Designing products
that earn trust.

Hi, I'm Di. You can also call me Julie. A China-German fusion designer with 5 years in UX, currently doing freelance work in B2C and B2B platform design, augmented by AI workflow.

"Ms. Gao developed a GPT-based chatbot, 'Product Development Coach,' that supports engineering method selection using frameworks such as iPeM, InnoFox, and SPALTEN, and will be integrated into our Integrierte Produktentwicklung course. I am confident that she will be an outstanding contributor in any advanced academic or professional environment."

Prof. Dr.-Ing. Dr. h. c. Albert Albers IPEK · Institute of Product Engineering, KIT

"Ms. Gao's professional experience is distinguished by her dedication, collaborative problem-solving, and remarkable track record in performance evaluations. I thoroughly enjoyed working with her, as she consistently demonstrated exceptional cooperation, teamwork, and strong personal and soft skills that contributed to the overall success of the projects we undertook together."

Ben Sun CEO · Orka
Orka Two hearing aids app onboarding screens
B2C App

Orka Two Hearing Aids App Onboarding

New hearing aid users were returning devices within two weeks. I redesigned onboarding around that critical window. Result: 5.3/7 satisfaction score.
PetsTech cardiac monitor device
Hardware UI

PetsTech Cardiac Monitor UI Design

A 20,000 CNY veterinary cardiac monitor with a segment LCD display. Every pixel is a hardware cost. Three concepts. One shipped.
RullJa IoT dashboard interface
Dashboard Design

RullJa IoT Dashboard — Investor Demo

A waste-tech startup needed to pitch IoT fill-level sensors to investors. €100M+ addressable segment in Germany.
Agile CPS research visualization
Research · ECIE 2025

Agile Methods in CPS Startups & SMEs

Master's thesis published at ECIE 2025. 1,929 papers reviewed with an AI-assisted extraction workflow.
Mercedes-Benz e-Wagen factory floor
Service Design

E-Wagen Simplification @ Mercedes-Benz

Factory floor user research at Sindelfingen. Personas, journey maps, and a full service design for e-trolley sharing.
German telehealth infrastructure mapping
Critical Infrastructure

German Telehealth Infrastructure Mapping

Mapped German hospital network architectures as a structural baseline for NIS2 threat modeling. Commissioned by KIT OCI.
Rullja smart bin sensor
Market Research

Rullja Smart Bin Sensor — Market Report

TAM/SAM/SOM sizing, 10 competitors mapped, buyer segmentation, and a three-phase go-to-market for the municipal space.
IPEK AI Consultant interface
AI Tooling

Engineering Knowledge into an AI Consultant

Two AI tools for KIT IPEK. Used by 50+ students. Built at zero software cost in half the expected timeline.
Cincobox invoice automation
Automation Confidential

Cincobox Bill AutoBot

A CEO was losing one full day every month to manual invoicing. I restructured the database and built an automation.