Hi I'm Soojin, I design where AI meets human intuition—for everyone.

Seven years designing AI people can trust, from agentic assistants to enterprise model tooling. I lead 0→1 product design end to end and own it through engineering handoff.

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Currently shipping T-Mobile's first agentic AI
Agentic AI 0→1 Product Consumer Craft Enterprise AI Tooling

Selected work

Three 0→1 systems · 2020–2026
01

T-Mobile Agentic AI

Led 0→1 design of T-Mobile's first AI assistant, turning the overwhelming switching journey into a guided conversation. Three moments from the shipped product, across web, iOS, and Android.

Lead Product Designer · 2024–2026 View case study
9:41

Agentic bill assistant. The entry moment: the assistant reads the bill, explains what changed, and stays ready for follow-ups. One tap, one clear answer.

Voice-led multimodality. As the conversation moves, the interface follows. Options and visuals surface only when they help. People talk to it, they do not manage it.

Always within reach. The assistant stays present on every screen. While browsing devices, people can compare options, surface the promotions they qualify for, or start an upgrade — without leaving the flow they're in.

02

T-Mobile Coverage Map

Redesigned how the millions who check T-Mobile's coverage each year read network data, turning dense signal maps into something anyone understands at a glance.

Lead Product Designer · Web · 6.2M annual visitors View case study

Will this work where I live. Search an address and see your exact block. The map answers the one question people actually have.

Dense data, read at a glance. National signal data redesigned to be legible in seconds, for the 6.2M people who check it every year.

Coverage inside the everyday app map

Where the app already lives. Coverage sits alongside the everyday map people use to find family and places—one tap from where they already are.

5G coverage result for a searched address

A verdict, not a legend. A searched address returns one plain answer—strong outdoors, limited indoors—instead of a color key to decode.

03

Mondrian AI

Founding designer of a B2B AI platform that made complex model tooling usable for enterprise teams. Grew revenue 300%, adopted by Samsung and Hyundai.

Founding Product Designer · Enterprise web · 300% revenue growth View case study

One home for the whole platform. The redesigned dashboard for enterprise ML teams. Data Catalog, Studio, and SharePoint unified behind a single, scannable entry point.

Reports people actually read. Published notebooks become legible reports with inline discussion, so insights get shared and discussed, not buried.

The flow, in motion. A recorded walkthrough of the live product, from the welcome state through recently updated projects.

Now

Senior Product Designer,
T-Mobile

AI Innovation Lab and Foundations. I lead 0→1 product design end to end and own it through engineering handoff. Three times, across three different problem types.

Recognition
4 AI design patentsPatents
5 HCI papers, IEEE / ACM · Best Paper AwardResearch
Lecturer, Fast Campus · Mentor, Google Developers GroupTeaching
M.S. Computer Science, UW · M.S. Design Intelligence, YonseiEducation
Contact

Let's talk.

Open to senior product design roles on teams who treat craft as the work, not the polish.

Email
soojin.ux@gmail.com
Phone
425.749.0557
LinkedIn
in/hwangsoojin
Resume
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