Cardi

Digital identity, redesigned.

A professional identity between a business card and a social profile.

Role: Solo build — product, design, and full-stack engineering.Product · Design · Frontend · Backend · Infrastructure · Mobile
Type: SaaS · Web Application · Mobile App
Year: 2026

01 — Overview

Cardi is a digital business card designed for the space between a business card and a social profile.

It gives people a professional way to introduce themselves, share their work, and stay connected — without the waste of paper or the noise of a full social network.

02 — The Problem

Paper is static. People aren't.

Names, titles, companies, and contact details all change — and each time, a stack of perfectly usable cards becomes obsolete.

The alternative is trading social profiles, but those carry far more than a first professional introduction needs.

03 — The Idea

A card that updates itself, and shows only what you choose.

Name, title, and contact details stay current for everyone who already has your card.

Alongside them you can add a portfolio, selected social links, and what you've done.

So the card carries a full professional introduction without carrying your private life.

04 — Design

05 — What Was Hard

Changing a habit, not just a format.

Paper cards are deeply established in Korea, so the harder problem was shifting a habit rather than building a feature. I studied the US market, where adoption is further along — the functionality was solid, but the design left room to go further, so most of my effort went into the interface.

Designing the right amount of information.

A professional profile needs enough context to be useful, but not enough to become another social feed. Deciding what belonged on a card and what didn't shaped much of the product.

Ravo Research