
Later expanded selling view
Final redesigned inventory system.
Kalorian's redesigned inventory system supporting bulk listing and full-inventory browsing
Video walkthrough of the final inventory and bulk-selling experience.

Outcome

Gamers responded well to the new browsing and bulk-selling experience at launch, and we shipped a separate listings page where sellers could track and edit active listings in one place.

Kalorian lost its funding shortly after launch, during the 2020 shutdown, so there's no longer-term data on how this feature moved the business. I've kept it in my work because it's an honest example of solo-designer ownership under real constraints (from research through shipped product) even when the company didn't get the runway to prove it out.

← Previous
AT&T